RUBBER COMPOUND Raw stock rubber is used in rubber tracks, it is blended, mixed and calendared to different compounds, thicknesses and hardness depending on the track for which it’s intended. Some synthetics are mixed here into the rubber for hardness and carbon is also used which gives the black color to the white virgin rubber and the green synthetics the carbon also aids in the wearing process of the rubber tracks and rubber pads.The mixing of the the rubber is called candering.Once all components are ready the steel wire, cleats and rubber are placed in the vulcanizing press and go through a series of heating and pressure procedures to combine all three components producing a high quality rubber track this procedure can take up to 5 hours per track. The track is then trimmed and inspected for any defects before being shipped worldwide.