Stealth Shield is a water-based Silicone Water Repellent made of a special hybrid of Silane and Siloxane. The active ingredients in Stealth Shield are a mixture of different-size particles-some larger, some smaller-to fill different size voids. This ensures good penetration into porous substrates, resulting in good coverage and durable water repellency. Additionally, the active ingredients in Stealth Shield Water Repellent can chemically react with the substrate, ensuring long-lasting performance. The product’s excellent water repellency and fast beading action are immediately apparent. What you will not see is any significant change in the substrate’s original appearance. Unlike most water repellents, Stealth Shield can be applied to uncured concrete once bleed water has evaporated. However, the penetration, performance, and durability of Stealth Shield is increased by every day that application can be delayed up to 28 days. TECHNICAL DATA SHEET