Product Application Service Life Nulon XBF should be changed every 24 months under standard driving conditions in order to maintain protection against vapour lock and corrosion. Compatibility Nulon XBF is only compatible with brake fluids that meet the DOT 4 or Super DOT 4 brake fluid specifications. Useful Information Nulon XBF contains inhibitors to reduce corrosion of the many alloys components found in braking systems. Oxidation inhibitors are also used to prevent the oxidation process of the fluid. Nulon XBF has no adverse effect on the physical properties of the rubber cups and O rings used in the master and wheel cylinders. Equilibrium reflux boiling point (ERBP) is the average temperature of a fluid boiling under equilibrium conditions (reflux) at atmospheric conditions. High performance brake fluids such as Nulon XBF must have a high enough boiling point (ERBP) to resist vapour lock under severe braking conditions. Note that the boiling point of the brake fluid will deteriorate significantly with moisture adsorption. With use, brake fluid absorbs water from the atmosphere and reduces the ERBP. It is difficult to completely seal the braking system to prevent the ingress of atmospheric moisture or water splashes through hoses and the master cylinder. Brake fluids must withstand the absorption of at least 3% to 4% water without lowering the boiling point to a dangerous level. The presence of more free water significantly increases the chance of brake failure due to vapour lock and can promote corrosion of the brake system. This is why it is so critical to change the fluid every two years. | 
