Maston Spray Seal is an easy-to-use rubberized utility coating that stops and seals leaks and cracks instantly. It provides a flexible water-tight seal that prevents moisture penetration, rust and corrosion. Its high-build and high-viscosity formula is specifically developed to maintain superior flexibility even with temperature changes, joints of different materials and UV radiation. Maston SpraySeal® coating can be used on everything from sealing leaks on sunroofs, ventilations, drains, ductwork and gutters to sealing small foundation cracks. This versatile coating can be over-painted with any paint after it has dried.