This is a FAP12BLU 12" Blue Masking Paper. 12" polycoated "Blue" Masking Paper (Premium) 3 roll sleeve. Is a tough, film-bonded paper that stops penetr ation from urethane paints, solvents & water. Blue color for better natural light reflection in booth. This product enables you to wet sand without having to remask. Poly film on outside for lint-free water resistant surface.