Cashew nut shell liquid is a natural product that is used as raw material for the synthesis of wide variety of polymers and water resistant resins. Cashew Nut Shell Liquid or CNSL is often considered as the better and cheaper material for unsaturated phenols. CNSL has innumerable applications in polymer based industries such as friction linings, paints and varnishes, laminating resins, rubber compounding resins, cashew cements, polyurethane based polymers, surfactants, epoxy resins, foundry chemicals and intermediates for chemical industry.