Dow Corning Z-6403 SILANE

Dow Corning® Z-6403 Silane is high purity, undiluted isobutyltriethoxy-silane. When diluted with an appropriate solvent, it can be used in the formulation of water repellent products. Upon proper application, the formulated product will penetrate and provide water repellency by chemically reacting with the cementitious substrate. Treated substrates are hydrophobic and retain their original appearance. Dow Corning Z-6403 Silane can also be used to improve the compatibility of mineral fillers or pigments in poly-olefins or to ease their dispersion in nonpolar matrices. Dow Corning Z-6403 Silane is a small molecule to allow for deep penetration into the cementitious surface. This material reacts with moisture in the air and in the substrate in the presence of an alkaline or acidic environment to produce hydroxy groups. These hydroxy groups will bond with the substrate and itself to produce a hydrophobic treatment that inhibits water absorption into the substrate. An alkaline environment, such as new concrete, will catalyze the reaction and speed the formation of the hydrophobic surface.Information provided by Dow Corning