Ameripolish® Oil Ingester is a water-based microbial stain remover that consumes and breaks down oil-based stains and absorbs odors from the surface of concrete without causing damage or affecting any existing colorant, sealer, or stain protector. This biodegradable and VOC-compliant product is environmentally safe and can be used daily. Deeply embedded oil spots may take weeks to be removed; this is normal as oil tends to penetrate deep in the concrete. Oil Ingester eats away at the oil and does not wash it into WWTP or city drainage runoffs.