#7-50 Line ENAMELEX Acrylic/Polyurethane Bonding Enamel is the next generation bonding enamel that has been formulated for exceptional adhesion and hardness. This premium interior/exterior bonding enamel is made with a unique Polyurethane-Acrylic Resin to give the product excellent flexibility, durability, and block resistance. #7-50 Line ENAMELEX is recommended for commercial, industrial, and institutional applications where high levels of abuse frequently occur. This product can be applied over properly primed interior wood, metal, drywall, and masonry surfaces. #7-50 Line ENAMELEX is self-priming to most masonry, fiberglass, laminates, many plastics, and ceramic tiles. It is ideal for doors, cabinets, windowsills and anywhere an ultra-tough product might be needed.