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 do I cover gaps and cracks? Can Waterproof Sealant be applied to Styrofoam? Can Waterproof Sealant be put on tarred surfaces? Shelf Life How should I prepare the surface before applying Waterproof Sealant? Comments 0 comments Please sign in to leave a comment.