CSD012-5M is extending filler master batch utilizing a 5 micron ground quartz.  This material has a slightly higher specific gravity than CSD015-5M. It has better green strength and is more suitable for extrusion applications. CSD012-5M is designed for ease of blending extending fillers in proportion with base compounds on a two roll mill to produce lower cost silicone rubber compounds.  This eliminates the health and safety issues of handling powder ground quartz.