SB 2400 is a solvent-free concentrated blend of siloxane and silane designed for jobsite dilution with clean water. The unique silicone micro emulsion creates an effective water repellent for a wide variety of substrates such as split face solid block, architectural concrete, clay brick, clay tile, sandstone and clay & concrete pavers. SB 2400 is an excellent means for protecting masonry from the accumulation of biological growth, water penetration leading to freeze/thaw damage, efflorescence and dirt accum