Product Details

Isophthalic Gelcoats create a durable, shiny finish, and are available with & without wax additive.

Gelcoat with wax makes the final gelcoat layer cure to a hard sandable finish, with no wax paper or special tools needed.

Gelcoat without wax additive is ideal if you're laying up a mold for a new boat or a fiberglass part where you're laying down the gelcoat first, then applying more layers of resin and fiberglass on top. In this case, you don't want the gelcoat to cure completely.

Available in Neutral, White, Black, Light Gray, and Moon Dust. Neutral gelcoat makes bold colors when coloring agents are added. White gelcoat becomes more opaque with coloring agents.

MEKP is included as the catalyst. To thin, use styrene (sold separately).

White is available in Quart and Gallon sizes, with and without wax, Neutral is available in Quart size, with and without wax, and Black, Light Gray, and Moon Dust are available with wax in Gallons only. Wax additive also available for use with gelcoat without wax.

Tech Specs
Amount of Gelcoat w/o Wax Wax Additive Required
1 ounce20 drops
1 pint (16 oz.)1/4 ounce
1 quart (32 oz.)1/2 ounce to 1 ounce
1 gallon4 ounces
Info & Guides
The gelcoat you are buying is an Isophthalic NPG gelcoat with or without wax additive.

The gelcoat without wax is used for layups when you want the initial layer of gelcoat to remain tacky to the touch while you're laying reinforcement plies on top in order to create a strong chemical bond in the laminate. If you use unwaxed gelcoat as the finish coating, you must spray PVA (polyvinyl alcohol) over it or use wax paper or some other means to effect a proper cure.

The gelcoat with wax is used for an air dry post-applied application. The wax additive rises to the surface, making a film that creates an air barrier, allowing the final gelcoat layer to cure properly.


IMPORTANT - Do not Apply Gelcoat Directly on TotalFair:

Gelcoat should not be applied directly over TotalBoat TotalFair epoxy fairing compound or the gelcoat will not cure properly. Instead, apply TotalBoat 2-Part Epoxy Primer or TotalBoat TotalProtect Epoxy Barrier Coat Primer over TotalFair, before applying Gelcoat. Primers are sold separately.

MIXING DIRECTIONSs: NOTE: The higher the percentage of catalyst, the faster the gelcoat will dry. Air and surface temperature will also affect the drying of the gelcoat. The colder the air temperature, the higher the percentage of catalyst you should use.

TotalBoat Gelcoat requires MEKP (methyl ethyl ketone peroxide) catalyst to cure. As with all polyester resin, rate and degree of cure are a function of catalyst concentration and of temperature. Resin and work area should be between 70°F and 95°F to ensure satisfactory results.

At 77°F, TotalBoat Gelcoat requires the addition of 2% MEKP catalyst, by volume: 14-16 drops per ounce, or 2 teaspoons per pint, for a working time of 10-15 minutes. The amount of catalyst may be adjusted in small, incremental amounts, either upward or downward, to account for temperature differences (more for cooler temperatures, and less for warmer temperatures). The acceptable amount of MEKP is 1-3%. Do not use more or less catalyst than this or you may get an improper cure, with laminates exhibiting moderate to severe post cure after demolding. Once cured, the gelcoat can be dewaxed, wet sanded, and buffed.

Tip
If using a wooden mixing stick, place the stick in the resin before adding catalyst so the wood doesn't absorb the catalyst.

Directions for Wax Additive (sold separately)

Wax additive is a mixture of paraffin and styrene. When adding it to gelcoat, you must also add the MEKP catalyst. Wax additive is added to the gelcoat on the final layer of a wet layup to create a tack-free surface that sands easily before applying the finish coating. Wax additive is not needed when additional layers or gelcoat are applied on top. Add 4 oz. of Surface Seal Wax Additive per gallon (20 drops per ounce) of TotalBoat Gelcoat Without Wax. Note that in temperatures below 70°F, the paraffin can solidify in the container. Place the container in the sun or in front of a lamp to liquefy. USE CAUTION - WAX ADDITIVE IS FLAMMABLE!

Wax additive is available in a 4 oz. bottle. Refer to the table below for how much wax additive to add to gelcoat without wax. Too much wax additive will result in fish eye and other undesirable results.

WARNING: This product can expose you to chemicals including styrene, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov

DANGER! Flammable liquid and vapor. Causes skin irritation. Causes serious eye irritation. Harmful if inhaled. May cause respiratory irritation. Causes damage to organs through prolonged or repeated exposure if inhaled. May be fatal if swallowed and enters airways. Wear protective gloves, protective clothing, eye protection, and face protection. Wash with water thoroughly after handling. Use only outdoors or in a well-ventilated area.

Reviews for TotalBoat Gelcoats

10 of 69 Reviews

September 11, 2022

Great product easy to use
By PJ from Michigan

Verified Purchase

Putting a new clear coat on an 1979 28 ft slickcraft so far so good getting good results plan on putting a few more thin coats to get the effect I'm looking for .

Bottom Line Yes, I would recommend to a friend

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August 11, 2022

The consistency is very thin like a paint
By Islote from Florida

Verified Purchase

The consistency of this gelcoat is very thin. I had to used a fairing product to cover a superficial scratch on my gelcoat

Bottom Line No, I would not recommend to a friend

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July 25, 2022

Rokie mistakes!
By Karl from Rorestville, Michigan

Verified Purchase

New to fiberglass and boat repair, I had no idea what I was doing. The Gelcoat worked better than I had imagined and the repair turned out better than I thought it woruld. The next time I have to do some repairs, I will probably re-surface the entire boat.

Bottom Line Yes, I would recommend to a friend

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July 21, 2022

Good product
By Howell from Fairhope, AL

Verified Purchase

Used on fiberglass repair.

Bottom Line Yes, I would recommend to a friend

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July 12, 2022

First time using gelcoat, good results.
By kayakingbob from Lamoine Maine

Verified Purchase

Final topcoat product. I did not know this when I bought it, so after first application I sanded it down to get a good bonding surface for the gelcoat without wax, and put on 3 layers. Final coat was the gelcoat with wax. Since my objective was to protect the bottom of a kayak and learn about fiberglass and gelcoats for the future I sanded the areas above the waterline smooth and left the heavier bottom with brush strokes.

Bottom Line Yes, I would recommend to a friend

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June 22, 2022

You need to know what you are doing before doing it!
By Jim from Austin TX

Verified Purchase

The product is good, the guidance is poor. I have a PWC (Seadoo) that needed its bottom restored. I decided it needed new gelcoat. After watching several YouTube clips on how to apply and finish gelcoat I decided I could do this. I have experience spraying cars and trucks. I spoke with the sale lady and explained I needed to cover about 30 square feet with black gelcoat. She explained the prep steps, how to roll on the gelcoat and how to sand it down before applying the second or third coats. The sanding was necessary because she sold me a gallon of gelcoat with wax. I thought a gallon was overkill based on auto painting but I assumed she knew what she was doing. Also, rolling is a bad idea because it leaves it not with orange peal but grapefruit peal and it takes forever to sand it down due to the various contours of the surface. I could use my mechanical sanders on about half of the hull. After the first rolled coat I sprayed the next coats with great success. It does not level well and still needs sanding but nothing like the roller. Later when I asked why she didn't recommend the first coats using gelcoat without wax she explained that they didn't sell black gelcoat without wax and assumed I could sand it down for the subsequent coats. She should have warned me that would be really hard. After 10 minutes to spray a coat it took a couple days to sand it down for the next coat or for the finish polishing. In the end, the bottom came out looking almost new but it took 10 times longer to do than I expected. My recommendation: If you need multiple coats then do the undercoats without wax then finish off with wax. Furthermore, she sold me a whole gallon and I only used a little over a quart. Anyone want some black gelcoat with wax?

After
Before
Bottom Line No, I would not recommend to a friend

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May 28, 2022

Gelcoat repair
By Rick from Redding California

Verified Purchase

Worked great, color was way to white for my project, but will work for my 1992 Snugtop truck camper. Thank You

Bottom Line Yes, I would recommend to a friend

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May 23, 2022

Quality Gel Coat
By craigesk from Portland, OR

Verified Purchase

I have applied this gel coat to my 14 ft sailboat and am happy with the results.

Bottom Line Yes, I would recommend to a friend

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March 22, 2022

yes
By New whaler owner from LA, CA

Verified Purchase

I use this to repair my boat. End product looks good. More on what I wonder. The first quart works fine. I don't use it all at once, but rather a little bit at a time. By the end of the quart, the gel coat get a little more concentrated, still works fine. This was in hot summer. On the second quart I ordered in the cold weather, the first batch is fine. Second batch get a lot more concentrated only roughly 2 weeks after the first time opened.

Bottom Line Yes, I would recommend to a friend

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March 15, 2022

I would buy this again
By Van from NC

Verified Purchase

Works very well. I mixed too much (12 oz) the first batch and it hardened before I could finish rolling it out. After that I stuck to 6 oz batches & a few drops less of hardener.

Bottom Line Yes, I would recommend to a friend

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