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TotalBoat Aluminum Boat Barrier Coat creates a water-tight moisture barrier to protect aluminum hulls & pontoons from corrosion, fill small imperfections & ensure a solid foundation for antifouling paints or 1 & 2-part topside finishes.
This 2-part, high-build epoxy primer features anti-corrosive properties ideal for protecting underwater metals like lead, bronze, cast iron, stainless & aluminum. Its 3:1 mix ratio is easy to measure, mix & apply. Aluminum Boat Barrier Coat dries quickly and can be overcoated in as little as 3 hours at 90°F, with no sanding required.
Available in Gray (matte finish), in Quart and Gallon kits.
Bonus: Each Gallon order includes a paint roller frame, 3/16 in. nap solvent-safe roller cover, metal tray, stir stick, paint suit w/hood, & 2-in. chip brush. Each Quart order includes a stir stick & a 2-in. chip brush.
|Technical Specifications||Aluminum Boat Barrier Coat|
|Number of Components||2|
|Mix Ratio by Volume||3:1 (3 parts base to 1 part curing agent)|
|Application Method||Brush (natural bristle, solvent safe), roller (3/16'' nap or foam, solvent-safe roller cover), or spray (conventional, airless, or HVLP)|
|Application Temperature||50-95°F; 0-85% relative humidity|
|Induction Period||15 minutes (prior to reduction (optional) and application)|
|Pot Life||2.5 hrs @ 90°F, 5 hrs @ 70°F, 10 hrs @ 50°F|
|Number of Coats||2-3 (minimum); It's important to achieve a total of 8-12 mils DFT|
|Film Thickness Per Coat||4 mils dry (7 mils wet)|
|Coverage||225 sq. ft./gallon (at 7 mils wet, not accounting for waste|
|Recommended Brush||For optimum results, use a high-quality brush with natural bristles|
|Recommended Roller||Use a 3/8" nap solvent-resistant roller cover|
|Recommended for Surface Etching on Bare Aluminum||TotalBoat Aluminum Boat Etch Wash (optional)|
|Reducer/Thinner||TotalBoat Epoxy Primer Thinner 200|
|Surface Prep Solvent||TotalBoat Dewaxer & Surface Prep|
|Cleanup||TotalBoat Epoxy Primer Thinner 200 or TotalBoat Dewaxer & Surface Prep|
Getting primer or paint to stick to aluminum is very difficult, and it's a tedious process that typically entails sanding with very coarse sandpaper or blasting down to shiny, bright metal followed by priming with a specialty primer. The zinc chromate primers commonly used in the past are expensive, and less widely available now due to environmental restrictions. It's also not good for painting underwater metals, because zinc is the stuff of sacrificial anodes!
You can certainly still get excellent results with primer and paint, but the secret lies in etching the surface with the right product. Compare TotalBoat Aluminum Etch Wash to Alodine or Alumiprep 33. Our phosphoric acid-based etching wash is easy to use and works fast to create the toothed surface required for epoxy primer or paint to bond effectively and durably.
IMPORTANT: For best results coating aluminum, if using TotalBoat Aluminum Boat Etch Wash during surface prep, dry the surface completely and apply Aluminum Boat Barrier Coat within 1 hour after metal preparation.
Mixing Note: Combine base and activator components in a 3:1 ratio. If you want to mix the entire contents of both cans, just dump the can of curing agent into the can of base. There's enough room in the larger can to hold all the content of both components. Mix thoroughly, then induct for 15 minutes prior to reduction (if needed) and application.
Application Note: If applying antifouling paint over Aluminum Boat Barrier Coat epoxy primer, apply antifoulant while the primer is tacky to the touch. Do the thumbprint test—touch the barrier coat with your thumb. If the primer doesn't stick to your thumb, but you can make a thumbprint, you are within the overcoat window for applying antifouling paint. If you can't leave a thumbprint, you've missed the overcoat window. Sand with 80-grit sandpaper or apply another coat of Aluminum Boat Barrier Coat. Use the thumbprint method again before applying antifouling bottom paint.
Product Sizes, Color, and Finish
June 15, 2021
I've used the barrier coat for fiberglass boats. This seems the same to me. Works good, builds up quick. Gets super hard. I used it on a 32' pontoon boat. Had to use 2 gallons.
June 3, 2021
Did my boat bottom was leaking.not leaking now in water for 1 week
May 31, 2021
Aluminum boat bottom
May 31, 2021
The quart I got was extremely thick after it was mixed. Also, the solvent in the paint evaporates so quickly that it is almost impossible to lay the product down smoothly. This was while painting in the shade on a 70 degree day. The can I got definitely needs to be thinned to make is useable. I've ordered the 200 thinner and will try it again, after I sand off most of what I've already put down. Ugggh. It does cover real well!
May 26, 2021
Not quite as thick as the fiberglass boat type but ends up being the same
April 20, 2021
Easy to apply, Great coverage and quality finsih
June 25, 2020
It went on great. I like the way it turned out. It is going to be nice bullet proof layer. I did not add brushing paint thinner. I wish I would have added a little paint thinner just so the paint wasn't so thick while working with it.
July 14, 2019
Stuff is awesome. Unfortunately I couldn't cover the boat and had to paint in direct sun. My fault but didn't expect it to dry as quickly. Had my wife tipping it after I rolled it but the epoxy started to cure and started to clump. Not an issue but paint on an overcast day or thin. Went on smooth and there is probably no other paint as good as this. Would give it a 5 if it cured a bit slower.
July 1, 2019
This product is exactly what I was looking for as a barrier coat on an 28' aluminum boat. Applied the product per the directions and the primer has excellent adhesion, cured well and sanded well when I had to apply bottom paint at the location of the boat stands.
June 30, 2019
My aluminum canoe was in need of paint job, first I power washed to remove all loose paint particles, sanded some rough areas and used some BJ Weld to tighten up some of the leaks. Mixed up the TotalBoat Aluminum barrier coat primer (3 to1), it all fit in the quart can, mix well. Used a foam 4" hot dog roller and rolled out the canoe hull. Let dry overnight then applied Total Boat Aluminum Finish Coat (Army Green). A week later took the canoe out into nearby lake and beaver ponds - thus dragging the canoe over logs through weedy areas. After I got home and inspected the hull, it was as if I just painted the hull - no paint scratches or scars. Paint provided excellent protection and proved to have outstanding adhesion.