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 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 long does Liquid Rubber Foundation Sealant take to cure? How should I prepare the surface? What is Liquid Rubber Foundation Sealant used for? What if I don't want black as my final color? Comments 0 comments Please sign in to leave a comment.