HD Degreaser is a combination of aggressive caustics, buffering and stabilizing compounds that will penetrate layers of grease without drying out. This allows a fast, long term attack with minimal degradation of surfaces. HD Degreaser can be used for pre-treating oil stains on concrete. This product is also used for soaking through very thick layers of clay, grease, foodstuffs, hydraulic fluid and oil stains in one application.