Leak-Seal Transparent 500ml - RUS-3410 ™ Is an easy-to-use, rubberised protective coating designed to fill and seal leaks and cracks. It provides a watertight, flexible seal. • Seals leaks and cracks • Watertight semi-smooth finish • Can be top-coated with latex or oil-based paints • For use on metal, aluminium, PVC, concrete, masonry, asphalt roofing rmaterials, etc