Natural stone stain remover powder. This is not a pre-mixed product. Powder designed to eliminate surface organic stains such as oil, grease, butter and other organic, non-acid stains. S.A.C. will not remove inorganic stains such as rust or very deep stains. This is not a stone restoration powder. It will not polish the stone. It will not remove etch marks, commonly mistaken as "water spots" (chemical burns caused by acids such as fruit, vinegar, etc.). More than one application may be needed. Also available in 6 lbs For best results use with Lavenet, neutral stone cleaner and Seal & Go S, stone sealer S.A.C (Stain Absorbing Compound) Powder to remove organic stains from most marble, granite, travertine, limestone and other porous natural stones. Natural stone stain remover powder. This is not a pre-mixed product. Powder designed to eliminate surface organic stains such as oil, grease, butter and other organic, non-acid stains S.A.C. will not remove inorganic stains such as rust or very deep stains. This is not a stone restoration powder. It will not polish the stone. It will not remove etch marks, commonly mistaken as "water spots" (chemical burns caused by acids such as fruit, vinegar, etc.). More than one application may be needed. For best results use with Lavenet, neutral stone cleaner and Seal & Go S, stone sealer. If you have any questions about our products, please contact us. We are happy to consult!