16266 Radiator Coolant Dye for Extended Life Coolants. Pinpoint leaks in radiators, hoses/fittings, water pumps, and head gaskets. Extended-life dye is specifically formulated for use in extended-life coolants, eliminating the color distortion problem found in the existing regular radiator coolant dye when mixed with extended-life coolant. It is for use with red, orange, or yellow extended-life coolants. Each bottle services one vehicle.
