3M Scotchrap 51 Electrical Tape 20 mil 6" x 100 ft PK4

What the tape does and who uses it

3M Scotchrap 51 is a black vinyl electrical tape rated for up to 2000 volts and continuous operation at 175 degrees Fahrenheit. Each roll is 6 inches wide, 100 feet long and 20 mil thick. The rubber adhesive delivers 30 ounces per inch of adhesion and the backing withstands 40 pounds per inch of tensile stress. The four-roll pack suits electricians, maintenance crews and anyone insulating or splicing wire in indoor or outdoor environments. UV resistance helps the tape survive sunlight exposure.

What to verify before ordering

Confirm that your application stays within the 2000-volt maximum and the 175-degree Fahrenheit temperature limit. The 20-mil thickness and 6-inch width must match the joint size and insulation build you plan. Check that rubber-based adhesive is compatible with the cable jacket material you are wrapping. The product meets ASTM D1000, so ensure that standard satisfies any project or code requirement you follow.

Build quality and daily handling

The vinyl backing resists abrasion, moisture and ultraviolet light, so wrapped splices hold up in direct sun and damp locations. Rubber adhesive stays tacky across the rated temperature range, reducing the chance of flags or unwinding after installation. Each continuous roll allows long, uninterrupted wraps on large-diameter cables or bus bars. Four rolls per package keep a spare on the truck or in the tool crib for the next job.