Febi Dot 4 Brake Fluid, febi’s DOT 4, DOT 4 LV (low viscosity), DOT 4 Plus, DOT 5.1 and DOT 5.1 EHV (electric and hybrid vehicle) range of fully-synthetic brake fluids is based on glycols, and they contain oxidation and corrosion inhibitors, feature excellent dry and wet boiling point properties, and prevent vapour bubble formation.

Friction during the braking process generates heat; some of this heat is absorbed by the brake fluid, which must meet the requirements defined in the applicable standards: Dry boiling point of the brake fluid with no water content [°C], Wet boiling point of the brake fluid with water content [°C], pH value of the brake fluid.

The parameters are defined by standards FMVSS No. 116, SAE J1703, ISO 4925 and PN-EN ISO 2719: 2016-08 and constitute some of the basic criteria for determining the suitability for use. These parameters for brake fluid are summarised according to standards SAE J1703 and ISO 4925 (dry and wet boiling points, viscosity), as well as FMVSS No. 116 (pH value).