1-5-27 (PK-2)

3M™ Glass Cloth Electrical Tape 27 with Thermosetting Rubber Adhesive Data Sheet Product Description May 2021 3M™ Glass Cloth Electrical Tape 27 is a white, 7.25-mil (0.184 mm) thick tape composed of a 5-mil (0.127 mm) glass cloth backing coated on one side with a thermosetting rubber pressuresensitive adhesive.  Commonly used in 600-volt dry, coil outer wrapping and insulating motor lead connector applications  Adhesive requires no heat, moisture or other manner of preparation to affect application  Designed for continuous operation not exceeding 150°C (302°F) UL listing, 130°C (266°F) CSA listing  Properties Value Imperial (Metric) White Physical Properties Color - Visual Electrical Properties Comparative Tracking Index (CTI)3 Adhesive Thermosetting Rubber Dielectric Breakdown1 - Minimum Backing Electrolytic Corrosion Factor2 Adhesion to Steel1 - Minimum Glass Cloth Value Imperial (Metric) 5 mil (0.127 mm) 7.25 +/- 1.25 mils (0.184 +/- 0.032 mm) 38 oz/in (4.2 N/cm) Breaking Strength1 - Minimum 120 lb/in (210 N/cm) Mechanical Properties Backing Thickness - Nominal Total Thickness1 Notes: 1. 2. 3. Insulation Resistance1 - Minimum Value Imperial (Metric) I 2725 V 0.9 50x106 Ω ASTM D1000 Test Method - properties measured at room temperature 73°F (23°C) unless otherwise stated 3M Test Method ETM-54001 – 0.9 value means tape or backing may promote corrosion UL tested and meets the listed UL840 Material Group when tested to IEC 60112 on both sides of the tape Agency Approvals & Self Certifications  UL Component Recognized: UL510A Standard, Category OANZ2, File No. E17385  CSA Certified: Standard C22.2 No. 66, File No. 093411, Class 9052-30  For Regulatory information including RoHS, REACH, please visit www.3M.com/regs Shelf Life & Storage This product has a 5-year shelf life (from date of manufacture) when stored in humiditycontrolled storage (50°F/10°C to 80°F/27°C and