MicroPoly® Lubricants, a proprietary product of PhyMet, Inc., is a solid lubricant that is a mixture of polymers, oils, and other additives that can be customized for your specific lubrication requirements. PhyMet's processing creates a solid lubricant with an oil-filled connected, porous structure. The porous polymer structure fills the air space between the rolling elements and race, keeping foreign objects out while retaining oil in the pores. The oil lubricates the bearing surfaces by capillary action. Additional oil is supplied to the bearing from the reserves in the pores. There is no need for maintenance or additional lubrication during the life of a MicroPoly filled bearing.