Protect engines and water systems against freeze damage during winter layup.Highly concentrated, non-toxic propylene glycol formula protects engines and freshwater systems during winter layup. Provides up to -200F freeze protection when used full strength. Dilute to make up to three gallons of -50. Not for use as engine coolant. Freeze protection ratings based on freeze/burst point of copper pipe.Key FeaturesNon-toxic propylene glycol formula protects engines and freshwater systems during winter layupProvides up to -200F freeze protection when used full strength; Makes up to 3 gallons of -50Burst protection to -200F (-129C)Freeze protection within a range of -98F to -103F (-72C to -75C)Concentrated, nontoxicSaves shelf space and can be diluted to meet specific needsContains corrosion inhibitors to protect all engine metals including aluminum