Form This specification covers one type of sprayable fuel resistant polythioether sealing compound supplied as a two-component system. Application 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 ??(60 ?? following an initial 4 to 5 hour ambient cure period after each coating application. A primer@ specified by the sealant manufacturer@ is required with the sealing compound and must be applied prior to sealing. The sealing compound 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 ??(-54 to + 121 ??@ with short term exposure (approximately 6 hours) to 350 ??(171 ??. Classification The sealing compound shall be usable for spray application and shall be supplied in the following types: Type A - White Type B - Black Type C - Clear Safety - Hazardous Materials While the materials@ methods@ applications@ and processes described or referenced in this specification may involve the use of hazardous materials@ this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.