Polyurethane is the polymer generated in the process of addition polymerization of multifunctional isocyanates with polyol. due to its comprehensive characteristics it os used in almost every industry and life domain. Polyurethane holds an extraordinary resistance to wearing and tearing, it also characterized by perfect elasticity and high elasticity modulus even with high degree of hardness as well as by good resiliency and vibration isolation. It possesses very high resistance to chemicals, i. e. oils, grease, organic solvents, petrol and many otherl it is also water-proof depending on the type of applied PU. Light or UV radiation does not affect negatively on polyurethane. It is resistant to air and ozone exposition, as a result it undergoes no process of ageing.