Loctite, which color?

[jayhuh]

I think that the Sig armorer course just says to cinch the grip screws down till they come into contact with the boss and then add 1/8 of a turn. No need for adhesive. The way I look at, they are only going to come loose when shooting extensively, so I make it a habit to check them frequently when shooting. My P239 .40s' screws come loose after about 40 rounds. So when shooting at the range, I check them from time. I carry the gun frequently and never find that they come loose and I've never lost one.

I've heard that some people add a dab of grease (Slide-slide or TW-25B) to the grip screws and that helps keep them in. I've also heard that folks have tried a bit of Teflon plumbers tape with success.

I personally would never use an adhesive, but I'm no expert. I'm just worried that if I tried to remove a grip screw that I put blue or red Loctite on, I'd end up removing the grip screw boss from the frame along with the grip screw if I tried to remove it at some point down the road.

Someone is going to post that they have lost a grip screw or two, while CCW'ing or while the pistol was sitting in their safe, and that they now use an ounce of red Loctite on each and every grip screw to prevent future mishaps. My thought would be to just check the screws at regular intervals.

Lots of LEO's carry Sigs on a daily basis, in open holsters, and the pistols get banged against car door posts, chair seat arms and what not. Yes some loose screws occasionally between qualifications while carrying, but I'd bet that when looked at in the totality, it's not that often, and not enough to warrant the use of Loctite. The problem, if you want to call it that, can probably be traced back to them not checking and caring for their equipment.

This is just my opinion. Please don't beat me up over it. I'm just tossing my opinion out there. If the OP still wants Loctite, he/she can get the best price on it at Lowes or Home Depot and they can find it in the adhesive section.

[Barang]

Well, after shooting 3000 + rounds total. She put the gun down on the bench and when I picked it up to shoot I noticed the screw was missing. That's when I thought of loctite but not sure what color. So checking it on regular basis is a sound advice. Also, for added insurance, maybe little bit of loctite wouldn't hurt. Anyway, I only saw 3 different colors at O'Reilly. Did not know there are more...Thanks for making them known.

[awl168]

Loctite 242 (aka blue Loctite). Oddly enough, it'll probably be in a red tube. You can find it at Home Depot.

[Barang]

Why can they make the color of the tube represent the content?

[3006Garand]

There's white, blue and red. Last time my wife and I were at the range, her MK25 grips' screw came undone. What color is the correct one to use?

Blue, and only 1 small drop per screw. No more.

[teflondog]

For screws that I will have to take out eventually, I use a very small amount of blue Loctite. Remember to reapply the blue Loctite whenever you remove the screws.

[Barang]

I was gonna ask about that, a drop it is. Thanks

[dmcmillenfv]

For ultra fine threads that are removed often try a little clear fingernail polish. Not quite as strong as blue, less Likely to pull fine threads out in aluminum.

[Anthracis]

Blue

[RitcheyRch]

Another vote for blue

[Fishslayer]

Blue. Red is for stud and bearing mount(permanent), never heard of white. There are many more colors depending on application.

The white might be PST (Pipe Sealant with Teflon) I've used it for threadlocking where I wanted low strength. A bit messy.

I believe the purple is lower strength than blue.

I wouldn't use any LocTite on grip screws. Of course, I check them more often than every 3K rounds... :facepalm.

[Bill Steele]

I use Blue on the grip screw bushings (the things the grip screw go into). I would not use any Loctite on the grip screws.

Just check and snug them when you clean the gun. If you never clean your gun, well, start.

[Whiterabbit]

There's white, blue and red. Last time my wife and I were at the range, her MK25 grips' screw came undone. What color is the correct one to use?

There are MANY MANY colors, and there is overlap. For example, you can buy red locktite that is permanent, that is used for automation (vibration resistant) and also medium strength.

Divorce yourself from color. If blue is medium, and purple is medium (because they both are), which color is "more" medium?

What about green? It's not weak, but it's definitely not permanent!

Look for the number, then look up the datasheet. You are looking for medium or strong grip, or even permanent depending on your application.

[Barang]

Appreciate all the help guys. Thank you all.

[choprzrul]

I learned from riding an 85" iron head, & 5 years doing industrial production line maintenance, that stuff comes loose.

IMHO, clear silicone is better in 75% of applications than loctite. Once the silicone dries, it holds the fastener really well. Of course, everything needs to be clean and dry prior to assy.

In the event that the fastener does work its way loose, the silicone will almost always keep it from backing out and becoming lost.....which is pretty important when riding down the road or running & gunning.

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