3M SCOTCHBLOK MASKING PAPER - 3M Scotchblok Masking Paper is a tightly-bonded, specially-coated masking paper specifically manufactured for the marine aftermarket. This superior masking paper offers the ultimate penetration resistance from all solvents used in today's gelcoat and paint systems. 3M Scotchblok Masking Paper's bonded fiber formation reduces contamination of freshly painted and varnished surfaces and provides excellent conformability and holds up well under wet sanding conditions. Distinctive gold color for easy identification. Product is sold by the 180' long roll. 12 rolls per case.