本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。本规范涵盖了一种作为双组分系统提供的可喷涂耐燃油聚硫醚聚氨酯密封化合物。该密封化合物通常用于通过喷射应用密封金属和复合整体式燃油箱，但其用途不限于此类应用。它可用于原始燃油箱接缝、接头、紧固件和fay表面边缘的密封，或用于传统圆角和紧固件密封的修复。 作为燃料安全壳屏障，它也可用于辅助燃料箱和燃料电池腔的内部或外部。它可以在环境温度下固化，也可以在每次涂覆涂层后经过4到5小时的初始环境固化期后，在高达140-mDF（60-mDC）的温和加热下固化。密封剂制造商指定的底漆需要与密封剂一起使用，并且必须在密封之前涂抹。可使用喷枪在燃油箱和非燃油箱区域涂抹密封剂。对于较小的补漆区域，可用刷子涂抹密封剂。该密封剂可长期使用- 65至250mDF（-54至+121mDC），短期暴露（约6小时）至350mDF（171mDC）。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.This specification covers one type of sprayable fuel resistant polythioether urethane sealing compound supplied as a two-component system.This sealing compound has been used typically for sealing metal and composite integral fuel tanks by spray application, but usage is not limited to such applications. It can be used for original fuel tank sealing of seams, joints, fasteners and fay surface edges or for repair of conventional fillet and fastener seals. As a fuel containment barrier, it can also be used on the interior or exterior of auxiliary fuel tanks and fuel cell cavities. It can be cured at ambient temperatures or with mild heat up to 140 \mDF (60 \mDC) following an initial 4 to 5 hour ambient cure period after each coating application. A primer, specifiedby the sealant manufacturer, is required with the sealing compound and must be applied prior to sealing. The sealingcompound can be applied in fuel tank and non-fuel tank areas by the use of a spray gun. Sealant can be applied by brush for small touch-up areas. The sealing compound is usable long term from -65 to 250 \mDF (-54 to + 121 \mDC), with short term exposure (approximately 6 hours) to 350 \mDF (171 \mDC).