PERMASEAL is a fantastic product in many ways. It is a nitrile rubber one-component joint filler and sealer. PERMASEAL is similar in curing time, working properties, and permanent flexibility to the silicone rubber bathtub sealants. It comes in cartridges which fit a skeleton type caulking gun. It is also available in quart and one gallon cans. It converts to nitrile rubber in 18 to 24 hours. It is applied to clean pool and deck joints without a primer.
Kelly Technical Coatings Bulletin 130