The main requirements to a brake fluid is its compatibility with rubber and metal parts of the brake system. SEIKEN is the only company in the world which produces components of the brake system and fluids at the same time and ensures safe braking. SEIKEN BF4 brake fluid has a higher boiling temperature and is suitable for most passenger cars and trucks. The product have the compliance certificate JIS Q 9001:2008 (ISO 9001:2008).