Castor Wax Hydrogenated Castor Oil. Non-yellowing, hard wax. Rheology modifier for oil paints and mediums. May be added to other waxes to increase hardness and durability. Melt point: 85oC (185oF). Product code: 109 Safety Data Sheet Based on available information, this material is not classified as hazardous according to criteria of Safe Work Australia. Download full SDS