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 Can Black Diamond Mica Powder be mixed with polyester resins? When applying TotalBoat Gelcoat without Wax, what is the overcoat time? Why did TotalBoat Gelcoat cure without a glossy finish? What's the difference between gelcoat with wax and without wax? Can TotalBoat Polyester Resin be applied over ABS plastic? Comments 0 comments Article is closed for comments.