To obtain maximum performance and lifetime of the GHH RAND airend, we recommend the exclusive use of the GHH RAND developed lubricants. Primecool Primecool  |  Primecool Plus  For GHH RAND oil-injected airends we developed this series of high performance coolants. Ultralube Ultralube  |  Ultralube F (food grade)  This lubricants was developed for the different needs of our oil-free stages. Silol Silol  |  Silol FG (food grade)  With SILOL and SILOL FG (Food Grade) we provide two synthetic lubricants for the particularities of the silo transport industry.