Castrol Alusol™ SL 51 XBB is a high performance soluble metalworking fluid which is free of boron, formaldehyde releasing agent and chlorine. It contains an additive package that may help to enhance machining performance and surface finish. It also provides excellent product stability which helps to lower the overall operational costs. Alusol SL 51 XBB is suitable for large central systems and single sump machines.