Can TotalBoat Gelcoat be applied to concrete? Eric Boudreau April 01, 2022 14:55 Updated TotalBoat Gelcoat should never be applied to concrete, as it will not be able to form a viable bond to the substrate. Related articles When applying TotalBoat Gelcoat without Wax, what is the overcoat time? Can TotalBoat Polyester Resin be applied over ABS plastic? Can Black Diamond Mica Powder be mixed with polyester resins? Why did TotalBoat Gelcoat cure without a glossy finish? What primer can I use before applying gelcoat?