Will contact with water harm the effectiveness of silane-based water repellents?
Alkylalkoxysilanes are water-reactive molecules. This chemical reaction with water, known as hydrolysis, causes the silane-based water repellent to chemically bond with the substrate it is applied to. Protectosil® CHEM-TRETE® and Protectosil® AQUA-TRETE® products can perform this reaction with the naturally low moisture content of a “dry” substrate and penetrate deeply for long-lasting effectiveness. When hydrolysis occurs prematurely, the monomeric silane polymerizes and cannot penetrate the substrate effectively. To avoid premature hydrolysis of silane-based water repellent products, Protectosil® CHEM-TRETE® and Protectosil® AQUA-TRETE® products should be stored in their original, tightly-sealed containers in a dry storage area. All equipment should be clean and dry (preferably flushed with solvent before use). Never apply silane-based water repellents to a visibly wet or damp surface. Wait at least 48 to 72 hours of dry, sunny weather after pressure-cleaning a structure before begin
