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? What primer can I use before applying gelcoat? Can Black Diamond Mica Powder be mixed with polyester resins? How do I know if my boat is coated with paint or gelcoat? Why did TotalBoat Gelcoat cure without a glossy finish?