3M(TM) Thermosetable Glass Cloth Tape 3650 White, 5 in x 60 yd 8.3 mil, 8 per case Bulk White with blue film liner, 8.3 mil (0.20 mm) glass cloth tape with thermosetable rubber-resin adhesive. 3650 tape is a poly-linered version of 365 tape. Used for many applications requiring high adhesion and a very strong comformable backing.