Water-based, fluid-applied R-Guard MVP (maximum vapor permeability) air- and water-resistive barrier has a permeability rating of 17 perms, making it suitable for projects that specify a high vapor permeability level. The tan product is applied to walls or CMUs with a sprayer or roller before veneer installation to keep air from going in or out. Installation of this product can be up to 75% faster than sheet wraps. Prosoco Inc. 800-255-4255. www.prosoco.com