<p>#1 Selling PTFE | 100% PTFE (fibers, fillers and particles). Organic carrier. Brown color. Good travel. High fiber concentration for good bridging. Excellent resistance to most solvents and acids (not for use on oxidizing chemicals). Shelf life is 2 years in closed containers. </p><h2>Applications</h2><p>Packing and sealant for valves, flanges and enclosures.</p>