3M glass cloth electrical tape 69 is a white glass cloth tape with a high temperature thermosetting silicone pressure sensitive adhesive. It is designed for use in 600V dry location applications motors and transformers with and without varnish coating. Key attributes like high mechanical strength and resistance to high temperatures provide excellent performance. - The thermosetting adhesive provides an increased bond once applied in areas of high ambient temperatures. The thermosetting adhesive provides elevated temperature performance up to Class N 392 °F temperature rating.