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底封涂料500是以烃系树脂、沥青系等的特殊粘结剂和绝热性能优异的轻质特殊矿物质为主要原料,再配以对钢铁具有优越防锈能力的颜料所组成,是一种粘稠度高的黑色涂料,而且涂膜干燥后仍能保持其柔软性能。在客车、电车、动车及货车的底架、地板上下面、侧板、顶板的内面、车顶等处涂饰后,对防锈、隔音、绝热、电气绝缘及钢板面的保护具有优越的性能。此外,在结合部做适当填充时,不仅对金属,而且对木材、石头、合成树脂等也能很好密接。此涂料于1956年3月在国铁技术研究所经过严格的试验,证明性能良好,到1961年在国铁工厂及车辆公司已投入使用达千吨之
Bottom seal coating 500 is based on hydrocarbon resin, asphalt and other special binder and adiabatic performance of light special minerals as the main raw material, together with the steel has a superior anti-rust paint composition is a High viscosity black paint, and the coating can still maintain its softness after drying. It has excellent performance on rust prevention, sound insulation, heat insulation, electrical insulation and steel surface protection after being coated on the chassis of buses, trams, motor vehicles and trucks, the upper and lower surfaces of floors, side panels, the inner surface of roof panels and the roof. In addition, the joints are properly filled, not only for metal, but also for wood, stone, synthetic resin, etc., can be very close contact. The coating in March 1956 at the National Railway Institute of Technology to undergo a rigorous test proved good performance until 1961 in the State Railway plant and vehicle companies have been put into use up to 1,000 tons