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Kroil for rust prevention?

MarkInPA

Well-Known Member
Joined
Jul 8, 2024
Messages
235
Location
Mifflinburg, PA
Curious if Kroil is good for the final step in bore cleaning for rust prevention or if a different oil might be a better choice? I know the Kroil is sometimes used in conjunction with JB Bore Cleaner to clean the bore. I guess its properties for penetrating the steel aid in the cleaning process. Just not sure on the properties for rust prevention.
 
Something else related for discussion. Concerning the new Thoroclean and Thoroflush, are these really new bore cleaners or are they just reinventing the wheel from Kroil and JB Bore Cleaner? They seem to be very much the same to me. Not sure which one might be better.
 
I've used it for years, but... couldn't prove it's better, however, it seems to work for me. Many of the Palma, F-Class, Military & Swat snipers guys I've known over the years have used it as well. I still use it. 😉 🤙 Cheers

Addition: I should have mentioned "only" in the bore. Frank in the Laurels is correct.
 
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..if it's a hunting rifle just don't use it...it'll gum up your action slicker than -hit....especially the trigger....I found out the hard way in season...
I think I saw on another thread where you recommended lighter fluid to clean it out of a trigger mechanism. I'm usually pretty neat about cleaning my firearms though. I don't get a bunch of cleaners slopped where they don't belong. Always use a bore guide. Only thing I would be concerned about is if you had left extra in the bore and stored the rifle upright. Possibility of it running down into the action. Still point well taken.
 
I think I saw on another thread where you recommended lighter fluid to clean it out of a trigger mechanism. I'm usually pretty neat about cleaning my firearms though. I don't get a bunch of cleaners slopped where they don't belong. Always use a bore guide. Only thing I would be concerned about is if you had left extra in the bore and stored the rifle upright. Possibility of it running down into the action. Still point well taken.
It took many many cans of lighter fluid to cut and dissolve Kroil when it thickens... great cleaner for my PPC's, BR's and Dashers, bench guns, but I won't let it touch a hunting rifle again...
 
Curious if Kroil is good for the final step in bore cleaning for rust prevention or if a different oil might be a better choice? I know the Kroil is sometimes used in conjunction with JB Bore Cleaner to clean the bore. I guess its properties for penetrating the steel aid in the cleaning process. Just not sure on the properties for rust prevention.
It's a penetrant. I use it as a part of the cleaning process only. I use Clenzoil as a final step and protectant.
 
The reason Kroil "gums up your action" is the same reason WD-40 does it. They're penetrating oils and they will dissolve thicker oils or pastes and you'll end up with a gummy residue you will blame on Kroil and WD-40 if you don't keep removing it and applying more penetrating oil until that old gummy stuff is gone.

If you continue to use either one you will eventually be left with a residue free metal with a fine coating of a rust preventative penetrating oil.

They both are lubricants but not the greatest for that. I use WD-40 a lot in rust prevention on guns and almost everything else but for true lubrication on gun parts I use products specifically designed for such use.

Back in the 60's and 70's when a lot of gun oil manufacturers were having a hard time getting people to use their products rather than the much cheaper and more versatile WD-40 and they spent a lot of money advertising their products with gun magazines so the writers for said magazines started coming up with a lot of not so well founded reasons to not use WD-40 and promoting advertisers gun oils.

That became "common knowledge" and like a lot of common knowledge it survives for many many years and may or many not be true or applicable to lots of things.

Nuff said.........
 
For barrel bore/action rust prevention I have found thin coat of WD-40 or WD40-Specialty keeps my firearms(including black powder), absolutely rust free…For as long as decades. No gumming or varnish which ai have experienced with Kroil . Easy removal with Hoppes…..
 
When I was a kid I worked at a little gun shop and the owner used Rusteprufe.
He had re-barreled a crack shot with a carbon barrel in the white. Treated it with the aforementioned stuff and for years it remained rust free sitting in a gun rack in the shop. I have been using it for decades now on every type of gun I own. I've never had trouble with triggers not even 2 oz jewels I had in all my match rifles.
 
I used Renaissance wax on a little Kimber carbon steel and wood rifle on an Alaskan coastal black bear hunt. It protected it well from the daily sea spray while on the Zodiacs. Still used a dry cloth to wipe it down once back to the main vessel. Still looks good to this day.
Got it at MidwayUSA.
I do use Kroil inside my barrels as a soaking/bore cleaning step. But I'm old school and still love the smell of Hoppe's #9 down the bore to finish!
 
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