BONDERITE S-MA M-4001/M-4002 AERO 2-K maskant is a 100% solid, two component, polyurethane based, air curing, hand peelable coating that provides protection to metallic surfaces during mechanical fabrication and chemical processing. Due to its advanced chemistry, BONDERITE S-MA M4001/M-4002 AERO 2-K maskant’s rapid cure allows the user to process coated parts much faster than with conventional maskants, both water and solvent based.