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Message: [QUOTE="SkySki Jason, post: 76090, member: 1118"] NPT fittings will leak without sealant, especially in diesel service (extremely low surface tension). I prefer Loctite 545 thread [I]sealant[/I]. This is a high-temp, high-pressure vibration resistant thread sealant and is IDEAL for use in our fuel systems. I would never use teflon tape on a fuel system anywhere... As far as keeping sealant out of fuel, I always wipe ALL the sealant off the first couple of threads before installing the fitting. Even though this is likely not too much of an issue with the 545 since it is not very viscous to start with and will not 'dry' until deprived of air. Loctite 545 is "A liquid sealant for locking and sealing high pressure, fluid power systems with tapered fittings. Contains no fillers and will not foul valves or fluid filtering systems" [url]http://www.google.com/products/catalog?hl=en&cp=11&gs_id=15&xhr=t&q=loctite+545&qe=bG9jdGl0ZSA1NDU&qesig=HupPFUoqxwbcJaDeHhvYYw&pkc=AFgZ2tklS-U2kZ5UD9F67cM1AK0L7IKWTy0d1uEggQLFQYs4yEBSwnNADpi3Xwx2NPWlTKNrqr_3xitAH28FLOGbhi19Cn5YBw&bav=on.2,or.r_gc.r_pw.&biw=1366&bih=643&um=1&ie=UTF-8&tbm=shop&cid=3567247113217565184&sa=X&ei=jzY9TqKmKcLKgQeG-KHtBw&sqi=2&ved=0CDYQ8wIwAQ[/url] [/QUOTE]

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