How do I cover gaps and cracks? Liquid Rubber Seam Tape is used to bridge gaps, cracks, seams, vents, protrusions... Related articles How should I prepare the surface? Can I go over light rust with MetalSafe Sealant? What if I see blisters? What temperature can I apply Liquid Rubber MetalSafe Sealant? What is Liquid Rubber MetalSafe Sealant used for? Comments 0 comments Please sign in to leave a comment.