Thins Aquaseal® and accelerates drying time. Highly recommended as a pre-cleaner and after-cleaner. The solvent cleans and prepares the surface, readying it for Aquaseal speeding the tack time to 15 minutes and the full cure time to less than two hours. Cotol-240 is also ideal for removing tar, sap, glue, and other resins from various surfaces including glass, plastic and metal. Ratio: 1 part Cotol™ to 2 parts Aquaseal®.