How do I cover gaps and cracks? Liquid Rubber Seam Tape is used to bridge gaps, cracks, seams, vents, protrusions….. Related articles The black surface turns brown when wet? What should I use to clean up? What if I don't want black as my final color? What is Liquid Rubber Foundation Sealant used for? What is Liquid Rubber Seam Tape used for? Comments 0 comments Please sign in to leave a comment.