The Types segmentation classifies glycol‑ether brake fluids according to performance standards and formulation nuances. The most prevalent grades are DOT 3, DOT 4, and DOT 5.1, each defined by minimum boiling points and viscosity ranges that align with specific vehicle braking requirements. DOT 3 fluids, with a lower boiling point, are typically employed in light‑duty passenger cars, contributing modestly to market volume but offering cost‑effective solutions for low‑stress applications. DOT 4 fluids, featuring higher boiling points and improved thermal stability, capture a larger share due to their suitability for both passenger and light commercial vehicles, thereby supporting a substantial portion of the market’s growth. DOT 5.1, the highest performance glycol‑ether grade, addresses the demands of heavy‑duty trucks and high‑speed off‑highway equipment, where extreme heat resistance is critical; its premium pricing reflects a smaller yet strategically important market slice. Emerging sub‑types such as low‑viscosity and fire‑resistant formulations further refine the taxonomy, enabling manufacturers to target niche segments that require specialized performance characteristics.