Abstract: A composite joint sealing gasket (8) includes an elongated flexible, resilient member (10) typically of an elastomer or polymer, for example, elastomer rubber, thermoplastic elastomer or thermoplastic polymer with memory, for example, EPDM or neoprene, and has opposed elongated upper and lower longitudinal edge portions (18, 16); the upper portion (18) defines a sealing element (40, 42); a tacky sealing composition (12), for example, a mastic composition is supported on an outer surface of the lower portion (16) remote from the sealing element (40, 42).

Abstract: A one-part moisture curable polyurethane adhesive composition comprises a blend of polyurethane prepolymers and one or more additives which unexpectedly improve the sag resistance and mechanical properties of the formulation. The final adhesive composition retains good stability in the absence of moisture for an extended period between manufacture and application of the adhesive, and has a relatively rapid and consistent cure rate in the presence of atmospheric moisture. The final cured composition exhibits good mechanical properties and generally is unaffected by ambient application and cure conditions.

Abstract: Isocyanate prepolymer compositions can be cured quickly and thoroughly in the presence of atmospheric moisture by reacting them with a curing system that includes a mixture of (1) an oxazolidine moisture scavenger and curing agent and (2) a hydroxyl curing agent. The oxazolidine moisture scavenger/curing agent can be monocyclic oxazolidine or bicyclic oxazolidine. The hydroxyl curing agent preferably is a polyhydric compound. If desired, an organic solvent, a catalyst, and/or fillers can be used with the invention in order to speed the curing reaction or improve the physical and mechanical properties of the final polymer product. The present invention enables high quality polyurethane/polyurea polymers to be formed in thick layers under various environmental conditions, including humidity, that render the invention suitable for use in the field.