3M glass cloth tape 398FR is a white, glass cloth film tape with an acrylic adhesive that provides superior product performance and flame retardant properties. It features a 5 Mil backing and a blue polyethylene film liner for ease of application. This tape is durable and has a high temperature resistance (up to 250 °F). - It also features good puncture resistance, high tensile strength and superior abrasion resistance. The white color ensures a clean and appealing finished product. Combined, these qualities make it is an ideal choice for use in many aerospace applications, including aircraft repair.