PS105 is a water based penetrating, 40% chemically reactive triethoxyoctylsilane which repels water and moisture from concrete and other masonry offering invisible protection and a low VOC. At only 5 angstroms, its small particle size makes it ideal for very dense substrates made of concrete, brick, stucco, and stone. It penetrates deeply and chemically reacts with concrete and masonry components for long lasting protection. PS105 seals pores and capillaries of substrates preventing liquid and moisture absorption while allowing excellent vapor transmission. It combats efflorescence, freeze/thaw damage, leaching, acid rain deterioration, UV damage, deicer scaling, spalling, dirt buildup, staining, alkali attack, corrosion of reinforcing steel and mildew. It is designed to provide a high level of surface beading with penetration to protect against wind driven rains. PS105 has a milky white appearance. Upon proper application, it generally does not alter the texture of the substrate but may darken the substrate especially with over application.