This adhesive is a versatile adhesive that exceeds the apa s afg-01 specification. It is designed for a wide range of construction applications including wet frozen and treated lumber. It is also ideal for metal brick concrete mirrors ceramics and most large panel-type substrates. This heavy duty product fills gaps and irregularities between materials and provides a more solid backup surface. It reduces the amount of nailing and helps eliminate squeaky floors. It also offers excellent water-resistance and remains permanently flexible.