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Product Details

TotalBoat Epoxy Primers provide excellent finish adhesion & corrosion protection on fiberglass, steel, wood & aluminum. Surfacing Primer is ideal for surfaces that are ready to be topcoated. It ensures adequate filling & lets you build up to 12 mils wet in 3 hrs. High Build Primer has a denser formula to fill pinholes & small surface defects without extensive fairing or applying a surfacing primer over it. Both primers have a simple 1:1 mix ratio, easy application by brush, roller or spray, fast dry times, optimal sanding qualities & can be overcoated with 1- or 2-part urethane coatings.

Primers are available in Gray & Off White, in Quart and Gallon Kits. Quart Kits include 1 Qt Base & 1 Qt Activator. Gallon Kits include 1 Gal Base & 1 Gal Activator.

Bonus: Each order includes 2 mixing pots, 2 10 in stir sticks, 2 2 in foam brushes, and 2 paint strainers.

Tech Specs
Technical Specifications Surfacing Primer High Build Primer
Usage For overcoating, color matching, and improving adhesion For improving adhesion of topcoats, and filling pinholing and other minor surface defects.
Application Temperature 45-125°F 45-125°F
Mix Ratio (Spray/Brush/Roller) 1:1 1:1
Induction Time 30 minutes 30 minutes
Number of Coats 1-3 1-3
Film Thickness (per Coat) 3-4 mils wet 3-4 mils wet
Pot Life (@ 72°F) 8 hours 8 hours
Dry Time to Recoat 1-3 hours 1-3 hours
Dry to Sand (Single Coat) 4 hours 4 hours
Dry to Sand (<4 mils) 4-16 hours at 72°F 4-16 hours at 72°F
4 mils) 16 -24 hours at 72°F 16 -24 hours at 72°F
Recommended Finish Urethanes Urethanes
VOC Content (Admixed) <420 g/L <350 g/L
Theoretical Coverage 400 sq ft/gal @ 2 mils dry 75-100 sq ft/gal @ 3 mils dry
Surface Prep Cleaner/Reducer/Thinner TotalBoat Epoxy Primer Thinner 200 TotalBoat Epoxy Primer Thinner 200
Epoxy Primer Thinner 200 Data
Induction Period: Allow an induction period of approximately 30 minutes prior to reduction and application.
Info & Guides
TotalBoat 2-Part Epoxy Primers are for marine use prior to the application of a topcoat. Their VOC levels of <420 g/L (Surfacing Primer, admixed) and <350 g/L (High Build Primer, admixed) meet all current guidelines.

The recommended thinner is TotalBoat Epoxy Primer Thinner 200 (sold separately) formulated to extend wet film flow, especially when applying primer through a spray nozzle. This reducer can also be used as a surface prep cleaner, and as a solvent for cleaning equipment.

Surface Preparation

Fiberglass/Wood: Abrade with 100-150 grit sandpaper. Solvent wipe with TotalBoat Epoxy Primer Thinner 200 to remove surface contaminants. Follow with a dry, clean, lint-free cotton rag, and allow to dry completely.
Steel: Sandblast or grind to SSPC-6 Commercial Blast. Remove residue with a vacuum or air hose, solvent wipe with TotalBoat Epoxy Primer Thinner 200, and allow the surface to dry completely.
Aluminum: Sandblast, grind, or sand the surface with 100-150 grit sandpaper, then use TotalBoat Aluminum Boat Etch Wash, as directed. Dry the surface completely and apply TotalBoat 2-Part Epoxy Primer within a maximum of 4 hours.
Previously Primed or Painted Surfaces: Ensure that the substrate is a 2-component system. If no corrosion byproducts are present, abrade the surface with 100-150 grit sandpaper to remove gloss. Wipe away any surface contamination with a lint-free rag wetted with TotalBoat Epoxy Primer Thinner 200. Follow with a clean-dry, lint-free rag to ensure no contaminants were spread or left behind.

Mixing

Shake or stir the primer base well such that no material is settled on the bottom or sides of the can. Mix 1 part primer base with one part primer activator by volume. Allow an induction period of approximately 30 minutes prior to reduction and application. See Epoxy Primer Thinner 200 data (below) for details on thinning the product, if desired.

Application

Spray Application: SURFACING PRIMER: After induction period, reduce 15-25% with TotalBoat Epoxy Primer Thinner 200 for desired application and film thickness control. Coats can be applied at 3-4 wet mils building up to 12 wet mils thick, waiting 1-3 hours between coats. For single-coat application (3-4 wet mils). it can be sanded after 4 hours. HIGH BUILD PRIMER: After the induction period, for desired application and film thickness control, reduce 15-25% with TotalBoat Epoxy Primer Thinner 200. Apply with a 1.8-2mm spray tip. Coats can be applied at 3-4 mils wet each, building up to 20 wet mils thick, waiting 1-3 hours between coats. For single-coat application (3-4 mils wet), it can be sanded after 4 hours.

Roll/Brushing Application: Thinning should not be needed, but if reduction is desired for flow, use TotalBoat Epoxy Primer Thinner 200. If rolling, use only 1/8-inch nap epoxy/solvent-safe foam rollers. Subsequent coats can be applied every 1-3 hours, up to 12 wet mils thick (Surfacing Primer) or 20 wet mils thick (High Build Primer).

Sanding

For multiple-coat application, after the final coat, allow 16 hours to cure before sanding. If possible, do not wait more than 24 hours to sand, especially with only one or two coats, as the primer will get increasingly harder. Use 220-grit or finer sandpaper for optimum topcoat appearance.

Precautions

Use with adequate ventilation and proper respiratory protection. See SDS for complete details of composition and precautions.

Warning: Do not apply paint materials to surfaces less than 5°F above dew point, or to surfaces warmer than 125°F. Ambient air and surface temperatures should be above 45°F and below 125°F.

Technical Information

<b>2-Part Epoxy Primer Features</b>

  • Aerospace coatings-grade epoxy-polyamide formula provides superior adhesion.
  • Improves the gloss and structural integrity of topcoats.
  • Easy to apply by brush, roller, or spray nozzle without the need for extra thinner.
  • Fast drying and easy to sand.
  • Can be applied at temperatures 10 degrees cooler than leading brands.
  • VOC levels meet all current guidelines.
  • Surfacing Primer offers adequate filling and lets you build up to 12 mils wet in 3 hours.
  • High Build Primer features superior filling and hiding properties to hide pinholing. Lets you build up to 20 mils wet in 3 hours.

<b>2-Part Epoxy Primer Kit Contents</b>

  • Epoxy Primer Base (Gray or Off White)
  • Epoxy Primer Activator/Hardener (Surfacing or High Build formula)
  • 2 Quart Size Plastic Mixing Pots
  • 2 10" Wooden Stir Sticks
  • 2 2" Foam Brushes
  • 2 Paint Strainers

<b>Surface Prep Cleaner/Reducer/Thinner</b>

  • TotalBoat Epoxy Primer Thinner 200

Reviews for TotalBoat 2 Part Epoxy Primers

10 of 22 Reviews

August 9, 2021

2 part epoxy primer
By Rob from Westtown NY

Verified Purchase

It works as described. Just follow instructions and use with the compatible product.

Bottom Line Yes, I would recommend to a friend

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June 16, 2021

Great Product
By David from Atlanta

Verified Purchase

I am a first timer restoring an old family boat. After much patching and fairing, I used the 2 part hi-build primer which worked great. Thinking I would use the TotalBoat Topcoat I went over that primer with the 1 part TotalBoat primer. Then I found out that TotalBoat doesn't mix custom colors and decided to use Alexseal 2 part topcoat. Even though the 1 part primer says "compatible with 1 and 2 part topcoats" I found out it comes off when you put the Alexseal over it. I had to sand off ALL of that 1 part primer and go with the 2 part TotalBoat primer that I am reviewing here. I love this primer because it is easy to roll and sands to glass smooth finish with a 320 grit. I have tried to rub it off with every solvent I can find and it doesn't go anywhere. I highly recommend this primer but have to warn against the 1 part TotalBoat primer.

Bottom Line Yes, I would recommend to a friend

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January 28, 2021

White is MUCH more difficult to sand than GREY
By Charlie from Paso Robles CA

Verified Purchase

First I need to say that I LOVE this stuff in GREY - I went with high build grey and can say it is fantastic (and actually worth the cost). It goes on great (although I did find it needed a bit of thinner to get it to roll and tip well) - the best part is it's "sand-ability". The grey primer builds fast, fills quickly and best of all sands very well with a hand (block) or with random orbit. I went for an overcoat of my prep'd grey surface (sanded about 80 grit) - just needed a final coat to fill grain. I went with the white (same catalyst) to make it easier to overcoat with a light color paint. I found that the white is MUCH harder and is far more difficult to sand. I will NOT buy the white primer again (the difficulty in sanding makes it just about value-less for me - so it's an expensive lesson!!!) Sorry J'town, but it does not perform nearly like the grey. I got in touch with J'town and they acknowledge it is harder to sand and recommend sanding very soon after application. SO ---- only 1 star for the White....I will have no use for the remainder of the paint - so it's a "throw away" of about a hundred bucks.....All that said, I WILL buy the grey in the future. I honestly think that it should not be in the product line-up. (or at the very least make it very plain that it is nowhere near the performance of the grey!). Makes me sad to have to give this stuff a bad rating - but honestly I'd stay away from it, makes a lot of extra work.

Bottom Line No, I would not recommend to a friend

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January 11, 2021

high quality high build
By Nate from Canton, CT

Verified Purchase

I reduced and sprayed with a gun with a 2.0 tip and got desirable results. Put one coat on some areas and three on others. Waited until next day to sand, Started with 120 on a large fairing board. Sanded well. Two quart kit marginally enough to do 12 ' hull.

Bottom Line Yes, I would recommend to a friend

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August 5, 2020

Works well.
By Restoration Transportation from San Diego, CA

Verified Purchase

In retrospect I should have used the Fiberglass Surface Prep on the outside of the canoe. I thought I had sanded literally every surface but there were a few small spots of virgin that the primer didn't adhere to. No big deal, but understand this isn't a stick-to-anything etching primer. Sprayed using the twice-dreaded Harbor Freight $15 gun, thinned 20%. It sprayed well with little orange peel and good coverage. I obtained 186 sf of coverage in three coats. It sanded easily, very similar to West 410, maybe even easier. (I sanded the first two coats with 150, then the last coat with 220.) DOES NOT FILL PIN HOLES. Get that out of your mind. All pinholes must be filled before application, although they're much easier to see after application. (That's why I did 2 coats, sanded, then the last coat.)

Bottom Line Yes, I would recommend to a friend

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July 20, 2020

Never
By Robert from Blaine WA

Verified Purchase

This set my project back a week. It claims to be brushable, it came out like driftwood grain. I had to sand all of it off. It did not sand well. I bought interlux primer when I finished stepping off the total boat primer

Bottom Line No, I would not recommend to a friend

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July 6, 2020

Seems Like a Good Product
By Bird from Mystic

Verified Purchase

Product went on easily and cured to a strong finish. I mixed the whole kit at once and had more than I needed. I haven't not finished painting yet - so I can't say how well the paint will adhere. The primer sanded up nicely, so I think it'll be ok.

Bottom Line Yes, I would recommend to a friend

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June 8, 2020

Almost impossible to mess up
By Max from South jersey

Verified Purchase

Used as a sealer on transom after fairing and primer filler sprayed 3 coats an hour and a half apart blocked with 400 the next day and sprayed with awlgrip 2000 looks beautiful

Bottom Line Yes, I would recommend to a friend

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November 12, 2019

Leaves a fine finish.
By Mike from Bennington, VT

Verified Purchase

I use the high build primer on a regular basis. The trick that works for us is to roll on a thin tack coat and then come back a few min later with the build coat. Sands reallly well. It can be tough to mix. Home Depot sells a small paddle wheel mixer in the drywall department that works great. I cut the mixer's shaft down a little bit to make it easier to handle.

Bottom Line Yes, I would recommend to a friend

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November 1, 2019

Shipped with incorrect thinner
By Jerry from Charlotte, NC

Verified Purchase

I've yet to use the primer but had the local Lowe's shake the can before opening it to help alleviate mixing concerns. BIG Caution - be sure you read and select the correct thinner; the package came all neatly bundled but included the WRONG THINNER. Customer service sent me the correct quart aptly named "2-Part Epoxy Primer Reducer" The 5 star rating is presently for the great customer service/tech advisor's response.

Bottom Line Yes, I would recommend to a friend

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