EPDM Bonded Sealing washer is matched with the roofing screw and the main function is improving the waterproof efficiency

EPDM Bonded Sealing washer is matched with the roofing screw and the main function is improving the waterproof efficiency. There are many sizes and the different thickness of the washers, such as steel sheet/EPDM Rubber(0.5/1.80, 0.6/2.0, 0.8/2.0, 0.8/2.5 and other pointed thicknesses. The sizes are including 14mm, matching with the 4.8mm series roofing screws, especially the reduced point screws; 16mm, matching with 5.5mm&6.3mm series roofing screws. Other sizes are such as 19mm, 25mm and the special sizes washers.