Bostik El Supremo BuilderEl Supremo Builders Epoxy Multi purpose thermosetting material that exhibits e x c e l l e n t bonding properties on various materials such as concrete metal, wood, glass, ceramics and porcelain. Parts bonded with Bostik El Supremo exhibit excellent adhesive strength and high resistance to water, most acids, most alkali and other chemicals. Uses: This adhesive is designed for bonding applications, including bonding old to new concrete, dowelling metal