Bertech Blue Masking Tapes, also known as Blue Powder Coating Masking Tapes, are made of 1 mil thick polyester film with 2 mil thick silicone adhesive. These tapes are extremely economical and can be removed cleanly without leaving any adhesive residue. They are designed for temporary masking purposes. They are packaged as a 72 yard-long roll on a 3 in. core. Custom sizes available upon request. RoHS Compliant.