Used to protect surfaces from abrasion, 3M™ UHMW Film Tape 5421 is a thin caliper, general purpose, polyethylene tape that creates a "slip plane" effect to allow contact without wear. This tape features a unique combination of properties that makes it ideal for many tough impact applications. 3M™ UHMW Film Tape 5421 is a thinner version of 3M™ UHMW Film Tape 5423. The effectiveness of 3M™ UHMW Film Tape 5421 lies in its Ultra-High Molecular Weight polyethylene (UHMW) backing. UHMW is a thermoplastic that has a unique combination of properties, such as exceptional hardness and low surface energy. The ultra-high molecular weight of this tape significantly reduces friction to create an effective solution for anti-stick and easy-release requirements. The abrasion resistance of this friction reducing tape is greater than PTFE (Polytetrafluoroethylene) and increases as the molecular weight increases.