Water-Repellent Protection for Absorbent Surfaces HMK® S731 Silane Impregnator is a ready-to-use penetrating treatment formulated to reduce the penetration of water and dirt into absorbent natural and artificial stone surfaces. The silane-based formula helps protect treated materials while maintaining their natural appearance with little to no aesthetic change. Suitable for Natural Stone, Concrete, and Brick The impregnator is designed for use on absorbent soft and hard natural stones, artificial stone, concrete, and unglazed brick. Its vapor-permeable formula allows moisture vapor transmission, making it suitable for applications where breathable protection is important. Interior and Exterior Surface Protection HMK® S731 can be used on both interior and exterior surfaces to help reduce water absorption, dirt penetration, and the potential for frost damage. The ready-to-use formula requires no mixing before application.
