Re: Formula 27
I have used it a couple of times, it is hard as a brick in 20 minutes from the time you mix it and sands like hard steel.
But it says right on the can that it is "semi" waterproof, so you have to cover it with something.....paint, gel coat, resin, bubble gum, something.
I don't think you could do a large area all at once cause it cures so fast.
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