Our Grade A High Temperature Fluoroelastomer Hose (same material used in Viton hose) is intended for biodiesel applications, but can be used in many other various applications. It is 100% compatible with B100 (100% biodiesel). Please check chemical compatibility charts for Type A hose if you intend to use other corrosive fluids. The 20% Fluoroelastomer hose is compatible up to B20 (20% biodiesel)