Our Setting-Type Bonding Compounds are a plaster-based adhesive formulated to bond gypsum board to masonry, brick, or concrete walls and for bonding decorative cornices to plaster surfaces and for reinforcing joints in cornices. These Premium Compounds are incredibly strong and durable. They mix easily to form a creamy, lump-free compound and provide excellent adhesion to masonry, brick and concrete walls, and decorative cornices. USG Plaster Bonder™ provides an enhanced plaster adhesion to surfaces like gypsum plaster, cinder block, stone, drywall panels, and similar materials. Plaster Bonder is easily applied by brush, roller, or spray to a uniform continuous film.