National Gypsum has signed an agreement with Bonsal American to supply cement backer board for the building material products maker. Terms of the agreement were not disclosed.

National Gypsum makes PermaBase cement backer board, featuring the EdgeTech double-wrapped edge for closer fastening, the company says. The technology is designed to virtually eliminate crumbling and blowout.

Bonsal American and National Gypsum are both headquartered in Charlotte, N.C.