Contact vinyl masking is used for creating your own adhesive backed stencils for Armour Etch and Sand Etch. Use the transparent vinyl when working on clear glass, taping your pattern beneath the glass. Use the beige vinyl with mirrors and unusual shaped objects when it is not possible to tape your design from the opposite side. Please refer to our Glass Etching Book, #140101 for complete information. Each roll measures 18” in width.