Prevents marine engine cooling systems and boat, RV and hoe plumbing systems from bursting in cold weather. The antifreeze is formulated with a premium additive package for maximum corrosion protection. When used correctly, it provides reliable burst protection to -50° for drinking water systems. The non-toxic Eco-friendly Proplene Glycol formula is tasteless, and contains no Glycerin. The bright pink color makes spring-time draining virtually foolproof.