Castrol's open gear greases can be divided into two main types:
Semi-dry working film (Metallic Soap) The primary function of this type of lubricant is to act as a friction reducing interface between the meshing surfaces and to cushion against shock loads.
Semi-fluid gel (Non Soap) Our unique semi-fluid gel (thixotropic) greases are formulated with a non-soap, inorganic thickening system.
