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 What is Liquid Rubber Foundation Sealant used for? Can Waterproof Sealant be applied to Styrofoam? Can Waterproof Sealant be put on tarred surfaces? How come it feels tacky? Is it cured? What temperature can I apply Liquid Rubber Waterproof Sealant? Comments 0 comments Please sign in to leave a comment.