How do I cover gaps and cracks? Liquid Rubber Seam Tape is used to bridge gaps, cracks, seams, vents, protrusions….. Related articles Will sun have an effect on the Liquid Rubber Waterproof Sealant? The black surface turns brown when wet? What is Liquid Rubber Foundation Sealant used for? Can the Earlex Sprayer spray the Original Black Waterproof Sealant? What if I see blisters? Comments 0 comments Please sign in to leave a comment.