Strips of EPDM closed cellular rubber, cut and slit from large “mattresses”. (Without outer skin).
KISO 458 BUTYL FOAM-CORE is a butyl sealing strip with a highly compressive polyethylene foam core.
KISO 513 DIFF-OPEN-PP-BUTYL is a diffusion open breathable membrane applied with rubber based extruded and self-adhesive butyl sealing strips.