So I was listening to the latest GunDudes podcast (and the Theis holster thread) and they mentioned this stuff. Anyone use it on their front sight screw or any other firearm parts? Red, blue or some other color? Red sounds pretty tough to un-do. Not sure how much heat it takes to melt it.
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I have worked in machine shops for a good part of my younger adult days. I would use blue. The red would be too tough to get the small screw back out if the need ever arose. Both will stand up to the heat, so that wouldn't be an issue.
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"Red" is stronger. By that I mean, once applied it is very difficult to back out the screw you applied it to. Blue works well if you have a screw or bolt that is backing out because of vibration or similar external or internal forces. It is by no means a permanent as Red. If you ever want to relatively easily remove what ever it is you applied the Loctite to my advice is to use blue. Once the red has set up it is not going to let go. Also, keep all that kind of stuff in the refrigerator and it will last for years.
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I use blue on my holster screws once I get the holster adjusted to where I like it.
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Loctite's website says that their thread lockers aren't recommended for use on plastic. A small dab of RTV silicone caulking will hold the sight screw until you want to remove it.
I used RED on the front sight screw because blue loosened up. The front sight screw is so small, very little loctite actually contacts it, so hopefully I can break it loose with my Lone Wolff front sight tool. If not, I will just break it off, since my Warren sight set comes with a front sight screw, which is shorter than the Glock standard one.
I NEVER use the red for anything in firearms. Blue and sometimes purple are the recommended choices for gunsmith type work. Personally I use blue for front sight change out with the proper tools, and tightening to the correct inch/pounds ensures it is not coming lose. If I am mounting a scope for a customer I always clean the holes with a drop of Chemtool B-12 on the end of a toothpick so not to expose the cleaner to the bluing and then wick it back out od the hole. This is followed by using blue Loctite and tightening the screws to the proper torque. Even the "Big Boy" guns won't make the screws loosen. My experience may be different from others so I will just say this has worked for me thus far.
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You can buy this stuff from Dawson: https://www.dawsonprecision.com/Prod...EDE-1300732007
Just using the terms "red" or "blue" to distinguish the Loctite products is not going to be sufficient these days, things have gotten complicated. I counted nine different types of "red threadlocker" on the first page of a search of the site, and nine different types of "blue threadlocker" before I stopped looking.
The website is: Adhesives, Sealants & Surface Treatments - Henkel North America
I quickly got lost in the website research, so I just use Dave's recommendations, with very good results. Recently I had to change a set of sights that I had mounted using the 262/620 combination, and found that while both screws could be removed, it was only with considerable pressure. Those sights were definitely NOT going to move by themselves.
The Loctite that remained in the parts looks like a whitish, thick, dry, paste. I was able to clean it off using a cyanoacrylate remover product called "Un Cure" that can be found at hobby stores. I've also used acetone to remove Loctite.
That, and a steel brush.
Last edited by cohland; 02-09-2012 at 11:55 AM.
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I use RED on my GLOCK front sights all the time. I have used BLUE before but it didn't hold well.
I have no issues removing the front sight screw after using RED. I do it all the time as I like to play musical sights.
I also used red on my front sight no issues.
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