Is this product good for adhering to wood. I'm looking to waterproof a 1/2 whiskey barrel for ponding ? Yes, you're correct. You'll want to bridge any joints, seams with Liquid Rubber Seam Tape. Then build your coats up with the Black Liquid Rubber Waterproof Sealant. Related articles How come it feels tacky? Is it cured? How should I prepare the surface before applying Waterproof Sealant? How long does Liquid Rubber Waterproof Sealant take to cure? Use in Concrete Cistern for Bathing? Can Waterproof Sealant be applied to Styrofoam? Comments 0 comments Please sign in to leave a comment.