How do I cover gaps and cracks? Liquid Rubber Seam Tape or Geo-Textile is used to bridge gaps, cracks, seams, vents, protrusions... Related articles How should I prepare the surface? How long does Liquid Rubber Foundation Sealant take to cure? What is Liquid Rubber Foundation Sealant used for? I'm looking to seal my cement interior floor before putting on sub floor. What is the prep before applying and how is the Odor? How does it seal? Comments 0 comments Please sign in to leave a comment.