Neugenic 4175 CA - CARB Compliant Mastic Remover is a heavy duty concentrated biodegradable and is safe on all metals, glass and concrete. California approved(CA); No V.O.C's (ARB 310); non petroleum semi-aqueous cleaner for removing mastic glues, oils, greases and tar from most surfaces. Test before using on rubber, plastics, vinyl and painted surfaces. Approximate coverage per pail is 500 sq. ft.