Rifle Scopes Damage to finish after loctite use

Peter83

Sergeant of the Hide
Full Member
Minuteman
Mar 25, 2019
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Hi Snipers hide.

So, i just mounted my scope again because it had a little cant. When i mounted it last, i used blue loctite 243.

I scraped the loctite off the scope using a old plastic credit card. I noticed that the finish on the scope came off too, but only on one end of the scope. I did the exact same thing to both ends, but only the front end showed the damage to the finish.

I remember when i i last mounted it, that when wiping off exess loctite on the front end, it was a little black.

Have any of you experienced this before?

Will this tiny removing of material to the surface on one end of the scope cause trouble with the scope sitting higher on the rear ring, and lower on the front ring causing the rings to pressure uneven on the scope? ( i know this seems unlikely, but i just wanted to be sure ).

all the best, Peter.
 

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What kind/brand of scope ?

It looks to me like there are actually two coats of finish on the scope. The first is the finish as applied by the factory. The second "finish" looks like a shitty rattle can paint job. If the surface is not properly prepped, paint will come off very easily. I use blue Loctite all the time and have never had a problem with it doing anything bad to factory finishes.

I doubt it will have any effect on anything. Scratchin' my head as to why anyone would do something like that though.....
 
If you are worried about a scope slipping, use some rosin in the rings or a thumb part of a very thin rubber glove. But with these high tech rings of today it rarely happens. Just torque them correctly and shoot.
 
Had a pair of Seekins cap screws come loose. They were torqued according to spec which was 20 inch pounds. Yes I used a torque driver. Now I put a tiny dab of low strength (purple) on each screw. No issues since and just a piece of mind for me.
 
Looks to me like its been painted/coated. What scope?

I would bet that almost all scope tubes are anodized (even cheap shit ones) and the finish isnt going to "flake" off like that. You can scratch it off but its not going to flake off like that.
 
The scope is a Vortex Viper PST gen2 5-25x50. Its common to use loctite between rings and scope in europe, so it is what ive been teached. I do it just to be sure it wont slide in the rings i guess. I know it seems like it came off in "flakes" but it really dident, it came off slowly as i tryed to scrape the loctite off with a credit card. As said, it was only in one end of the scope this happend. Its almost like the loctite reacted with the coating somehow? I dont really care for the look on the finish, but would like to have peace off mind that it wont cause any trouble. can you guys think of anything? What about the material / finish that been scraped off in one end of the scope, is there any chance in hell that so little material coming off in one part / end of the scope, will make the scope sitting uneven in the two rings, and making the rings make uneven pressure on the scope?
 
It will not have any practical effect. It is a cosmetic blemish, nothing more.

Using loctite between rings and scope tube was a worthwhile thing to do before there were CNC machines. With modern mounts, it is neither necessary nor advisable.

ILya

Yep, this... It was very common place years ago and never hurt anything, I never had a problem removing it but I always used my finger nail.
 
A little update. It was deffently the loctite that reacted with the coating, and removed it. I tried putting a little loctite on a paper towel an wiping it on the scope. The paper towel was black after that, and the coating was gone after a couple og wipe downs. I removed all of the coating this way, so now the surface looks uniform with no spots of colour diffrence. I hope it dosent have any negative effect that i removed the coating. This is the only scope that have reacted this way with loctite, but i will not use loctite anymore from now on.
 
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I use rosin on large caliber guns. Loctite 243 is a threadlocker, I don't think it will help in this situation, if anything, you should be using a retaining compound.
 
Why would anyone use loctite to hold a scope in place. If you lap the rings for at least 70% contact and set the set the mounting screws to the correct in/lbs it should not slip. If it does, you have a shitty scope or shitty rings.
 
Why would anyone use loctite to hold a scope in place. If you lap the rings for at least 70% contact and set the set the mounting screws to the correct in/lbs it should not slip. If it does, you have a shitty scope or shitty rings.
If you have to lap them I'd buy other rings.
I've used Badger, NightForce, Seekins, Vortex.
All have held the scopes/zero and haven't left a mark on a scope yet.

R