Large diameter seals

An assembled oil seal including a generally U-shaped metal casing having a pair of radial side flanges, each flange being attached integrally to an axially extending end portion, said metal casing having a first elastomeric component in the form of a seal lip received therein and crimped permanently to each of the interior surfaces of said flanges and said end portion, said seal lip having frusto-conical air and oil side surfaces meeting along a seal band of intended contact with an associated shaft, said seal also having bonded to an exterior surface of said end portion of said casing, a second elastomeric component in the form of a thin, continuous strip of an elastomer, said second elastomeric component having a thickness of at least 0.02 inches and not more than 0.125 inches, said second elastomeric component having both of its end portions permanently bonded to each other, said second elastomeric component being thereby stretched when installed to at least 102% of its length in a relaxed condition.