PR-1422 fuel tank sealant, class B, is a 2 part dichromate cured polysulfide compound. It has a service temperature range from -65F to 250F.

03-BK-74 Black Polyurethane Topcoat
03-BK-74 Black Polyurethane Topcoat is a chemically cured, polyurethane topcoat intended for use on exterior application on aircraft and aerospace equipment. When used over properly applied commercial or military primers, it provides excellent protection against weathering, humidity and salt spray.