3" x 60 yds. 3M - 401+Masking Tape. Balanced construction for applications where clean removal and conformability are required. Heat and solvent resistance provide excellent performance in most painting applications. Removes cleanly when subject to temperatures up to 250 degrees F. for 30 minutes.6. 7 Mil.25 pounds per inch of width tensile strength.38 ounces per inch of width adhesion to steel.12% elongation at break. Case of 8.