Holts Radiator Coolant Blue 4LtGrocery Personal Care, Car Care, Holts Radiator Coolant Blue 4Ltrs, 4Ltrs This Holts Radiator Coolant offers a long lasting solution to keep your car's engine cool and protected from corrosion. With its unique formulation, it provides optimal engine performance and efficient heat transfer, resulting in a longer lifespan for your vehicle. Contains 4L of coolant, enough for multiple fill ups.