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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 62 Reviews

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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March 14, 2022

Good product and there is a difference
By Nanuq Kayaks from Portland, Maine

Verified Purchase

I've been working on a particularly difficult kayak repair in fiberglas. Its difficult because none of the surfaces are flat and all are curved, bending, tilted, etc. I've used and removed three different gelcoats before arriving at Total Boat gel coat, neutral. With a bit of tint we got close to the original, the application was by brush and the product thick enough to avoid pooling and running. Good stuff. Just reordered.

Bottom Line Yes, I would recommend to a friend

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February 6, 2022

Worked perfectly…
By Mitch from Birmingham, AL

Verified Purchase

Made a flawless repair to the keel of my boat. Worked better than the other two brands I tried.

Bottom Line Yes, I would recommend to a friend

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January 13, 2022

Another great product from Total Boat
By V from Florida

Verified Purchase

Neutral gelcoat makes it easier to match.

Bottom Line Yes, I would recommend to a friend

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November 4, 2021

???
By Euro from Madison WI

Verified Purchase

For some reason some ( where used to be holes ) spots would not dried. So I was able to wipe down gelcoat after two days sitting in 70 degree garage See pictures.

You see totalboat primer
Bottom Line No, I would not recommend to a friend

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September 19, 2021

IT WORKS
By hobie 16 from Houston TX

Verified Purchase

gets super hard fast

Bottom Line Yes, I would recommend to a friend

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July 14, 2021

Easy to work with
By Guiseppe from Center Harbor. nH

Verified Purchase

I dented my swim platform and after filling and fairing it was time for Gelcoat. This product sticks and stays to an almost vertical surface. Dries hard and sands with wet dry sandpaper to a smooth finish. Matching the color is the hardest part.

Bottom Line Yes, I would recommend to a friend

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July 3, 2021

Again this was my first fiberglass job. It turned out fine
By Louie from Summit Ms

Verified Purchase

My only regret was ordering paint with the wax mixed in the paint. The first coat didn't go on thick enough. Because the paint had wax in it I had to sand it with 80 grade, de wax and paint again. It all turned out well in the end. I could have saved time by using untaxed for the first coat and added wax in for the second.

Bottom Line Yes, I would recommend to a friend

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