Question: do an fuel fittings need sealant?
Answer: Tapered thread fittings, like on Brakes and Fuel lines do not require sealant on the thread, as if tightened well enough, can not leak. LocTight 569 if you want to use a sealer on your fuel system fittings, that's all we use it's a hydraulic sealant but will not be broken down buy fuel.