To obtain maximum performance and lifetime of your airend, GHH RAND recommend the exclusive use of our lubricants. PRIMECOOL® PRIMECOOL®  |  PRIMECOOL® PLUS  For GHH RAND oil-injected airends we developed this series of high performance coolants: PRIMECOOL®. 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.