Virgin PTFE is white flexible material that exhibits tremendous tensile strength, very low coefficient of friction, excellent high and low temperature capability, and is resistant to virtually all acids and caustics. It is flexible and extremely soft, and therefore conforms to irregular flanges effectively. PTFE also exhibits extemely high physical & electrical insulation characteristics, and has increased resistance to creep (compression) under load. Compared to Virgin PTFE, Reprocessed PTFE is less expensive, has lower tensile of 2000 PSI, and has reduced resistance to cold flow. On the other hand, Glass Filled Virgin PTFE has 50% greater resistance to cold flow. Virgin PTFE is compared to Mechanical Grade PTFE.