Polyester Film/Glass Filament Reinforcedwith Acrylic, Pressure-Sensitive AdhesiveData Sheet Excellent conformability High tensile strength High dielectric strength Class B (130°C) UL recognition3M™ Electrical Tape 1339 is a polyesterfilm/glass filament tape coated with apressure-sensitive acrylic adhesivesystem. The polyester film/glass backinghas excellent physical and electricalcharacteristics. The back side of the tapehas a special coating which allows for aneven, controlled unwind. It also promotespermanent anchoring in application.Typical applications for 1339 include leadanchoring, banding of coils, lead tapeanchoring and other uses where tensilestrength is needed.UL Component Recognition Temperatures not exceeding 130°CUL File Number E17385 A and B, GuideOANZ2. Underwriters Laboratories (UL)recognized products have been evaluatedfor use as components of end-productequipment that is listed or classified byUL. To achieve UnderwritersLaboratories recognition, componentconstruction must meet UL specificationsand conditions of acceptability for properand safe use of the component or product.