Low Emissions White Gel Coat#683 White Gel Coat is a highly durable Low Emissions ISO gel coat and is the industry production standard for molding applications. Our gelcoats provide superior performance in critical use environments with outstanding cosmetics and exceptional in process application properties. One gallon of gel coat will cover approximately 40 80 sq ft. Use as a sandable base coat for painting or polish to a high luster finish. Spray unthinned into molds using a