... as a replacement of asbestos, PTFE gaskets is anti-creeping, anti-cold-flow, anti-low-temerature, PTFE gaskets has no pollution. PTFE gaskets is easy to install ... Filled PTFE Gasket has strong corrosion resistance and friction-resistance, By adding filler such as fiberglass, carbon fiber, copper powder, graphite ,MOS2 ... valve, bearing, slide, pistion ring, insulating sleeve, and self-lubricating seal.