As masonry water repellent:
Tap water is suitable for preparing solutions of BRB Siloen® WRE to an active substance content of 5% to 10% (dilute the product in the ratio 1:4 to 1:9). For very high-quality concrete, a 1:2 ratio may be necessary. Stir solutions to restore homogeneity if phase separation occurs. Apply by brush, roller, or low-pressure airless sprayer. Two wet-on-wet flood coats are preferred to ensure complete coverage.
As impregnating agent for construction materials:
Construction materials may be impregnated with dilute BRB Siloen® WRE solutions (1:20 to 1:50). The dilution ratio depends on the material and method of application (e.g., spraying or dipping).