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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, Light Gray, and Black. 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; Light Gray and Black 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 in the Tech Specs section 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 Marine Gelcoats

10 of 80 Reviews

June 10, 2024

Solid product for solid results
By Sandlapper from West Point, VA

Verified Purchase

I use this as the finishing coat as I'm redoing some gelcoat work on my 1998 Wellcraft. I have also used it with glass fibers as a gelcoat putty with success.

Bottom Line Yes, I would recommend to a friend

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June 3, 2024

Great stuff
By Sailer from Montana

Verified Purchase

I re-coated an accent stripe on my boat. This worked really well, was easy to use and there are great how to videos on the web site. I used un-waxed gelcoat for 3 lairs and then added the Fiberlay surfacing additive for the 4th. It hardened right up and looks great. I used a roller and it left stipple so if you want it smooth you will need to sand and polish it.

Bottom Line Yes, I would recommend to a friend

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March 22, 2024

If only!!
By Kit from Rockwall Tx

Verified Purchase

I would love to give a great review on this product but Jamestown distributors does a lousy job at sending out good product on neutral without wax. Well I continously get this product that is congealed and needs mixing that a mixing paddle in a drill won't fix, particularly if you want to spray this on. I have reached out to them on this matter and they were nice enough to send out two replacement quarts but they were just as bad. They should be checking this and mixing this before they ship it out. Sometimes when I'm lucky I get a fresh can and it's so nice to work with but it's rare. What I've done since was to purchase a kitchen blender with a glass jar to mix it with and that can get it creamy but they should either be forth coming on this issue, either mix it at their shop or at least have someone in quality control open the cans and examine the contents because there is no tutorial on working with this stuff otherwise. I like using the no wax as I don't have to rush getting additional layers down without cleaning and wet sanding. However when they send out good premixed stuff it's great. I'd like for them to send out a can of this crappy stuff to the guy who does there youtube how-to videos so we can at least see how we're supposed to spray this on since I haven't been able to find any. And if you want to spray this on you will have to mix it so you better ask Paul what to mix it with to thin it out.

Is what it is
Hard to work with
Bottom Line No, I would not recommend to a friend

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October 20, 2023

boat products
By erich from sequim washington

Verified Purchase

at one time in my life i worked building sailboats from scratch. blue water boats taught me a lot. fast forward 50 years and i am re gel coating my kayaks. came across some videos and decided to use total boat products. something that works like it is advertised for is amazing, found a new product that works.

Bottom Line Yes, I would recommend to a friend

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June 28, 2023

this stuff sucks
By island guy from nantucket

Verified Purchase

this stuff sucks, very thin , can't build it up, won't dry over fillers etc. avoid this product

Bottom Line No, I would not recommend to a friend

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May 3, 2023

Great gloss
By Alex from Trinity NC

Verified Purchase

I love it! I never work with gelcoat before so like I was hopping I did make some mistakes but once I did get it I did the job easily and the final is gorgeous.

Bottom Line Yes, I would recommend to a friend

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March 31, 2023

I liked this product so much I bought it a second time!
By BP from Santa Cruz, CA

Verified Purchase

I used this product for an under-deck hull repair project. I used Total Boat's product support advice and had no problems and ended up with a perfect glossy finish.

Bottom Line Yes, I would recommend to a friend

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January 16, 2023

I would buy this product again
By None from Monterey, ca

Verified Purchase

Easy to use for first timer


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December 19, 2022

always dependable when following the instructions
By shane from chico ca

Verified Purchase

I love this product


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November 22, 2022

Yes
By Steve from Nj

Verified Purchase

I have to say I am happy with all total boat products easy to apply great results

Got to look good
Bottom Line Yes, I would recommend to a friend

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