Abstract
In late years, the utilization of high reflectance paint is promoted and the demand of such product is increasing year by year. We carried out various experiments about the effect of high reflectance paint. The high reflectance paint is often used at roof which said the most rapid deteriorate place of the building, and its weatherability is considered as relating to heat blocking performance. In this report, it followed a previous report(part7), we conducted an investigation of the durability or detoriorate condition of paint film, especially the performance to block the heat with the high reflectance paint after the natural weathering test for 8 years and measurement method.