Prosoco Sure Klean Weather Seal Siloxane PD (predilute) is a ready-to- use, water-based silane/siloxane water repellent for concrete and most masonry and stucco surfaces. Siloxane PD will not impair the natural breathing characteristics of treated surfaces. It helps masonry resist cracking, spalling, staining and other damage related to water intrusion. Low odor and alkaline stable, Siloxane PD is ideal for field and in-plant application. Siloxane PD penetrates deeply for long-lasting protection on vertical or horizontal surfaces. Prosoco Sure Klean Weather Seal Siloxane PD's service life is estimated at more than 10 years. Treated surfaces “breathe”; doesn’t trap moisture. Siloxane PD is low in odor which makes occupied buildings a safe environment during application. For best results, apply Prosoco Sure Klean Weather Seal Siloxane PD “wet-on-wet” to a visibly dry and absorbent surface.