Abstract: A tire sealant system in accordance with the present invention includes a tire sealant powder, a water-soluble bag which hermetically encloses the powder and a predetermined volume of water corresponding to the amount of enclosed powder. The powder comprises a plurality of heavy metal inorganic salts, a plurality of crystalline silicate clays and a plurality of mica particles. The water-soluble bag is made a polyvinyl alcohol (PVOH) polymer. For deployment in the repair of a puncture in a tire, a tire bead is separated from the wheel rim. This establishes a gap between the bead and the rim, and the water-soluble bag (and enclosed sealant powder) is inserted through the gap and placed in the tire well. Next, the predetermined volume of water is poured through the gap into the tire well. The bead is remounted to the rim, and the tire is inflated. The bag dissolves in the water, and the powder contacts the bag to form an aqueous suspension.

Abstract: An improved tire sealant containing a hydratable salt and clay such as barium sulfate and sodium bentonite and a substantial portion of a plate like mineral such as mica. Improved suspendability and sealing performance in the presence of an alkylene glycol antifreeze such as propylene glycol is provided by an anionic thickening agent such as carboxymethylcellulose and mica flakes having an amount of both large and very fine sized particles.