Boom Mat Flex from Design Engineering is designed to conform to odd shapes and tight bends, allowing it to be used anywhere in a vehicle. This flexible mat can be used in areas with tight curves such as inside wheel wells, fenders or around tubing and pipes. The mat is made of 2.5mm thick Butyl rubber with a clear poly surface and black textured finish.The flexible peel and stick dampening material is available for purchase in packs of two, four or 10. Each section measures 12" by 12" and can be trimmed for exact coverage. The mat is made of 2.5mm thick Butyl rubber with a clear poly surface and black textured finish.