Grease has two main ingredients--
- A lubricant that combats friction
- A thickener, which gives the grease the consistency that will hold it in place next to moving parts
Bhai jaan NLGI is like thickness/viscosity grading. A grease having any NLGI grading can have any lubricating ingredient. for example a NLGI-2 grease can be a lithium grease, silicone grease, graphite grease or molybdenum disulfide grease.
Silicone grease can be used to provide lubrication and corrosion resistance where oil-based lubricants would attack rubber parts/seals, moreover, it maintain stability under high temperatures.
whereas
EP grease contains solid lubricants, usually graphite and/or molybdenum disulfide, to provide protection under heavy loadings. The solid lubricants bonds to the surface of the metal and when the lubricant film gets too thin, the solid lubricant prevents metal-to-metal contact and the resulting friction and wear.
So, we are looking for silicone based grease.