Ameripolish SR2 is a solvent-based sealer that penetrates deep into dense, hard, and non-porous concrete surfaces to create a barrier that repels both oil- and water-based stains. SR2 has an extremely small molecular size, so it reaches deeper into the surface than other products, providing more complete protection. It doesn't form a typical film-like "guard" stain protection on the surface, but rather a breathable, sub-surface barrier that provides maximum stain resistance. SR2 offers extreme hydropobic and oil phobic characteristics, ensuring it can repel stains found in residential settings as well as commercial and even industrial applications. Ameripolish SR2 can be used as a stand-alone products, however, we recommend using it in conjunction with AmeriPolish 3D HS or 3D HSL Densifiers for maximum results. Coverage: approximately 3,000 - 5,000 sq ft per gallon.