3M 401M is a 9 Mil double coated paper tape with rubber adhesive 860 on a 3 Mil green plaid paper liner. Excellent balance of high initial adhesion and good holding power to a wide variety of material. The paper carrier has been specially treated to improve its strength and removability characteristics from high internal strength surfaces. - 9 Mil tape for temporary attaching or fixturing. High initial bond strength. Natural rubber double coated tape with heavy paper carrier for increased strength and dimensional stability. Offers good initial adhesion to a variety of surfaces.