HG Natural Stone Cleaner - Oil and Grease Stain Absorber (Product 42) &ndash; 8.45 fl oz (250 ml) HIGHLY EFFECTIVE. HG Natural Stone Cleaner is the most effective deep cleaner for all types of oil and grease stains from all porous stone surfaces (flagstones, natural stone, cement, concrete, etc.) PROBLEM SOLVER. Each cleaning solution from HG is formulated to solve a very specific problem, and you can rely on this Natural Stone Cleaner to conquer the toughest jobs, intensively and effortlessly restoring any stone surface EASY TO USE. No vigorous scrubbing necessary. This Natural Stone Cleaner is self-acting product which absorbs the oil or grease from the stone. Simply apply a quarter inch to the stain, wait until its dry, scrape off, and then wipe off any residue with a damp cloth. GREAT VALUE. One bottle of HG Natural Stone Cleaner will keep your surfaces clean and looking great and will not discolor your stone surface EASY TO USE. The poultice action means that stains are lifted away