Sashco Lexel All Purpose Rubber Based SealantLexel: The Ultimate Sealant for Any Project, Indoors or Out! Lexel is the ultimate elastic sealant for any interior or exterior project. Boasting exceptional adhesion to nearly any surface, whether wet or dry, it's immediately waterproof. Lexel's remarkable elasticity allows for 747% maximum joint movement, ensuring it won't crack over time, so you only need to tackle a job once. It is paintable, adheres to itself, and remains crystal clear19 times