Sealant compositions and sealed electrical connectors

A moisture and temperature resistant electrical connector for sealingly connecting transmission means comprising:

• (a) a connector body comprising terminal means for accepting and electrically connecting with said transmission means;
• and
• (b) a sealing and lubricating composition disposed along or adjacent to said terminal means for providing low-temperature sealing and wire-insertability to the connector, said composition comprising an elastomeric thermoplastic polymer, said elastomeric thermoplastic polymer being elastomeric at temperatures of from about -40.degree. C. to at least about +150.degree. C. and flowable yet thermally stable at temperatures of from about +200.degree. C., said elastomeric thermoplastic polymer comprising at least one elastomeric block and one non-elastomeric block, and said elastomeric thermoplastic polymer comprising a composite of a first elastomeric thermoplastic polymer and a second elastomeric thermoplastic polymer, the melt viscosity of said second elastomeric thermoplastic polymer being at least about 50 times greater than the melt viscosity of said first elastomeric thermoplastic polymer, and an extender for said polymer, said extender comprising a major proportion by weight of said composition and said extender comprising an extender having a secondary swelling percentage at about 60.degree. C. of at least about 700% in a poly(styrene-ethylene-butylene-styrene) tri-block copolymer, wherein said composition has a slump resistance at about 80.degree. C. of less than about 0.5 inches, a low-temperature cohesive strength at about -22.degree. C. of no greater than about 0.01 g and a low-temperature wire insertability at about -22.degree. C. of no less than about 80.times.0.1 mm.