Longlife coolant is a heavy-duty hybrid anti-boil / anti-freeze coolant utilising nitrite chemistry. Longlife coolant uses an advanced combination of organic technology corrosion inhibitors that contain no silicates, borates, phosphates or amines combined with conventional technology ingredients included for suitability in a range of vehicles. Longlife coolants contain nitrite, nitrate and molybdate. This coolant uses nitrite base technology and is suitable for typical measuring techniques. The product is dyed a yellow colour for ready identification.