The Armor SC25 is a proprietary water-based Siliconate water repellent and impregnating sealer for white or very light concrete. It penetrates and chemically bonds deep within the substrate to form a hydrophobic barrier within the pores. It provides long lasting protection against deterioration or staining caused by water absorption, salt and freeze-thaw cycles. Once sealed, substrate become less susceptible to cracking, spalling, pitting, staining, mold, mildew, algae and efflorescence. The Armor SC25 will not impair the natural breathing characteristics of treated substrates, nor will it produce a film or coating.