M6 x 28, M8 x 28 BLACK SEALING SELA WASHER CORRUGATED SPAT HOOK BOLT FOR ROOFING
£5.19
Sela Washers used when securing roofing sheets to create a watertight seal. When using spring head roofing nails just a washer is required as the head of the nail will cover the entire washer to provide a watertight seal.
