Deck-O-Seal® 125 two-part, pourable joint sealant is a self-leveling, polysulfide-based sealing compound. It is a non-staining sealant which cures to a firm, flexible, tear-resistant rubber. Deck-O-Seal® 125 is highly resilient and has excellent recovery characteristics, even after extended periods of compression or elongation. It has outstanding resistance to most chemicals, to all weather conditions, aging, and shrinkage. For on-the-job use, Deck-O-Seal® 125 is supplied in pre-measured 2.84 L (96 oz.) kits consisting of the base compound and a separate container of the setting agent. There is enough room in the base container for introduction and mixing of the setting agent. Note: Deck-O-Seal® 125 is 25% firmer than regular Deck-O-Seal®.