Dyneon TF 2021 PTFE Polytetrafluoroethylene 3M-Dyneon Fluoropolymers SEALANT Dyneon™ PTFE Fine Powders Dyneon offers a family of PTFE fine powder paste extrusion resins. These products are well suited for a variety of applications, including tubing, hose, pipe liners, tapes, wire and cable, diaphragms and textile/fiber. Available grades are designed to balance process properties such as reduction ratio, and performance properties, such as tensile strength, shrinkage, flex life and permeations. Dyneon™ TF 2021 can be processed at low to medium reduction ratios. Dyneon TF 2021 PTFE fine powders for unsintered thread sealing tapes, joint sealants and pipe liners Processable by standard paste extrusion methods Both grades can be processed at low to medium reduction ratios TF 2021 PTFE is preferred for unsintered thread sealing tapes and expanded joint sealants PTFE fine powder paste extrusion resins. Used for unsintered thread sealing tapes and expanded joint sealants. Can be processed at low to medium reduction ratios.