How Does It Work?
The DRY-BLOCK System has been successfully used for over 15 years to provide moisture control of concrete masonry walls. It is the only complete integral system on the market to address the moisture reduction of both CMU and mortar. The DRY-BLOCK System consists of two separate liquid polymeric admixtures. DRY-BLOCK Block Admixture is mixed throughout the concrete during manufacturing of the CMU, and DRY-BLOCK Mortar Admixture is mixed into the mortar. During the curing process, the polymeric admixtures within the CMU and mortar become an integral part of the cement matrix. They become locked into the CMUs and mortar to provide long lasting resistance to water penetration.

Because the admixtures are present throughout the CMU and mortar, any water that enters the wall system is prevented from wicking through the CMU or mortar. While the DRYBLOCK System

prevents the wicking of water in the CMU and mortar, it still allows the wall system to ``breathe." The DRY-BLOCK System's unique polymers minimize migration of moisture that can carry soluble salts to the surface and cause unsightly efflorescence.

The DRY-BLOCK System is only one part of a moisture protection system for concrete masonry walls. Other elements include:

• Proper drainage within the core or cavity area.
• A properly installed flashing and weep system.

Grace Constuction