Natural rubber is natural polymer which is mainly isoprene. It containswater and some impurities such as organic compounds. The goodproperties of natural rubber are its high tensile strength, elongation, tearresistance, and abrasion resistance. It is excellent in resilience andcompression. However, it is not a suitable product when subjected toaging by sunlight, ultraviolet light, heat, oxygen, and ozone explosionconditions. It also has poor petroleum and solvent resistances.