Some Industrial Greases bear the designation "EP," which stands for "Extreme Pressure." Normal grease can be compressed under high pressure or shock loading to the point where the greased parts come into physical contact, causing friction and wear. EP greases have increased film breakdown resistance, form sacrificial coatings on the metal surface to protect if the film does break down, or include solid lubricants such as graphite or molybdenum disulfide to provide protection even if no grease remains. Somecontain solid additives such as copper or ceramic powder for static high pressure and/or high temperature applications, or where corrosion could prevent component disassembly later in their service life. These compounds act as a release agent. Solid additives cannot be used in bearings because of tight tolerances. Solid additives will cause increased wear in bearings.