CORK in combination with RUBBER Provides unique properties. By itself Cork is amazing, cork sheet is natural, light, imputrescible, impervious to liquids and gases, flexible, resistant, cork sheet has great dimensional stability and is a thermal and acoustic insulator. Remarkably when combined with rubber we get properties of the polymer plus the property of true compressibility. This unique combination has a never-ending potential of applications. Rubberized Cork has major superiorities over other gasket material, which makes it ideal for wide range of other gasket material where application of oil is involved and only choice for flanges, which are not fully flat, or having limited surface area. Other material under pressure crush, distort or extrude. Cork is endowed with a natural property allowing it to recover its initial shape after being compressed. Cork is the only material that can compress without lateral spread, and can recover up to 80% of its original thickness. This property ensures there is a Relaxation stress (outward pressure) on the flanges to maintain the seal.
Thus rubber cork sheet has wide application in Transformers & switchgears, Automobiles and General electrical industry. Many applications ranging from gearboxes, inspection covers to water piping gaskets use rubber - cork. In high voltage transformers rubberized cork sheet is used as oil sealants.
