Prime Guard 1 Gallon RV Antifreeze -50 Burst

PRIME GUARD minus 50°F RV and Marine Antifreeze is a premium winterizing formulation safe for use in all types of potable water and plumbing systems. This ethyl alcohol formula is safe on copper, brass and all plastics (except acetate). This product is formulated to provide complete protection to minus 50°F. Some slush may appear at approximately 0°F, but this is not harmful to your water system. As temperature rises, and fluid warms, slush will disappear.