Item Description: Maretial: Synthetic Butyl Rubber Color: Balck Item Length: 8m 26ft. Item Thickness: 9mm 0.35'' Features: Rubber Sealant is a black, non-drying, non-hardening synthetic rubber based butyl rubber sealant suitable for use as a placement sealant tape for re-sealing headlights after a retrofit or for installation between the glass and metal/llastic areas of automotive headlights/windscreen. It will remain permanently sealing and waterproofing. .