Welcome to Sig Talk.

Not sure what could have caused that. I’ve never had rust on my 365 that’s also over a year old.
I did experience rust on a 12 round 365 mag that was brand new a few months ago.

First time I experienced rust on any of my mags. I believe in my case it was from carrying the mag in my pocket this summer and it got some moisture from sweating or maybe contaminated from something in my pocket. I usually carry a extra mag in a IWB mag carrier but it was printing a lot when wearing slimer fitting
t shirts this summer.

Was the rust on both sides of the slide or just one side?


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Welcome to Sig Talk.

Not sure what could have caused that. I’ve never had rust on my 365 that’s also over a year old.
I did experience rust on a 12 round 365 mag that was brand new a few months ago.

First time I experienced rust on any of my mags. I believe in my case it was from carrying the mag in my pocket this summer and it got some moisture from sweating or maybe contaminated from something in my pocket. I usually carry a extra mag in a IWB mag carrier but it was printing a lot when wearing slimer fitting
t shirts this summer.

Was the rust on both sides of the slide or just one side?


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The rust on the mag was all over. Unfortunately the first thing I did (my mistake) was to clean it off and oil the **** out of it. The slide had spots of rust on both sides of the slide, (think Dalmatian) but was most prevalent on the side toward my skin. A smart person would have taken pictures. I just reacted.

 

Give the Mother Ship a call. Maybe they can help you out. Send them a pic too.

 

I have two p365's and have had zero rust issues. On some warm days I have pulled my holster off my belt and found moisture on both the holster and the firearm. All I've ever done is dry it with a cloth or towel. Never had any rust.

That said I have seen several people (with pics) complain about rust on their p365 slide. I've seen discussion about acidic levels of an individual's sweat causing this. But there also is a belief our there that SOME 365's have some type of flaw in their finish that is susceptible to rust.

 

That's what I'm wondering. I just used a small cotton rag to wipe the sweat off of the slide.

 

I pocket carry during exercise and have had mine for about a year. I have a little rust around the rear sight (likely just the sight itself. So far so good, no rust otherwise.

 

Welcome,
Can you post pics of the rust?

 

 

Prob the finish, send er in.

 

I got rust on the body side of the slide on my P365. It got bad enough to pit and was first noticed during the summer months. Fixed the rust by cerakoting the slide. I just got a P365XL. I'll leave the slide alone for now but if it rusts near as easily as the 365 did I'll just cerakote it and carry on. I'm no big fan of Glocks but the finish on the Glock 19 Gen 5 I used to have was much more resistant to pretty much anything than the finish on any Sig I've ever owned.

 

We are seeing more and more Sig 365 coming in to be refinished because of rust issues

 

CCR, what are you guys doing for those customers?

 

Here are just some of the variables that play a role:

Regarding shooters- each individual has a different propensity for sweating, and a different type of sweat chemistry when it comes to what minerals are secreted and at what concentrations.

Regarding the holster and gun lubes- each shooter uses a different holster which plays a role in how much moisture it attracts and retains, and the chosen gun lubes play a role in oxidation resistance.

Regarding the steel- there are over 60 different formulas of 'stainless steel', each having its own pros and cons and rust resistance characteristics.


ETA: There's a naturally occurring electrochemical process called bimetallic corrosion, a.k.a. galvanic corrosion, when two dissimilar metals are in tight contact with one another and one rusts at a faster pace as a result, and I believe that is playing a role.

I'd like to see Sig use stainless or aluminum sights and not carbon steel. I also think the gun industry should move toward better coatings and away from the basic low cost coating we see on most open sights, and many gun parts.


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Here are just some of the variables that play a role:

Regarding shooters- each individual has a different propensity for sweating, and a different type of sweat chemistry when it comes to what minerals are secreted and at what concentrations.

Regarding the holster and gun lubes- each shooter uses a different holster which plays a role in how much moisture it attracts and retains, and the chosen gun lubes play a role in oxidation resistance.

Regarding the steel- there are over 60 different formulas of 'stainless steel', each having its own pros and cons and rust resistance characteristics.


ETA: There's a naturally occurring electrochemical process called bimetallic corrosion, a.k.a. galvanic corrosion, when two dissimilar metals are in tight contact with one another and one rusts at a faster pace as a result, and I believe that is playing a role.

I'd like to see Sig use stainless or aluminum sights and not carbon steel. I also think the gun industry should move toward better coatings and away from the basic low cost coating we see on most open sights, and many gun parts.


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The bimetallic corrosion is what I believe caused rust on my brand new 365 Mag from carrying it in my pocket with coins which up until that point I never had pocket carried a mag or having the mag in my EDC tray with other metals. Usually if I had a mag in my EDC tray it would be in my mag carrier.




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I’m my cleaning and maintenance routine I use a Rem Oil cloth in all of my guns and mags. The one 365 12 round that got rust on it was brand new and never got the Rem Oil treatment.
I bought 2 Rem Oil cloths 3 years ago and still using one. Haven’t even opened the second one.


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Hi all,
First time poster. I purchased a P365 as my EDC along with a 12 rd mag. I carry IWB @ 4 o'clock. A few weeks ago I went on a 5 day motorcycle camping trip around my state. I carried the firearm in an IWB concealment express holster under both jeans and riding pants. I wiped down the firearm every night but kept it next to me. When I got home I noticed I still had rust on the slide serrations and magazines. I cleaned it up as much as possible but when showed my buddy I was riding with, he was shocked. He rides with a Canik and didn't wipe it down at all. Not a lick of rust on anything.
My sig is less than a year old and I only have a 1000 rounds through it. Anybody else have these issues?
Alex

What did you use to wipe it down? My wife usually carries her 365 appendix. The butt of the gun does rest against her skin. She has had this gun for a year or two.
The gun is wiped down with a silicone rag after carry or any time it is handled.
It is usually hot and humid here in Florida. I have not seen any indication of rust on her gun.
I do inspect it often.

 

All,
First off, thank you all for your replies.

What did you use to wipe it down? My wife usually carries her 365 appendix. The butt of the gun does rest against her skin. She has had this gun for a year or two.
The gun is wiped down with a silicone rag after carry or any time it is handled.
It is usually hot and humid here in Florida. I have not seen any indication of rust on her gun.
I do inspect it often.

I used a small cotton shammy. I didn't bring proper cleaning gear with me as I only planned on being out on this moto-camping trip for 5 days (Up until now, I've focus on cleaning after every other session at the range).

 

Oh the rust, month old 15 rd mag rust inside the mag body and 2 12 rd mag exteriors had light rust even though wiped more often than not. Removed the rust and shot it with Norrells moly resin about 2 months ago to resolve those issues. Last week noticed some rust on the top of the front sight that I will address shortly. Nothing yet to report on the slide itself, but is only a matter of time till my acidic body chemistry claims another victim. I should just go ahead refinish the slide and put any worry to bed but I'm not at that point yet.

 

I've hiked and sweated on mine (tip; the 365 will run snakeshot, and keep two rounds at the top of the magazine), thus far, no problems. Had a little surface rust on a magazine; a quick wipe took care of it.
Moon

 

Welcome from Georgia.

 

Boeshield T9 and Renaissance Wax will prevent sweat corrosion on IWB carry pistols.

 

I get considerable rust on my P365. I need to check it often. When I go for a bike ride, it's on a bicycle, not a motorcycle, so my gun gets a lot of sweat.

I've been using Gunzilla, changing up to Eesox (I might give Boeshield a try). I don't know if that will be better or not.

I'm seeing rust in several spots. Around the rear sight, the magazine tube, both inside and out, on the outside of the slide, and near the front of the slide. Also, it has a WC grip module, and the magazine release tends to rust considerably. The mag release and magazine tube are where I see the most rust.

Is this something I'm concerned about? Not really. Certainly, I don't see it as a manufacturing problem. I must stay on top of it and protect the gun with a rust inhibitor.

 

Hose it down with Boeshield T9, wipe of the excess and let it dry. Then apply a couple coats of Renaissance Wax, letting it dry between coats and buffing off the excess. Water and sweat will just bead up and roll off when you are done.

 

How long does the wax hold up against the oil used when cleaning?

 

Two of my 4 P365's have had some issues with rusting from moderate carry. Annoying, but not enough for me to make a hubbub about it since I carry/use my guns a lot. I just make sure to oil them a little more.

 

Haven’t had any rust issues.

Mine does get cleaned and lubed once a week after going to range, so that may help.

 

Here in AK I have been using Johnson’s Paste Wax for decades for metal and wood protection. A few years ago I switched to Renaissance Wax. It is a better product for firearm use IMO. A small can will last you a lifetime. As far as the rear sight rusting, spray some Boeshield T9 on it and wipe off the excess. Do that every time you clean and the rust problem will go away.

 

Welcome to Sig Talk.

Not sure what could have caused that. I’ve never had rust on my 365 that’s also over a year old.
I did experience rust on a 12 round 365 mag that was brand new a few months ago.

First time I experienced rust on any of my mags. I believe in my case it was from carrying the mag in my pocket this summer and it got some moisture from sweating or maybe contaminated from something in my pocket. I usually carry a extra mag in a IWB mag carrier but it was printing a lot when wearing slimer fitting
t shirts this summer.

I too have a few 12 rounders that have small spots of rust. I’ve never had any Sig mags rust, a little concerning.

 

Not flexing here but I have 5/365 variants. Some are 4+ years old and none have rust.

A gunsmith of 40 years told me about this and, well, his experience has paid off.

After cleaning them post range trip, I thought they were clean using several different products... nope!
It cleans and is a dry protective lube for both the inside and outside of firearms.

No idea why this isn't well known?
Well, at least to me... until awhile ago.

Eezox Premium Synthetic Gun Care (7oz Spray Can) Amazon.com : Eezox Premium Synthetic Gun Care (7oz Spray Can) : Gun Lubrication : Sports & Outdoors

 

I have not had rust problems, I carry it every day but I also tell you that from time to time even when its clean, I give it a coat of Remington oil, which is very dry and does not stain.

 

Similarly, I wipe down my EDC with a silicone cloth when I take it off at end of every day.

When I clean it, I put a drop of oil in/on mag release with a needle oiler.

 

No idea why this isn't well known?

Tricholoroethane (aka Eezox) is/was an industrial solvent in wide use, until it was identified as an ozone-depleting substance. It's not something that folks would see in the same scale as in years past. It'd be my guess that that's why it's not as popular in general use, as it used to be.

Same for Carbon Tetrachloride, which used to be put in fire extinguishers. You don't see that any more. Good solvent though.

On topic: I have TCE (Eezox) and use it sparingly on new mag bodies (in and out) when new. It hadn't occured to me to use it on sights or the mag release, but that is a good idea. I'm don't have sweat that corrodes things, as far as I know. Still, good prevention.

Rennwax is good stuff, I use it on a blued 1911, mostly. Paste wax would probably work as well.

 

Eezox is chlorinated, which is bad for guns and really bad for people. As the solvent breaks down, it releases chlorine which can cause stress corrosion on metal parts. Ruger learned that the hard way when they used a chlorinated lubricant to lube the threads on Redhawk barrels during assembly. That and Eezox just smells plain disgusting…like cinnamon and cherry cough syrup.