3M™ Double Coated Urethane Foam Tape 4004 is an off-white, 0.250 in. (6.4 mm) thick, double coated, open cell urethane foam tape that offers high shear strength. It is ideal for applications such as mounting interior signs and nameplates. - This includes both interior and exterior applications where the tape will be protected from the environment. The variances in thickness often make an important difference in proper performance.