Liquid fart, in a crack

8802 B 1/2 fuel tank sealant. We use it all the time for our fuel cell repairs, potting electrical connectors etc. Cheaper if you buy in bulk. In our aviation business we have to adhere to "shelf life requirements" so we usually only buy what we need and keep any spares in the fridge until ready for use. The stuff has been around for ages. the B 1/2 means that it is brush-able application with a 1/2 hour pot life. In most cases (though not recommended) you can expose it to Av-gas or Jet-A (Kerosene) almost immediately after application. "Works good...lasts a long time." Flamemaster CS3204-B1-2-KIT AMS-S-8802 Type II Class B 1/2 Sealant