Pyroil
Pyroil PYBF4-12 12 oz DOT 4 Brake Fluid Bottle
DOT 4 glycol brake fluid for disc and drum brakes with a 311°F boiling point in a 12 oz bottle
- Synthetic high-temp formula maximises braking performance
- DOT 4 glycol base suits disc and drum brakes
- 311 °F boiling point resists fade under load
- Amber colour allows quick visual fluid checks
- 12 fl oz bottle sized for top-ups and flushes
Product Purpose
Pyroil PYBF4-12 is a DOT 4 brake fluid designed for hydraulic brake systems using disc or drum brakes. It suits vehicle owners and mechanics performing fluid replacement or top-ups on compatible cars, trucks or motorcycles. The synthetic high-temperature formulation aims to maintain consistent braking performance under demanding conditions. The 12 fl oz bottle provides a practical volume for single-axle service or reserve supply.
Standard Constraints
DOT 4 specifications set the baseline for dry boiling point and viscosity, and this fluid meets a 311 Degrees F boiling point rating. Glycol-based fluids absorb moisture over time, which lowers the wet boiling point and can lead to vapour lock during heavy braking. OSHA compliance indicates the product meets workplace safety labelling requirements, but it does not extend the fluid’s service life. Regular replacement remains necessary to preserve system reliability.
Upgrade Context
This product replaces older DOT 3 fluids or degraded DOT 4 fluid that has absorbed water and lost boiling capacity. The jump is worth it when the system manufacturer specifies DOT 4 or when operating temperatures exceed the limits of the previous fill. It is not suitable for systems requiring DOT 5 silicone-based fluid or for mineral-oil hydraulic circuits. Buyers needing larger volumes for fleet service or complete system flushes will require multiple bottles.
Highlights
- Synthetic high-temp formula maximises braking performance
- DOT 4 glycol base suits disc and drum brakes
- 311 °F boiling point resists fade under load
- Amber colour allows quick visual fluid checks
- 12 fl oz bottle sized for top-ups and flushes
Specifications
| Brand | PYROIL |
|---|
Questions about this item
Should I pick the 12 oz bottle or a larger size?
This listing is for the 12 fl oz bottle only; choose it if that volume matches your bleed or top-off needs.
What does the 311 °F boiling point mean for everyday driving?
A 311 °F dry boiling point meets DOT 4 requirements and resists vapour lock during hard stops or mountain descents.
Which brake systems does the DOT 4 glycol fluid work with?
It is compatible with both disc and drum brake systems that specify DOT 4 fluid.
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