**Lightweight split faced block may require a film-forming product due to its extreme porosity.
Drying time, @ 72°F, 50% RH:
H&C® HYDRO-DEFEND® SX-7 SILOXANE WATER REPELLENTS are designed to weatherproof old and new concrete and masonry surfaces against natures destructive forces. It provides a long lasting breathable barrier that resists cracking, airborne dust and dirt, salt,efflorescence and spalling. SX-7 is a 7% siloxane that penetrates deep into the surface to chemically react with and bond to it.
1 Gallon, 5 Gallon
|Coverage & Drying time||
*Coverage: sq ft/gal
*Coverage will vary depending on the porosity and texture of the substrate.