Treekote tree wound dressing is an asphalt-emulsion wound dressing manufactured by Eaton Brothers and stocked by professional arborist supply chains including OESCO and Sherrills Tree — the same chains that carry gear ISA-certified arborists actually use on the job. It's one of the few wound dressings cited by name in published oak wilt control research, and it's available in formats ranging from an 8oz aerosol for fresh pruning cuts to a 1-gallon tub for nurseries and contractor crews. If you're working on oaks or elms during the growing season, or sealing a graft union on a fruit tree, this is what professionals reach for. Check current availability and pricing on Amazon.
A 2007 study in Arboriculture & Urban Forestry (Camilli, Appel & Watson, Vol. 33 No. 2) named Treekote specifically as effective for controlling oak wilt spread — one of the only wound dressings to earn that distinction in published research.
Nitidulid beetles that carry oak wilt spores are attracted to fresh pruning cuts within hours on a warm day; Treekote's protective barrier must be in place before they arrive, not after.
Treekote uses a water-soluble asphalt emulsion that stays flexible after drying, won't damage cambium tissue, and allows callus to form naturally — which is why it behaves differently than pure asphalt coatings.
Aerosols for fast coverage on fresh cuts, brushtop containers for controlled application on larger wounds, a gallon tub for commercial crews, and a separate natural-wax formula for graft unions — each format exists because different jobs demand different tools.
Every product in the Treekote line addresses a specific tree care task — wound sealing, graft protection, or trunk shielding from frost, sun, and pests. The right format depends on what you're doing and how much coverage you need, so the cards below call out exactly what each one is built for.
The smallest aerosol in the lineup at 0.5 lbs and 2.75×2.75×6.5 inches, the 8oz is also the highest-rated wound dressing Treekote makes — 4.7 stars across 403 reviews. The asphalt-based emulsion formula applies via push-button nozzle and is explicitly positioned for small cuts and grafting work, where precision matters more than volume.
Best choice for homeowners doing occasional pruning or graft sealing — compact enough to keep in a pruning kit and rated higher than any other aerosol in the lineup.
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The classic single-unit 12oz aerosol — part number 212, the SKU stocked at Home Depot and Lowe's for decades. At 6.5×2.5×2.5 inches and 1 pound, it delivers more product than the 8oz without the bulk of a brushtop container. Same asphalt-based emulsion formula, same push-button nozzle, same application method: spray from 8–10 inches, thin even coat.
The standard format for gardeners who want the familiar single-can aerosol that's been on hardware store shelves since Treekote became a household name in tree care.
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Two 12oz cans bundled — 24oz total — rated 4.6 stars across 510 reviews, which is the largest review pool of any Treekote aerosol listing. The aerosol format is the fastest application method in the lineup, and having a second can on hand matters when you're pruning multiple oaks or dealing with storm damage that can't wait for a reorder.
The best-value aerosol option for home users who prune more than a couple of trees per season or want a backup can ready before oak wilt season starts in February.
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Six 12oz cans — 72oz total — at contractor quantity. Same formula, same nozzle, same part number (300212) as the single and 2-pack. The listing notes only 20 units left in stock, which matters for crews that need consistent supply across a full pruning season. At this volume, the per-can math shifts noticeably in favor of bulk purchase.
Built for tree service crews and landscapers applying wound dressing across multiple properties — the only aerosol format that makes sense at commercial scale.
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The 16oz tub is an open paste format — no built-in applicator — with a smooth consistency designed for spreading with any standard brush you already own. At 3.5×3.5×4 inches and 1 pound, it's compact and rated 4.6 stars across 408 reviews. The product listing also notes it can be used to seal clay pots, which points to its broader utility beyond tree wounds.
Good fit for gardeners who prefer to use their own brush and want the lowest entry point into the Treekote wound dressing line — same formula, no applicator included.
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The 16oz brushtop adds a built-in brush applicator to the same paste formula as the tub — at essentially the same price point. Dimensions are 3×3×5.5 inches, weight is 1.15 pounds, and it's rated 4.5 stars across 336 reviews. Positioned for routine pruning and cuts, with the Made in USA notation explicit in the product listing. The brush applicator is the practical differentiator over the tub at this size.
The right starting point for home gardeners who prune regularly and want the convenience of an included brush without moving up to the larger 32oz format.
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The largest single brushtop unit in the lineup at 32oz — double the volume of the 16oz brushtop, same built-in brush applicator. Dimensions are 3.75×3.75×7.5 inches at 0.975 pounds, rated 4.4 stars across 418 reviews. The product listing describes it as built for "frequent pruning jobs," which is the right frame — this is the format for orchardists and property managers who prune on a regular schedule.
Best for anyone doing consistent seasonal pruning across multiple trees — the volume makes sense once you're applying wound dressing more than a handful of times per year.
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This is an alternate ASIN (B0118I3GB2) for the 32oz brushtop, listed under the earlier manufacturer name WalterEClark&Sons with part number 300032. It carries a lower review count — 25 reviews at 4.1 stars — compared to the primary 32oz listing, but the formula and application method are the same. If you're linking directly, the primary 32oz listing (B000OW9UQE) has a deeper review base to draw from.
Functionally identical to the primary 32oz brushtop listing — the alternate ASIN reflects Treekote's long manufacturing history but the primary listing is the better-reviewed option.
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The 1-gallon (128oz) tub is the commercial and nursery format — 24 pounds, 15.75×11.5×7.5 inches, applied with a standard brush or applicator. Rated 4.2 stars across 89 reviews, with the limited product description reflecting its positioning as a bulk supply item rather than a consumer package. Only 10 units currently in stock on Amazon.
The right format for nurseries, commercial arborists, and tree service companies that apply wound dressing consistently across large volumes of trees — the economics only make sense at scale.
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A case of 12 × 16oz brushtop units (part number 300016) — 192oz total at wholesale quantity. No separate rating exists yet; this is a newer listing with limited stock (9 units available). At this quantity, the buyer is a distributor, contractor, or professional buyer stocking an operation, not a homeowner making a seasonal purchase.
Distributor and contractor quantity — only makes sense if you're stocking a supply room or reselling to professional accounts, not for individual tree care use.
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The grafting wax tin uses a completely different formulation from the wound dressings — natural wax ingredients, not asphalt emulsion, manufactured at Eaton Brothers' factory outside Buffalo, NY and rated suitable for organic use. At 3×3×2 inches and 0.35 pounds, the tin holds 8oz of wax that softens in warm water or hands for application. Once set, it hardens then cracks and falls off naturally as the graft grows. This listing has 583 reviews at 4.4 stars — more reviews than any other product in the Treekote lineup.
The choice for orchardists and fruit tree growers doing graft unions — the natural wax formula is a fundamentally different product from the wound dressing line, and the 583-review depth reflects years of use by serious grafters.
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The only product in the Treekote lineup that includes a cutting tool — an Opinel pruning knife alongside 4oz of grafting wax, 30 feet of stretchable grafting tape, and printed instructions with step-by-step photos and diagrams. Rated 4.3 stars across 3 reviews, it's a newer listing. At 6×6×3 inches, the kit is compact enough to be a gift item but complete enough to be a working toolkit for a first-time grafter.
Built for first-time grafters and anyone who wants everything in one box — the Opinel knife is the differentiator here, since experienced grafters typically already own their cutting tools.
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Double-layered crepe paper, 3 inches wide by 50 feet long, weighing 8oz in a 5×5×3-inch roll. Non-toxic and chemical-free, rated 4.6 stars across 546 reviews — the highest review count of any product in the Treekote lineup. The listing specifies up to 6 months of protection per use, covering sunscald, frost cracks, windburn, rodent damage, and trimmer strikes. Start at the base and spiral upward, securing with tape or staples.
The most-reviewed product Treekote makes — the standard choice for homeowners wrapping young trees or fruit trees heading into winter, with 546 reviews backing its track record.
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The commercial-scale tree wrap: 4 inches wide by 150 feet long versus the standard 3"×50' roll — three times the coverage in a wider format. Dimensions are 7.4×7.4×3.7 inches, rated 4.4 stars across 190 reviews. The listing covers the same protection categories as the smaller wrap — sunscald, frost, rodents, windburn, trimmer damage — and explicitly notes that it preserves moisture content of bark.
The right format for landscapers and property managers wrapping multiple trees per season — the 150-foot length changes the per-foot math considerably versus buying multiple standard rolls.
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A non-drying, tacky adhesive coating — 443.5ml in a small pail, rated 4.7 stars across 4 reviews — designed to be applied over tree wraps or bands to create an additional pest barrier. The formula stays pliable in cold and humid conditions without drying out, and is compatible with fabric, plastic, and vinyl wrap materials. The product description lists it as preventing tree disease when combined with standard wraps or banding materials.
Pairs with either Treekote tree wrap to add a sticky pest-barrier layer — the non-drying formula means it stays effective through temperature swings rather than hardening off between applications.
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100% jute burlap at 234 GSM (7oz fabric weight), 60 inches wide by 100 yards long — unprocessed and undyed, so expect slight natural variation in color and texture. The 45-pound roll covers a substantial amount of ground for large-scale gardening, nursery use, or winter plant protection. Biodegradable and free of chemical treatments, it can be repurposed in garden beds for weed control or erosion management after its primary use. Currently only 16 units in stock.
The widest burlap format Treekote offers — 100 yards at 60 inches gives nurseries and large-scale gardeners maximum flexibility to cut to any dimension they need.
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The narrower sibling of the 60" burlap roll — same 234 GSM jute construction, same 100-yard length, but 40 inches wide instead of 60. Same unprocessed, undyed natural jute with slight color variation across rolls. At the same overall yardage as the wider roll, this format suits applications where a 60-inch width would mean significant waste — garden bed edging, smaller wrapping projects, or crafting where the narrower cut is actually preferable.
Choose the 40" roll when you need 100 yards of burlap but the 60" width is more than your project requires — same fabric quality at a format that wastes less material on narrower applications.
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A camouflage-pattern jute roll measuring 20 feet by 48 inches — much shorter than the 100-yard natural burlap rolls, but woven at 10oz fabric weight, which the listing describes as 30% thicker than similar products. The 100% biodegradable jute has a non-glare finish suited to concealment applications. Currently rated 3.0 stars from a single review. Primary use case is duck blinds and hunting concealment; secondary applications include plant protection and outdoor crafts.
A crossover product for hunters and outdoor enthusiasts — the camo pattern and heavier 10oz weave make it distinct from the natural burlap rolls, though the short 20-foot length limits large-scale garden use.
See on AmazonEight wound dressing formats means eight different answers to "which one should I buy?" The table below compares every wound dressing SKU by application method, volume, speed, and the job it's built for. Grafting wax is a separate formulation and is covered in its own section.
| Format | Volume | Application Method | Application Speed | Built For | Applicator Included |
|---|---|---|---|---|---|
| 8oz Aerosol | 8oz | Aerosol spray | Fastest | Small cuts, grafting, occasional homeowner use | Push-button nozzle |
| 12oz Aerosol Single | 12oz | Aerosol spray | Fastest | Standard pruning, hardware store replacement | Push-button nozzle |
| 12oz Aerosol 2-Pack | 24oz total | Aerosol spray | Fastest | Home users pruning multiple trees per season | Push-button nozzle (×2) |
| 12oz Aerosol 6-Pack | 72oz total | Aerosol spray | Fastest | Contractor crews, multi-property applications | Push-button nozzle (×6) |
| 16oz Tub (Paste) | 16oz | Standard brush — not included | Slower | Routine pruning; users with a preferred brush | No |
| 16oz Brushtop | 16oz | Built-in brushtop | Moderate | Routine pruning and cuts, entry-level brush format | Yes — built-in brush |
| 32oz Brushtop | 32oz | Built-in brushtop | Moderate | Frequent pruning, orchardists, seasonal heavy use | Yes — built-in brush |
| 1-Gallon Tub | 128oz | Standard brush — not included | Slower | Nurseries, commercial arborists, large crews | No |
For oak wilt season, the aerosol wins on speed — you need to coat the cut before you put the saw away, and there's no faster way to do that than a push-button can. The brushtop formats make more sense when you're working on large storm wounds or bark damage where a brush lets you work from the center outward and pay attention to the wound edge. The gallon tub is only worth it if you're buying for a crew or a full season of nursery work — the economics don't favor it for occasional home use.
The most common question we hear isn't "does Treekote work?" It's "which one do I need for this specific job?" The answer changes depending on what tree you're working on, what time of year it is, and how much wound you're dealing with. Here's how to match the right format to your actual situation.
This is the scenario where getting Treekote right matters most. If you're cutting oaks between February and June in a wilt zone — Texas, Minnesota, Illinois, Wisconsin, Missouri, and most of the South — apply wound dressing the same day you make the cut. Don't wait until the end of the day if you can avoid it. The nitidulid beetles that carry oak wilt spores are attracted to the volatile compounds released by fresh oak tissue, and warm weather accelerates their arrival. The 8oz or 12oz aerosol is the right tool here: shake, spray from 8–10 inches, done. If you're running a crew and covering multiple properties, the 6-pack makes the economics work.
Cut size matters too. All cuts over ½ inch diameter should be treated. Smaller nicks from a handsaw or loppers on non-susceptible species don't need sealing.
Storm damage often leaves irregular, jagged wounds that are harder to coat evenly with an aerosol. The 16oz or 32oz brushtop gives you more control — work the paste from the center of the exposed wood outward to the wound margin, making sure the bark-to-wood edge gets covered. That edge is where beetles and spores enter first. Apply thin; if you can still see bare wood after one coat, do a second pass rather than piling on a thick layer in one go.
Honestly? For routine cuts on healthy apple trees, maples, or ornamental shrubs outside of wilt zones, you probably don't need wound dressing on every cut. The tree's own CODIT response is adequate for most small to medium pruning wounds on non-susceptible species. Where Treekote earns its place in the routine pruning context is large cuts — anything over 2 inches in diameter on a species you care about — or if you're in a region where Dutch elm disease or oak wilt has already been documented within a few miles.
Stop here and look at the grafting wax tin, not the wound dressing. The 8oz Grafting Wax is made from natural wax ingredients — a completely different formulation from the asphalt emulsion products — and it's designed to flex as the graft union swells without cracking. It softens in warm hands or a warm water bath, applies with a brush or fingers, then hardens and eventually cracks off naturally as the union knits. The wound dressing works in a pinch on graft unions, but the wax is the right tool for the job. First-time grafters should look at the Grafting Kit, which adds an Opinel knife and 30 feet of grafting tape alongside the wax.
Tree wrap and wound dressing are different products that solve different problems. The 3"×50' Tree Wrap goes around the trunk to protect against sunscald, frost cracks, rodent damage, and trimmer strikes — none of which the wound dressing addresses. Start at the base and spiral up. If you want an additional pest-barrier layer on top of the wrap, the 15oz Banding Gum applies over the wrap and stays tacky through temperature changes. The 4"×150' wrap is the same product at commercial scale — if you're wrapping more than 10 or 12 trees, the economics of the larger roll start to matter.
Oak wilt spreads through two pathways: root grafts between neighboring trees, and sap-feeding beetles carrying spores from infected wood to fresh pruning wounds. Treekote blocks the second pathway. The first — underground root graft transmission — is a different problem that wound dressing can't address. Understanding the distinction tells you exactly when Treekote earns its keep and when the risk is lower.
Nitidulid beetles — sometimes called picnic beetles — are most active when temperatures climb above 50°F and sap is flowing. In most oak wilt zones, that means February through June is the window where every pruning cut on a red oak is a potential infection point. The beetles are drawn to the volatile compounds in fresh oak sap within hours of a cut on a warm day. Texas A&M's oak wilt program has documented transmission occurring within 15 minutes of wounding under the right conditions.
Some counties in Texas, Minnesota, and Wisconsin have mandatory wound sealing requirements for oak pruning during the growing season. Check with your county extension office if you're in a documented wilt zone — the rules vary by location and tree species.
As temperatures drop and trees enter dormancy, beetle activity slows significantly. Late fall and winter pruning on oaks carries substantially lower transmission risk than spring pruning. That said, "lower risk" isn't the same as "no risk" — if you're in a county with active oak wilt pressure and you're making large cuts in early fall before the beetles are fully dormant, applying Treekote is still reasonable. The cost of a can is trivial compared to losing a mature red oak.
White oaks are less susceptible than red oaks — they compartmentalize oak wilt infection more effectively — but they're not immune. The same timing principles apply, just with less urgency.
Dutch elm disease spreads through elm bark beetles by a nearly identical mechanism. If you have mature elms and you're pruning during the growing season, the same application window applies: seal cuts over ½ inch the same day, ideally within an hour or two of cutting. The aerosol formats are the practical choice for in-field application — you're not bringing a tub and brush up a ladder.
One thing that often gets missed: the wound dressing needs to cover the bark-to-wood boundary, not just the center of the exposed wood. That edge is where the cambium tissue is exposed and where beetle entry is most likely.
There's a genuine debate in arborist circles about wound dressings. The skeptical position — and it's not wrong in its general application — is that trees don't need sealants for routine pruning because they compartmentalize wounds effectively on their own. The ArboristSite community sums it up well: Treekote doesn't speed the closure process, but it does reduce the dieback zone, meaning there's less area for the tree to eventually close over. That's a real benefit, but it's not the whole picture.
Google currently surfaces a featured answer to "does tree wound sealer work?" that argues against sealants — claiming they trap moisture and promote rot. That position reflects real concerns about older, rigid asphalt or paint-based sealants applied too thickly. It's also the general consensus for routine pruning on non-susceptible species in low-risk conditions. But it doesn't account for the specific oak wilt and Dutch elm disease use case, where the transmission mechanism is beetles entering fresh wounds — a pathway that a thin, flexible barrier physically blocks. The research distinction matters here, and it's why Treekote's published backing is relevant to the actual buying decision.
The ArboristSite thread on Treekote — one of the longer community discussions about this product — arrives at a conclusion worth quoting directly: Treekote doesn't accelerate wound closure, but treated wounds show less dieback than untreated ones, which means a smaller area for the tree to close over time. That's a specific, measurable outcome. Not magic, not a cure — just a meaningful reduction in the failure zone around a fresh wound.
Dieback is the ring of dead tissue that forms around a wound when the tree fails to compartmentalize immediately. In untreated wounds, that ring can extend a half-inch to an inch or more beyond the original cut margin — which means more surface area, more time to close, and more exposure to pathogens during the closing process. Eaton Brothers' internal studies show treated wounds produce a smaller dieback zone. That benefit compounds over a full pruning season when you're working on multiple trees: less cumulative exposed tissue, fewer opportunities for disease entry.
Here's the failure mode that generates the most negative reviews for wound dressings in general: thick application. When callus tissue forms under a heavy coat of wound dressing, it lifts the product off the wood and creates an air pocket behind the callus — exactly the kind of moist, closed environment where fungal decay thrives. Apply Treekote thin and even. Spray from 8–10 inches with the aerosol and you'll naturally get the right coat weight. With the brushtop, resist the urge to load up the brush — one thin pass, a second if needed. That's it.
Reviews consistently mention the paste getting on fingers and clothing. That's accurate. The asphalt emulsion is dark, sticky when wet, and does transfer. A pair of disposable gloves when using the brushtop or tub format takes care of most of it. The aerosol is cleaner — you're not touching the product directly. For cleanup on skin, the formula removes with standard waterless hand cleaner or citrus-based cleaners. Don't use it in a strong breeze unless you want the overspray somewhere you didn't intend.
The aerosol's push-button nozzle can clog if the can is stored with product in the valve. After each use, invert the can and spray briefly until only propellant comes out — clears the nozzle and prevents the clog that generates frustration six months later when you need it for storm damage. Store away from heat sources; the canister holds pressure and shouldn't be left in a hot vehicle. The brushtop and tub formats store indefinitely at room temperature with the cap replaced firmly. The grafting wax tin should be stored in a cool location — it softens in heat, which is the point, but you don't want it liquefying in a hot shed.
The grafting audience uses Treekote differently than the oak wilt crowd, and the right product choice depends on which side of that line you're on. The wound dressing line — the asphalt emulsion formats — and the grafting wax are not interchangeable tools. They're different formulations for different jobs, and knowing which one applies to your situation saves both product and frustration.
The 8oz Grafting Wax is made from natural wax ingredients at Eaton Brothers' factory outside Buffalo, NY — it's listed as suitable for organic use, which the asphalt emulsion wound dressings are not. The wax is designed specifically for graft unions: it hardens after application to hold the union in position, then cracks and falls off naturally as the union swells and the vascular tissues fuse. That natural release is important — a rigid coating that adheres permanently can restrict growth at the union.
The wound dressing, by contrast, stays flexible and adheres to the wood surface. It works at graft sites in a pinch, and the 8oz aerosol is positioned partly for grafting use given its precision and compact size. But for dedicated graft union sealing on apple, pear, peach, or rose rootstocks, the wax tin is the more purpose-built choice.
Late winter — January through March depending on your region — is when most serious fruit tree grafting happens. Dormant scion wood is collected in late winter before buds break, stored cold, and used for bench grafts or field grafts as rootstocks begin to wake up. The grafting wax should be part of that prep kit. Soften the tin in warm (not boiling) water before use, or work it in your hands until pliable, then apply over the graft union with a brush or fingers.
For summer budding — T-budding on roses or stone fruits in July through August — the wax works the same way. The key difference from spring grafting is that summer grafts are working on actively growing tissue, so the union often takes faster and the wax cracks off sooner.
The growing fruit forums and backyard orchard communities have discussed Treekote products for years. The consistent finding: TreeKote wound dressing painted over grafting parafilm works well for some grafters, though the paste format is messier to work with than the aerosol. The grafting wax tin, on the other hand, gets consistent positive notes for its ease of application once warmed and for the natural release as the union grows. With 583 reviews at 4.4 stars — more reviews than any other product in the Treekote lineup — the grafting wax has the deepest track record of any product Eaton Brothers makes.
If you're new to grafting and want to start right without sourcing three separate tools, the Grafting Kit bundles the 4oz wax, 30 feet of stretchable grafting tape, and an Opinel pruning knife with printed step-by-step photo instructions. The Opinel is a legitimate knife — not a throwaway — so the kit isn't padding; it's a working toolkit. The 4oz wax is smaller than the standalone 8oz tin, which is fine for a season of practice grafts. Once you're doing 20+ grafts a year, the standalone 8oz tin makes more sense on volume.
This short tutorial from Eaton Brothers — the company behind Treekote — walks through the process of applying tree wrap and tree banding gum to protect trees from crawling insects. You'll see the product used specifically for canker worm and gypsy moth prevention, two of the most common pest threats for landscape and garden trees. It's a practical, firsthand demonstration straight from the manufacturer, which means the technique you're watching is exactly what Treekote recommends.
"I've been using Treekote on my red oaks every spring since my neighbor lost two trees to oak wilt five years ago. The aerosol makes it fast — I keep a can clipped to my pruning bucket and coat every cut over half an inch before I move to the next branch. Three pruning seasons, no problems. The nozzle clogged once when I didn't clear it after use, but that's on me. Invert and spray after you're done and it's fine."— David K., homeowner in central Minnesota, oak wilt zone
"I graft about 40 apple and pear trees each February, mostly whip-and-tongue and cleft grafts on my own rootstock. The grafting wax tin is what I use to seal the unions after taping. Warm it in a bowl of hot water for a few minutes and it spreads easily. The wax cracks off on its own once the union starts swelling — I don't have to pick it off. My take rate is around 85–90%, which is about what I'd expect with good technique regardless of sealant."— Susan R., backyard orchardist, Ohio
"We run a tree service and go through six to eight 12oz aerosols a week during spring pruning season. The 6-pack keeps us stocked without ordering every week. Honestly the formula is what it is — it's not complicated — but having it in aerosol means the crew actually uses it consistently instead of skipping the step when they're in a hurry. That's the real value for us. Keep stock on hand or you'll run short in May when everyone's pruning at once."— Marcus T., tree service owner, Texas
"Used the 32oz brushtop on a large storm wound — maybe a 4-inch split where a branch tore away from the trunk on my silver maple. Easy to apply with the built-in brush, covered the whole wound margin in a couple of minutes. The paste does get on your fingers if you're not careful — wear gloves. I don't know if the tree would have healed fine without it, but it's closed over nicely two seasons later with no signs of decay at the wound site."— Linda H., home gardener, Illinois
"My grandfather used Tree Kote. I'm using Tree Kote. That's basically my whole review. He was an orchardist in Ohio who took tree wounds seriously, and when I started my own small planting I didn't question what he used. The 16oz brushtop is what I keep in the barn for routine pruning. Nothing fancy about it — you put it on the cut, it stays, the tree doesn't get infected. Has worked that way for two generations in this family."— James W., small orchard grower, Indiana
"Bought the Grafting Kit as my first attempt at fruit tree grafting. The Opinel knife is genuinely good — sharp out of the box and easy to keep that way. The instructions that come with the kit are clearer than most YouTube videos I found. My first three grafts all took. The 4oz wax in the kit ran out after about 15 unions, so I ordered the 8oz tin for next season. Good starting point if you've never done this before."— Rachel B., first-time grafter, Pacific Northwest
Treekote wound dressing is made from a processed asphalt emulsion — asphalt particles suspended in water, not raw asphalt or liquid asphaltum. The water-soluble emulsion stays flexible after drying and won't damage cambium tissue the way pure asphalt coatings can. The grafting wax is a separate product entirely, made from all-natural wax ingredients at Eaton Brothers' factory outside Buffalo, NY, and is suitable for organic use.
Treekote is a tree wound dressing manufactured by Eaton Brothers Corp., a company that has produced it since 1887. It's an asphalt-emulsion compound that creates a physical barrier over pruning cuts, graft unions, and bark wounds to block disease-carrying insects and pathogens. It's available in eight formats — from an 8oz aerosol to a 1-gallon tub — and is made in the USA. It's stocked by professional arborist supply chains including OESCO, Sherrills Tree, and Gempler's.
For the aerosol: shake the can, hold it 8–10 inches from the wound surface, and apply a single thin, even coat over the entire exposed wood surface and the bark margin. Two thin coats if bare wood still shows — never one thick coat. Apply within 3 days of any cut on oaks or elms during the growing season; same-day application is ideal. For the brushtop formats, work the paste from the wound center outward to the bark edge with the built-in brush. Treat all cuts over ½ inch diameter.
For most routine pruning on healthy, non-susceptible species, wound dressings aren't necessary — trees compartmentalize on their own. The exception is oaks and elms pruned during the growing season, where Treekote blocks sap-feeding beetles that transmit oak wilt and Dutch elm disease. A 2007 study in Arboriculture & Urban Forestry (Camilli, Appel & Watson, Vol. 33 No. 2) specifically named Treekote as effective for oak wilt control — one of the few wound dressings to receive that distinction in peer-reviewed research. It also reduces dieback around treated wounds, meaning less surface area for the tree to eventually close over.
It depends entirely on what "work" means for your situation. Wound sealants don't speed compartmentalization, and they're not necessary for every cut — a healthy tree seals routine pruning wounds on its own. But for oak and elm wounds made during beetle-active months, Treekote's asphalt emulsion barrier physically prevents the nitidulid beetles that carry oak wilt spores from reaching the exposed vascular tissue. That's a documented mechanism, not marketing language. The concerns about sealants trapping moisture apply mainly to thick, rigid coatings — Treekote's emulsion formula stays flexible and allows callus tissue to form naturally beneath it.
Treekote aerosol — 8oz or 12oz — is the right choice for fresh pruning wounds on oaks and elms during the growing season. Apply within 3 days of the cut, preferably the same day, before sap-feeding beetles arrive. For trees not in a wilt or elm disease zone, and for cuts made during dormancy, spraying isn't necessary. The 8oz aerosol is rated 4.7 stars across 403 reviews and is the most precise format for spot treatment of small to medium wounds.
Pruning sealant is unnecessary and not recommended for most routine cuts on healthy trees — the tree's CODIT (Compartmentalization of Decay in Trees) response handles wound closure without assistance. Where it's genuinely beneficial is on oaks and elms in wilt-disease regions during the growing season, where beetle transmission is a real risk, and on graft unions, where the exposed tissue needs protection during the healing window. Using Treekote on every small cut is overkill; not using it on an oak pruned in April in Minnesota is a real gamble.
For oak wilt and Dutch elm disease prevention, Treekote is the only wound dressing cited by name in published research — the 2007 Arboriculture & Urban Forestry study by Camilli, Appel & Watson is the reference professionals use. For grafting, the Treekote 8oz Grafting Wax (natural wax, different formulation) has the deepest review history in the lineup at 583 reviews and 4.4 stars. European alternatives like Lac Balsam are positioned as premium products; Treekote's advantage is documented research backing, US availability, and a product history that spans more than a century.
Topping — cutting a tree's main trunk or large scaffold branches to stubs — causes serious long-term damage that no wound dressing can reverse. The large flat cuts expose massive amounts of wood to decay while producing clusters of weakly attached water sprouts that are structurally inferior to the original branch structure. Trees rarely recover their natural form or structural integrity after topping. Treekote's role is to protect correctly placed pruning cuts — made just beyond the branch collar — not to rescue stubs left by topping. Correct technique comes first; wound dressing protects the result.
Treekote traces its origins to Eaton Brothers Corp., a manufacturer with documented roots going back to 1887 — a time when commercial orchards were central to the Midwest economy and tree wound care was a genuine agricultural concern, not a garden hobbyist category. The brand has appeared under more than one manufacturer name over its history, including references to WalterEClark&Sons in older product listings, which reflects the kind of ownership and manufacturing continuity that's common in American specialty trade products that have survived more than a century. The Amazon store is branded as "Treekote by Eaton Brothers," and the eatonbrothers.com site maintains active product pages today.
The grafting wax product tells you something specific about where this company actually makes its products: the listing states manufacture "at our factory outside of Buffalo, NY" — not a vague domestic claim but a named geography. That's the kind of detail you either know because it's true or you don't include. The product appears in professional arborist supply chains — OESCO, Gempler's, Sherrills Tree, Forestry Suppliers — alongside hardware retailers like Home Depot and Lowe's, which means it has served both the professional and consumer market for decades without being repositioned or reformulated for a different audience. Arborists use the same product as home gardeners. That's not marketing positioning; it's distribution history.
What's kept Treekote relevant through five or six generations of tree care practice isn't nostalgia alone — it's that the core use case never changed. Oaks still get oak wilt. Elms still get Dutch elm disease. Beetles still transmit both through fresh pruning wounds. And the 2007 peer-reviewed citation in Arboriculture & Urban Forestry — naming Treekote specifically in oak wilt control research — gave the product something most of its competitors don't have: documented backing in a journal that ISA-certified arborists actually read. Plenty of wound dressings have come and gone. Treekote is still the one stocked at professional supply chains because it earned that position the slow way.
Treekote is manufactured by Eaton Brothers Corp., a company with production roots going back to 1887. The grafting wax line is produced at their factory outside Buffalo, NY. The company's own site — eatonbrothers.com — maintains active product information, and the Amazon store operates under the name "Treekote by Eaton Brothers." Treekote products are also distributed through professional arborist supply chains including OESCO, Sherrills Tree, Gempler's, and Forestry Suppliers, as well as retail locations including Home Depot, Lowe's, and Menards.
For product questions, the Treekote Amazon store page is the fastest route to current information on availability and specifications. Eaton Brothers can also be reached through eatonbrothers.com. For phone inquiries, contact Eaton Brothers directly. If you're a distributor or professional buyer looking at case quantities — the 12-pack brushtop or gallon tub formats — reaching out through the manufacturer's site is the right path for volume pricing conversations.
All Treekote products linked from this site are sold through Amazon.com. Pricing, availability, and shipping terms are set by the Amazon listing and subject to change — check the current Amazon product page for accurate figures before purchasing. Some formats, including the 6-pack aerosol and the gallon tub, show limited stock periodically; if you need consistent supply for a full pruning season, buying ahead of the February–June oak wilt window is worth considering. No warranty terms are specified in the current product listings; contact Eaton Brothers directly for any warranty or defect questions.