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.