The brake fluid covered by this specification is military unique due to the requirement that it perform at a minimum ambient temperature of −55°C, whereas commercial silicone-based brake fluids are rated at a minimum ambient temperature of −40°C. It is intended for use as an operational fluid and preservative fluid in automotive hydraulic brake systems at ambient temperatures ranging from 55°C to −55°C and fluid temperatures ranging from 205°C to −55°C.

If brake fluid IAW this specification is used to replace another type of brake fluid, adequate flushing of the brake system must be accomplished to remove all traces of the brake fluid that is to be replaced. If these fluids are not completely removed, the corrosion-protective and preservative properties of the silicone fluid will be negated.