| abstract |
A sponge sealing member is provided that includes a composition having a silane-crosslinked polyolefin elastomer with a density less than 0.60 g/cm 3 . The sponge sealing member can exhibit a compression set of from about 5.0% to about 35.0%, as measured according to ASTM D 395 (22 hrs @ 70° C.). The silane-crosslinked polyolefin elastomer can also include a first polyolefin having a density less than 0.86 g/cm 3 , a second polyolefin having a crystallinity less than 40%, a silane crosslinker, a grafting initiator, a condensation catalyst, and a foaming agent. |