ChemWorld SR1 Glycol Corrosion Inhibitor. 1 gallon converts 28 gallons of pure 99.9% Propylene Glycol into a 95% solution of Inhibited Propylene Glycol. 1 gallon of ChemWorld SR1 will protect 140 gallons of 20% glycol solution from corrosion. This protect may be ordered in clear or in pink form. This product is not approved for use in Food and Beverage facilities. For food and beverage facilities applications, use Chemworld 811. 55 gallons of ChemWorld SR1 will protect 7,500 gallons of 20% glycol solution and 5 gallon of ChemWorld SR1 will protect 700 gallons of 20% glycol solution from corrosion. Multiple color options. Message us for the color you require.