I have an old FSM and it mentions using Loctite 220 and 515. I have found no such stuff. You can get red, blue and green, and it is for bolts and fasteners only not sealant. I'm using it between my aluminum output housings on my D300. What has everyone else used. I'm guessing permatex, but I wanna check before I do so. Let me know your thoughts.

Brian

You can use blue Loc-tite but it's not nessecary. Regular black silicone would be fine. If your using a clocking ring use red for the ring studs.

What about blue permatex between the ring and the cast housing, the blue loctite seems a bit runny. Your saying use high strength red to mount the ring to the housing.

Thanks

Personally I like Permatex's "The Right Stuff" for any sealing job.

Loctite is to keep bolts/nuts/studs in place. It's not a sealant.

Ultra-Gray is my fav, works on almost everything, gaskets are so last decade :D

The sealants the FSM is referring to are "anaerobic sealants". They are becoming much more common. They are a gel that cures in the lack of oxygen, made for sealing machined flanges. Some can fill in imperfections as deep as .020". There is a variety of anaerobic sealants on the market, as far as I can tell, they are all made by Locktite, just sold under different names (Caterpillar, Detroit Diesel, John Deere, Permatex). Each manufacturer has a slightly different recipe, but they are mostly all the same.
Anaerobic sealants are better for sealing joints like transfercase to transmission surface than RTV. Joints like this have torque going through them, and no matter how tight you get the bolts, they will "walk". Nothing that can actually be seen, it is microscopic. RTV will fail when used in this type of joint. The microscopic movement of the surfaces will tear up RTV over time. However, anaerobic sealants stay soft over time, and will allow some movement of the flanges without degradation of the seal.

I've always used Permatex aircraft sealant for this type of application, but I've recently tried the Loctite anerobic sealant... Time will tell whether it's superior, but from the discussions I've had with Loctite, it is promising.

I cant find any variety of loctite "sealant". All I can get is permatex stuff. I hope it works.

You gotta ask at the counter at a GOOD parts house. They might have to order it in for you.
Forget about the zit-faced kids at the chains knowing what you're looking for... Those twerps are proud of the fact that they know what red and blue loctite are (if they do) and will insist that you're full of shiat asking about loctite sealant.

Can you get a part number for me? I'd really appreciate it!! :D

I'll try to remember to grab a tube of it from my shop tomorrow, to get the #s for you.

...You really ought to find and establish a relationship with a good parts house (not one of the crappy chains.) Get to know some real professionals, spend your money there (even if it costs you a little more than the chains), then enjoy the benefits of dealing with people who not only know exactly what you're looking for, but who can also suggest solutions for you when you don't quite know what you're looking for.

I cant find any variety of loctite "sealant". All I can get is permatex stuff. I hope it works.


Locktite,....Permatex, they are all the same damned company.
Like I said before, it is mostly all the same product, just sold under different names.
Did you read my previous post? :confused:

Thanks all and I'm gonna try the ultra grey.

thanks alot

Thanks all and I'm gonna try the ultra grey.

thanks alot
Then I guess you don't need a part #.

Post it up for the other people following this thread please. :D

From the Loctite webpage (which isn't that hard to figure out)

http://www.loctite.com/int_henkel/loctite_us/loctite_content.cfm?layout=4&productline=OEM2020&path=Assembly%20Products|Gasketing|Form%2Din%2DPla ce%20Anaerobic

Hey guys thanks for all the great info. I learned something new. Here is what I bought and damn is it expensive.
http://www.permatex.com/products/prodidx.asp?automotive=yes&f_call=get_item&item_no=51531

Looks like 509 is the shizzy :D
Gonna git me some... Good timing too, 'cuz I'm just about to put my t-case together and I was going to use the Ultra Gray.

From the Loctite webpage (which isn't that hard to figure out)

http://www.loctite.com/int_henkel/loctite_us/loctite_content.cfm?layout=4&productline=OEM2020&path=Assembly%20Products|Gasketing|Form%2Din%2DPla ce%20Anaerobic


Not hard, but I am one lazy basta**. So thanks. :flipoff2:

Sounds like this is the stuff I should use when I clock my D300 between the ring and the case.

Hey guys thanks for all the great info. I learned something new. Here is what I bought and damn is it expensive.
http://www.permatex.com/products/prodidx.asp?automotive=yes&f_call=get_item&item_no=51531
Interesting that this has the same part # as the Loctite 515, but the Loctite product is claimed good to .050 gap, but Permatex only specs the 51531 sold under it's name to .015.

Anyway, this is the stuff... Pick yer poison from among the offerings.

First ran into this type of sealant on the case halves of German-built Getrag gearboxes from the '80s. The stuff did its job. My first use of the Loctite 515 was on the crappily machined oil pump housing to cover flange on an aftermarket AMC V8 timing cover. The idiots producing them were machining the sealing surface in two passes... one per side... and all the timing covers were coming up with enough of a variance between the machined areas of that flange that the necessarily thin pump cover gaskets couldn't seal them... The 515 is designed to fill gaps on devices like pumps.

Hey guys thanks for all the great info. I learned something new. Here is what I bought and damn is it expensive.
http://www.permatex.com/products/prodidx.asp?automotive=yes&f_call=get_item&item_no=51531


Where did you buy it. Anyone got an online source for this stuff?

I bought it at a Parts Plus

Where did you buy it. Anyone got an online source for this stuff?
Uh.... This... and all of the questions in this thread, in fact, could have been answered by a simple Google search.... "Loctite 515" brings up 5,370 hits on Google... Lots of info. Not too tough to figure out how to find it.