Liqui Moly Braking 619973 - Liqui Moly 21158, Liqui Moly manufactures this DOT 4 brake fluid, known for its high boiling point and effective corrosion protection. The product, Liqui Moly 21158, is available in a 5-litre capacity, making it suitable for maintaining optimal brake performance. Typical applications include use in hydraulic brake and clutch systems of motor vehicles. Liqui Moly 21158 DOT 4 Brake Fluid 5L Corrosion Protection High Boiling Point