Abstract
The purpose of this study is to grasp the outdoor exposure weather resistance of polyurethane waterproofing materials generally applied and manufactured in Korea. 6 different KS certificated products was experimented on tensile property and surface observation after 0.5 to 3years outdoor exposure, 37 to 112 days $80^{\circ}C$ heat ageing and 1 300 to 4 000 hours Xenon arc accelerated treatment which are major deterioration factors. In conclusion, It was found that tensile strength decreases gradually by outdoor exposure, heat ageing, Xenon accelerated exposure treatment. And tensile strength was decreased 29.3% in 3 years outdoor exposure. And Xenon arc($550W/m^2@290{\sim}800nm$) and $80^{\circ}C$ heat ageing time corresponding to this 29.3% decreasing was 1 269 hour and 53 days respectively.
