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Product Details

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.

Tech Specs
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
Info & Guides

Why Should I Etch My Aluminum Boat Before Priming and Painting?

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.

Technical Information

Features

  • Creates a moisture-resistant protective barrier against corrosion on aluminum hulls, pontoons, and underwater metals.
  • High-build formula fills small imperfections.
  • Serves as an excellent tie coat that provides maximum adhesion for antifouling bottom paint or other 1-part and 2-part paints.
  • Easy to use, with a simple 3:1 mix ratio that ensures great results.
  • Dries quickly and can be overcoated in as little as three hours @ 90°F without the need for sanding.
  • Easy to apply by brush, roller, or spray equipment.
  • Comparable to other high-build marine epoxy barrier coatings.

Product Sizes, Color, and Finish

  • Size: Each Quart Kit includes 1 quart base component & ½ pint of curing agent
  • Size: Each Gallon Kit includes 3/4 gallon base component & 1 quart of curing agent
  • Color: Gray
  • Finish: Matte

Reviews for TotalBoat Aluminum Boat Barrier Coat Primer

10 of 17 Reviews

July 16, 2021

Good Job
By Skip from Mansfield Ohio

Verified Purchase

This turned out to be a very good experience for me. My boat turned out great!


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June 15, 2021

Pretty good I think
By Beerbug from Leesburg, FL

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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June 3, 2021

Good stuff
By Tom from Chittenango ny

Verified Purchase

Did my boat bottom was leaking.not leaking now in water for 1 week

Bottom Line Yes, I would recommend to a friend

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May 31, 2021

Excellent product
By Jim from Jersey shore

Verified Purchase

Aluminum boat bottom

Bottom Line Yes, I would recommend to a friend

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May 31, 2021

Buy the Thinner Too!
By Capt. Fred from NE North Carolina

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!

Bottom Line No, I would not recommend to a friend

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May 26, 2021

Does what it's supposed to
By Beerbug from Florida

Verified Purchase

Not quite as thick as the fiberglass boat type but ends up being the same

Bottom Line Yes, I would recommend to a friend

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April 20, 2021

I will NEVER buy anything else!!!!
By Marina Life from Dale Hollow

Verified Purchase

Easy to apply, Great coverage and quality finsih

Bottom Line Yes, I would recommend to a friend

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June 25, 2020

Nice and think
By Captain Ryan from Iowa

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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July 14, 2019

Drys quickly
By Adam from New Jersey

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.


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July 1, 2019

TOUGH STUFF
By okant from Middlebury, VT

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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