PROSOCO R-GUARD® Spray Wrap is a fluid-applied, ready-mixed, flexible acrylic coating to be applied to structural sheathing or CMU backup to prevent penetration of liquid water. Spray Wrap is part of the PROSOCO R-GUARD® systems for stopping destructive air and moisture leakage through cavity wall masonry veneer construction, as well as in stucco, EIFS and all other building wall assemblies.