A simple and quick way to waterproof a gutter with EPDM is to choose STRUCTASEAL® self-adhesive EPDM strips. The self-adhesive EPDM strip has a thickness of 1.30 mm and a length of 20 m. It has a glass fibre re-inforcement and a BUTYL adhesive layer on the underside. This adhesive layer has an easy-to-remove protective film. STRUCTASEAL® Self Adhesive is available from Builders Merchants in two sizes: 200 and 500 mm wide.