SMP-81 is an ASTM certified concrete curing agent that incorporates a tailored dehydration matrix united with a proprietary EPA registered anti-microbial. This is carried with a complex binding pigment that prevents the growth of all mold, mildew, sapstain, fungus and any biological life on the coatings film without compromising any environmental considerations. SMP-81 is water based, non-toxic and environmentally safe. This highly unique product is the only ASTM curing agent that is also a mold proofer on the market today. Use SMP-81 on green concrete structures as it is an ASTM c309 certified as a concrete curing agent. 5-gal pail