November 1, 2018
There are two types of water repellents for concrete masonry - surface treatments and integral water repellents. Surface treatments are applied to the weather-exposed side of the wall after construction. Integral water repellents are added to the concrete mix when the units are manufactured. There are a wide variety of both surface and integral water repellents available to suit the needs of any project. For more information on surface water repellents see TEK 19-1, Water Repellents for Concrete Masonry Walls.