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 long does Liquid Rubber Waterproof Sealant take to cure? Does the product have a detrimental impact to fish or aquatic plants? Is Liquid Rubber Waterproof Sealant safe for drinking water? Can I build my final membrane all at once? Use in Concrete Cistern for Bathing? Comments 0 comments Article is closed for comments.