Antifreeze and Coolant PREMIXED 50/50 BLUE - 1 Gal - UltraCool - Universal. Ultra1Plus™ UltraCool Universal Antifreeze + Coolant 50/50 PREMIXED (Blue) is a premium, ethylene glycol antifreeze + coolant for heavy-duty diesel, gasoline, and natural gas-powered engines that protects your complete cooling system all year-round.
