Silicone Clear 302 is a general usage, 100% silicone caulking material. The medium modulus one component material forms a non-sag acetoxy cure that is certified by NSF and ensures 50-year durability. The cure forms tough and rubbery upon exposure to moisture in the air, and is water resistant before, during, and after the cure. This product adheres to many substrates, and can be used to seal threaded pipe fittings, chalk around pool skimmers and returns, and much more.