... for high temperature mask1. Size: We can provide you with many different kinds of silicone rubber plug according ... to the drawings or samples which you send to us. 2. Materials: NR, NBR, IR, EPDM, BR, SBR, SIL, ... (natural rubber plug, butyl rubber plug and etc. ). A. Stable airproof performance B. Good anti-aging property C. ... product masking silicone washer plugs for powdercoating in different colors