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 Can Waterproof Sealant be put on tarred surfaces? Can the Earlex Sprayer spray the Original Black Waterproof Sealant? Shelf Life Comments 0 comments Please sign in to leave a comment.