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If your goal is protecting potable water lines in an RV or boat, look for "RV/Marine Antifreeze" at local retailers. The exact required for your local climate's freeze
Whether a solution or a concentrate is more cost-effective for you. Food Grade Propylene Glycol 99.9+% Purity | eBay Food Grade Propylene Glycol 99.9+% Purity | eBay. Public Health Statement for Propylene Glycol - CDC where to buy food grade antifreeze
: Automotive antifreeze is usually green or orange and is toxic . Non-toxic RV/Marine antifreeze is typically pink .