1 1/2" x 60 yds. (12 Pack) 3M - 234 Masking Tape, General purpose masking tape designed to be used in medium temperature bake operations.. Features a smooth crepe paper backing treated with a heat and solvent resistant saturant and a rubber adhesive. 27 pounds per inch of width tensile strength. 34 ounces per inch of width adhesion to steel. 8% elongation at break. Up to 250° F. for 30 minutes.