PROSOCO R-GUARD® Tape is a self-adhering, glass fiber tape for use with PROSOCO R-GUARD® Fill to reinforce rough openings, inside and outside corners and sheathing joints. It?s 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.