Ive used the teflon tape for sealing threadings, however it doesnt feel like it seals it completely.

I have 2 catch cans, and the threadings are leaking. What is a better sealant? JBweld, thread locker or hondabond?

 

are you wrapping it around the thread so that when you thread the fitting into the hole, it tightens around the thread, or wants to push it off the thread. you might want to try some pipe dope thread sealant... just the liquid version of the tape. otherwise, use some red loctite thread sealant.

pipe sealant:

red thread loctite:

 

are they pipe threads? or AN threads? if they are AN, you may want to put an o-ring there. if its pipe thread, 4-5 full wraps, wrapped the opposite direction of turning to tighten should do it

 

Masters 'Pro Dope'

 

ive been using permatex thread sealant latley and i really like. i bought it at advanced auto.

http://www.permatex.com/produc...t.htm

 

I use pipe dope or teflon, its crucial the teflon tape is put on the right way, its amazing how often I see it put on wrong.

 

i seen some domestic people use a brownish sticky liquid for thread sealing..
anyone know what that is or called?

 

Number one sealant, you can get it at AAP and the like. It has a big #1 on it. I don't know the actual name, I've just always referred to it as #1. It doesn't get broken down by gasoline.

I've used it to seal gas tank bulkheads before.

 

good info thanks guys!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garage 808 Hatch &raquo;</TD></TR><TR><TD CLASS="quote">are they pipe threads? or AN threads? if they are AN, you may want to put an o-ring there. if its pipe thread, 4-5 full wraps, wrapped the opposite direction of turning to tighten should do it</TD></TR></TABLE>

Never, never , never use pipe sealant or tape on AN fittings. It is only used for "pipe" fittings where the threads are the ones making the seal. Pipe threads are tapered, thats why they require a sealant or tape on the threads. And you can only use an o-ring when there is a provision in what ever you are threading the fitting into. And besides, AN fittings do not need o-rings. Check out the fitting in this link. It requires an o-ring to seal where the fitting would screw into the part. It is found on aftermarket fuel rails, fuel pressure regulators, ect.
http://store.summitracing.com/...w=sku

Now on the other hand a fitting like this would require pipe sealant only on the tapered threads of the fitting, not the AN side of the fitting. Pipe thread is refered to as "NPT" or national pipe thread and it is always in fractional sizes except for the "Brittish Fittings" that are generally about a thread off per inch. But these are not that common and really expensive.
http://store.summitracing.com/...w=sku

Furthermore, "AN" is an old trem that means "Army/Navy." The most common ones are also a 37 degree fitting. 37 degrees is where the sealing takes place. There are several different kinds of "AN" fittings. And also the threads are based off a 1/16" rule. Example: a -10 is 10/16 which is 5/8" reduced, and -12 is 12/16 which is 3/4" and the refers to the size of opening in the fitting. Hope this helps you.