Silca NFS Pump Lube - a 100% pure synthetic oil optimized to adhere to SILCA leather gaskets and coat pump tube walls. The result: Lower pumping force, higher pumping efficiency and extended leather gasket wear due to reduced friction and heat. By putting a few drops of Silca NFS Pump Lube into your pump every 6 months to a year, the coating on the walls will keep it pumping at peak efficiency with minimum effort.