3M(TM) Polyester Splicing Tape 8401 Cream, 1/2 in x 72 yd 1.9 mil, 72 per case Bulk 3M(TM) Polyester Tape 8401 Cream, 1.9 mil (0.05 mm) polyester film tape with blended silicone and rubber adhesive system. 3M(TM) Polyester Tape 8401, designed for splicing release treated surfaces, masking and applications requiring high temperature resistance.