Dike®Advanced formula seeks out and seals internal leaks, preventing antifreeze and water from seeping into the engine. Compatible with all standard and permanent radiator coolants (both green and orange) in cars, trucks, and water cooled equipment. Keep Dike in your vehicle emergency kit for on the spot repairs or as a preventative measure for vehicles operating under severe conditions. Add 1 pint to every 4 gallons of coolant or water.