what color Loctite do you use on your sights? Red, blue, green, or purple?
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Sheepdoggit
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Interesting. Maybe they adjusted the formula: https://henkeladhesivesna.com/blog/the-difference-between-red-blue-green-and-purple-threadlockers/
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Wow, plus there is 263"Red" is not enough detail as you can see...
![Image]()
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Blue only
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That's been my experience probably because of what MarkCO said (#19).
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Blue on sights never use red on anything that mates to plastic !
But are you 100% sure you're not 100% sure?
This is what I switched to for mounting my RMRs. Haven’t had one loosen yet. I use red Loctite on both front and rear sights and haven’t had problems removing them if I need to. Even the front sight screw on Glocks are easy to break free.
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I use either 242 or 262 for everything. 242 is for stuff like knife pivots and holster hardware. There's no reason not to use 262 for irons. It's stupid to use blue for that purpose. Even 262 can loosen, and it's no problem at all to remove.
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I don't think it's stupid, like MarkCO said, "It depends." He went on to say "Most hardware has a black oxide coating which passivates the metal preventing most liquid threadlockers that are a liquid from oxidizing and working as intended. In those cases, a primer or activator is needed."
Some irons are not however. In that case, you may have to heat them up to remove them, but most iron sights do have a coating that might prevent it from being as effective as it might normally be in which case red seems like it might be the better idea. I've had irons installed with red and have never had trouble backing a screw out.
Anyway, DirectDrive quoted the following from Dawson Precision (#6):
From Dawson :
For All Dovetail Front Sight Installs
The Loctite 620 high temperature retaining compound
"Loctite 620" is what we use on all dovetail front sight installs.
Do not use on screw on front sights such as Glock, trust us.
Do not use it on rear sight installs as it makes it hard to tap rear sight for windage adjustment.
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For All Rear Sight and Screw On Front Sight Installs
Loctite 262 Threadlocker
"Loctite 262" is what we use on all dovetail rear sight and all screw on front sight installs.
It can also be used on well fit dovetail front sight installs, but is not impervious to gun cleaners like Loctite 620.
Use it on rear sight installs as it makes it possible tap rear sight for windage adjustment, and use very small amount on set screws so they can be loosened to adjust.
In other words, depending on the coating, blue might be fine, but red is useful as well (i.e. if Dawson uses Red (262), especially for Glock setups, I don't think it's stupid either).
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Meprolite recommended the green in the instructions. I had to order it because I could not find it locally.
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If you get married, definitely use Blue Loctite.
Just in case.
Just in case.
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I use 626 for sights. It works fine as a thread locker and also to float out dovetails. All my Glock irons are oxide. I use isopropyl to de-grease them, then 626. It works fine. I shoot about 40k/year on 1 practice gun, and I'm not interested in screwing around with stuff that doesn't work. So that's my perspective.
On Glock rears, I quit fitting them and stopped using set screws. That works much better for me. All my Glock rears are Warren, all my Glock fronts are Dawson. All oxide.
I press in Glock rears to center, with witness marks. If I want to make a small adjustment, I can do it with a pusher at the range. There's no thread locker involved.
You asked for information, and I gave it. But of course, do whatever works for you.
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