Are Loctite and Permatex the same?

[ohecht]

Are these brands the same company or product?

I have been unable to find the Loctite 518 I have had great results with before on my transmission flanges, but I found Permatex 51817, which is described as the same product, but is blue rather than red.

To complicate things more, Loctite also has part number 51817 for a specific size of the 518 material.

Are these things identical?

Thanks,

Olivier

[TerryBPP]

Noooooooooooo! Loctite is for securing bolts permanently. Permatex is a sealer for gaskets. They are nothing alike. What are you using it on?

[RoninLB]

Originally posted by ohecht
Are these things identical?

I'm not sure what's going on

but the info says

purple for low strength
blue for med strength
red for high

and the container says " Man. by Permatex"

I think the last 2 dig of the 5 dig no. is for size........Ron

[Peterfrans]

Loctite not only makes stuff for securing bolts but a whole range of gasket materials. Loctite 574 for instance is recommended for sealing the crankcase.

[Rot 911]

Yes both Loctite and Permatex make sealers and threadlockers.

[MotoSook]

This was discuss not to long ago. There is a thread here and in the rebuild forum.

Basically, use the Loctite stuff.

[RickM]

Here's a discussion on this topic: Loctite vs Permatex equivalency

[1fastredsc]

The permatex red isn't bad for threadlocking head studs, and i used the green on a loose bearing race in the trans and it locked it up real quick.

[ChrisBennet]

I get my Loctite 518 from NAPA.
PepBoys carries Permatex products.
My bottle of Permatex Medium Strength Thread Locker Blue Item #2424 say "Manufactured for Permatex by Loctite Corp" on the back.
-Chris

[yelcab1]

Loctite is the company behind the technology, they make and sell all their stuff via distributors.

Permatex is a brand used by another company to sell some of the same products.

So, Permatex products are loctite products, but not vice versa.

[Hugh R]

My understanding is you don't use the red unless you NEVER-EVER want to take it apart again. My brother works at the Jet Propulsion Lab near Pasadena and he says that JPL doesn't allow the red to be used on satellites that get shot out of the solar system, because they might want to take something apart before it goes.

[ohecht]

I am surprised the NAPAs here don't have Loctite 518, only Permatex 518, and that the Permatex is blue while the loctite is red.

Olivier

[911pcars]

"I am surprised the NAPAs here don't have Loctite 518, only Permatex 518, and that the Permatex is blue while the loctite is red."

Let's not confuse a gasket sealer with a thread locking compound.

Permatex 518 and 574 are gasket-type, aneroebic sealers.

Loctite Red, Blue and Green are thread locking compounds which may also have Permatex labeling. Red, Blue and Green also have their own ID numbers. Loctite has more related products for fitting parts inside another.

Sherwood
http://members.rennlist.org/911pcars

[ohecht]

I am definitely referring to the Permatex 518, which is an anaerobic gasket maker and is blue in color, while the LocTite 518 I had was also the anaerobic gasket maker but was red in color.

Olivier

[CarreraS2]

Originally posted by Hugh R
My understanding is you don't use the red unless you NEVER-EVER want to take it apart again. My brother works at the Jet Propulsion Lab near Pasadena and he says that JPL doesn't allow the red to be used on satellites that get shot out of the solar system, because they might want to take something apart before it goes.

I've used red on lots of things that I've taken apart again.

I don't think you'd want to use it on little tiny nuts and bolts, but on the larger pieces, I've never had a problem loosening the bolt/nut.

[911pcars]

Hi Olivier,
I believe 574 is not marketed for our shores; I haven't seen it advertised in domestic industrial supply houses; and only in a few automotive supply houses.

The Permatex/Loctite 518 is the domestic counterpart to 574. I understand it works well too and is the gasket sealer of choice for many manufacturer's metal-on-metal applications. The situation is that the 911 crankcase is the very first part to assemble (other than the oil pump) and the amount of work involved to not return to this area requires a sealer with known and proven qualities. However, I'm sure there are success and failure stories for every brand of anaerobic sealer. For many folks, maybe it's equal parts sealer choice, surface preparation and ..... luck.

Sherwood

[Doug Zielke]

Originally posted by 911pcars
I believe 574 is not marketed for our shores....

Maybe, but I got a bottle of the real thing (German writing on the label) from my friendly Porsche stealer.

[911pcars]

Doug,
I meant for normal consumer use. Porsche owners aren't normal ....... consumers.

Sherwood