Description
AP 551/R1 Brake Fluid
551, Re branded as Radi-CAL™ R1. 
AP R1 is a brake and clutch fluid suitable for all forms of motorsport and conforms to FMVSS 116 DOT3 specification.
AP R1 is magnesium compatible and has a higher boiling point than normal brake fluids intended for road use.
Designation.
– Radi-CAL™ R1.
‘Typical’ Boiling Points.
– New Dry 269°C
– ‘Wet’ E.R. 140°C
To obtain best performance from racing brake systems.
- Bleed the system thoroughly, immediately prior to each event using AP Racing brake fluid from a new sealed bottle.
- This is particularly important in wet or humid conditions or when the brakes are excessively hot.
- Always use fresh fluid and replace bottle cap when not in use.
- Never re-use brake fluid.
Use of high temperature brake fluid should not be used as a substitute for proper brake cooling.
– Recommended Shelf Life
The recommended shelf life of an unopened fluid bottle is 18 months.
SILICONE BRAKE FLUIDS – A WORD OF CAUTION
AP RACING NEITHER MARKETS SUCH FLUIDS NOR RECOMMENDS THEIR USE WITH OUR OWN OR ANY OTHER BRAKING SYSTEM.
Virtually all of the problems with Silicone Brake Fluids relate to:-
Long/spongy pedal
Sudden loss of brakes
Hanging on of brakes
