... washers, also different materials of rubber flat wahsers, viton washers, silicone washers, EPDM washers, NBR washers, PU washers, NR washers ... resistant products(hose, seals), high temperature resistant electric wire and cable insulating layer, also used in food and medical industry ... because of no poison and smell.Silicone Flat Washers as below, Duro 60 ...