Natural rubber (NR) comes from the rubber tree, Hevea brasiliensis. NR has a high tensile strength over a wide hardness range. Other salient features of NR is low compression set and stress relaxation, excellent electrical properties and high resistance to wear and fatigue. NR is the material of choice in many applications where the requirement is low heat build-up such as large vehicle tyres, carcass for passenger car tyres, vibration dampers, springs and rubber bearings.