TUFCHEM II Joint Sealant is a two-component urethane asphalt sealant for expansion contraction and control joints in corrosion-resistant floor construction. TUFCHEM II Joint Sealant is designed to offer a degree of flexing capability in joints where joint movement is taking place. It provides high bond strength and is used where resiliency, flexibility, and chemical resistance are required. TUFCHEM II Joint Sealant by its nature is black in color. Proper rules for joint width:depth ratios should be followed when using Tufchem II Joint Sealant. Consult Corrosion Engineering specifications CES-334 for mixing instructions and CES-130 for installation instructions.