Loctite Green vs Red vs Black


May 23, 2007, 06:41 PM
From the descriptions I've found these seem to be very similar with the green apparently being more of a "penetrating" version. If someone could separate the 3 out for me I would appreciate it. The Loctite website was most unhelpful.

For instance, which would be the most appropriate for:

AR Gas key to carrier screws (before staking the screws)
1911 plunger tube to frame (before staking the tube correctly)
1911 Grip Screw Bushings (bushing to frame NOT on the grip screws themselves)

If you have a couple other descriptions for uses of the 3 types I would appreciate that info as well.


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May 23, 2007, 07:07 PM
The only ones I have ever used are red 262 (high strength, takes heat to help break the seal) and blue 242 (removeable with just hand tools) and 222MS purple for really small screws.

Page 109, of the Adhesive Sourcebook LT-3355, has a good chart (we have the hardcopy at work). Page 105 has a selction guide.


May 23, 2007, 07:08 PM
Loctite Blue 242 is for screws that may need to be removed.
It's used for scope bases and rings, grip screws, etc.
It's purpose is to prevent screws from vibrating loose, yet still allow them to be easily removed with standard tools.

Loctite Red is a permanent bonder for screws that will not normally be removed.
This is used for 1911 grip screw bushings to prevent them from coming out with the grip screw, and anywhere else you want something to be firmly bonded in place, and you don't plan on removing it.
To remove parts bonded with Red, you need to use heat and heavy-duty tools.

Loctite Black, also called Loctite "Black MAX" is a "super glue" mixed with rubbery bonders.
This is used to bond ribs and sights on shotgun barrels, and is apparently some good stuff.
The rubbery bonders cushion vibration and prevent the parts from coming off.
It's primarily a bonder used to "glue" parts on something. It's used in the automotive industry to bond handles and knobs in cars.

Loctite Green is a very thin consistency and is used to secure screws that are already in place.
The thin consistency allows the agent to "wick" into the threads.

May 23, 2007, 11:34 PM
There are two types of Loc-Tite Green
Loc-Tite green thread retainer #29000 is used like Blue 242 but you can loosen and retighten screws without having to reapply the compound.

This stuff is good for screws such as grip panel screws that you may want to eventually take out for access to internal parts for cleaning etc.

Loc-Tite #609 is a retaining compound that is used for permanently anchoring press fit bushings or any componenet that is intended to be more or less permanently anchored in place.
It requires more heat and force to remove than Loc-Tite red.

I use Loc-Tite #609 on things such as Plunger tubes and grip screw bushings on 1911 pistol frames.
If these parts have to be removed the holes must be cleaned up and in the case of the grip bushings, the threads must be chased clean before reinstalling a new part.
I have yet to have a plunger tube fall off a frame or a grip bushing back out when this compound is applied. HTH

May 24, 2007, 12:16 AM
Has all you could want on using threadlockers and retaining compounds.


May 24, 2007, 06:14 PM
Go to Brownell's web site, look under "thread-locker & adhesives, they list many of the Locktite products and where they should be used.

chris allen
May 24, 2007, 10:49 PM
I love the red locktite!! I have drilled out many customers screws who have damaged the screws that have been installed using red locktite.Keep up the good work---ha!All kidding aside small screws in guns should not need red locktite, the blue will work fine .

May 25, 2007, 12:09 AM
I've only used Blue 242.

An interesting thing to note is that on my 10/22, I had to install a buffer. Even with using loctite, the screws of sight bases and scope bases installed on the reciever would vibrate loose without it. It confused me for a while, especially when I could never get my scope zero'd in.

May 25, 2007, 09:01 AM
Actually, I personally have not seen anything on any firearm that would require the use of red Loc-Tite and chris allen I know exactly what you are saying!:banghead:

May 25, 2007, 09:42 AM
222 purple is enough for 99% of all firearm use, before I use it a screw would have needed to loosen on me more than once. A #5 set screw (or smaller) bonded with any thread locker is a bear to get out. My wifeís nail polish works great on things like rifle trigger adjustment screws; they donít turn unless you want them to.

June 1, 2007, 07:59 PM
I have used red loctite to secure a JP muzzle break/eliminator in the proper orientation...Seems I will probably never get it off without a blowtorch but that's fine by me.

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