本规范涵盖了一种热反射非黄变白色耐雨水侵蚀聚氨酯涂层系统的要求。本规范直接替代军用规范MIL-C-83445A（美国空军）公告3。这些产品通常用于保护玻璃纤维增强塑料层压板和其他用于飞机和导弹外表面的塑料零件，但用途不限于此类应用。

This specification covers the requirements for one type of thermally reflective non-yellowing white rain erosion resistant polyurethane coating system. This specification has been prepared as a direct replacement for the Military specification MIL-C-83445A (USAF) Notice 3.These products have been used typically for protecting glass fabric reinforced plastic laminates and other plastic parts used for exterior surfaces of aircraft and missiles, but usage is not limited to such applications.