DECK-O-SEAL two-part, polysulfide-based joint sealant is a premium-grade, pourable, self-leveling sealant. It is a non-staining sealant that cures at an ambient temperature to a firm, flexible, tear-resistant rubber. DECK-O-SEAL is highly resilient and has excellent recovery characteristics after extended periods of compression or elongation. DECK-O-SEAL has outstanding resistance to most chemicals, to all weather conditions, aging, and shrinkage. USES DECK-O-SEAL is used for caulking and sealing joints subject to concrete movement to provide a firm, flexible, weather-tight seal. It is ideal for sealing joints on swimming pool decks. It is applicable for both interior and exterior use. FEATURES/BENEFITS: Highly resilient with excellent recovery characteristics. Provides permanent and uniform watertight seal. Prevents uncontrolled cracking by allowing expansion and contraction during temperature changes. Stays flexible and won't become brittle or crack due to ultraviolet exposure. Resists abrasion, weathering and moisture - elevated temperatures will not cause discoloration. Not affected by pool chemicals. Retains joint soundness in service once it's cured and can be stretched or compressed up to 25%.