What is the Best Rust Preventative? - 6 Month Update 

I like the fact you're moving onto recommendations. You are not 'just' some dude on the internet, you've run a decent test, and consistently sought feedback as to the method. Don't be afraid to name winners, that's what viewers are seeking clarity on

Thank you for doing this work. It saves the rest of us from the trial and error method of selecting rust preventative.

I am amazed by your results with the WD-40. When it first came out in the early sixties it was quite a good product but in a few years they changed its formula (ala 'New Coke" You could smell the difference big time! The new formula was heavy with the diesel smell.) to its detriment. I am seventy three years old so I have quite a history with WD and I keep it around for its convenience as a cutting fluid with aluminum and that is the only place I have found it to work. I still vividly remember storing my tools during a move and spraying them with it. Every one especially those with cast tables rusted almost immediately despite being in a closed storage unit (though unheated). Then there was the time in the fall I didn't have anything else handy on my 34 foot boat with all the glass fuse panels (12v) inside the cabin so I sprayed WD on them. 95% failed when we did the spring outfitting. 95%!! I had to clean three dozen glass fuses with a pencil eraser on the contact points. A long and frustrating job but they all resumed working. After spraying them with CRC they performed for several years with no problems. Well I could go on and on (I have a flat learning curve, I guess but the damn stuff is cheap and the spray can always seems to be lurking when I go to lube something!!! Happily I can report I did learn and for the past two or three decades I haven't been disappointed with its performance because it has stayed as a cutting fluid and or a cleaner, never as a preservative or rust preventative. So firmly did it implant in my grey cells that I have no desire to even try their "new formula". I have enjoyed your test video.

I've made quite a few mistakes in my life, quite a few. But I don't feel like as much a loser after realizing I chose LPS3 over 30 years ago to protect my little teeny lathe (also a mistake - should have gotten a larger one). I had to have seen it used at work. No way I would have known about it otherwise. I admire folks who stick with the commitment to test something for months and then take time to make a good video about it!

I’ve long been a fan of Cosmoline especially for deep storage items. Aside from machining aluminum, I’ve given up on WD-40. It’s become the perfume that just lets everyone know you’ve been doing some work in the garage. Impressed with the LP3, may have to pick that one up. If I recall correctly I believe Robin is a fan and used it inside a spindle for corrosion protection. That’s an endorsement all in itself.

Please bring us back in September. For an update. It be nice if you have the cans on top of the samples as we talk about them. Just more of a visual affect.

Thank you for the valuable insight, Mr. Stuart

Very informative like the previous updates. +1 for a September Update

Fluidfilm is liquefied paraffin wax which is why it stays stick - works pretty well and you are 100% right it collects dirt but all surface only

I am really surprised about the Boeshield. Good work, Stuart. And +1 on the Sept update.

A september update could be interesting to see what the sun does on these products. And I'm surprised how well the regular WD40 does. Knowing that it's not it's first purpose.

I retired from a corporate research lab and a colleague did a similar test several decades ago. The best performer he found was lanolin. He gave me a spray can of it, I don’t recall the brand name anymore, but I sprayed my drill press column and other parts probably 20 years ago and they are still rust-free. It is tacky also like some of the others which is somewhat of a nuisance, but it is tenacious against rust. Not sure where to get the stuff though.

Very good info,Stuart.Thank you and happy summer.

I like the lps3, it’s very resilient to coming off

The best rust preventative I used is made by ZEP. It is called, IronClad. It is hard to find in single cans, but the stuff works really well and lasts forever. I use it on my milling machine. I like to spray some on the table before I mount the vice to prevent rust.

Really informative Stuart. I would be interested in a September update. I'm really surprised on how Boeshield really failed. Thanks for doing this experiment!

Please add a September update. Great, exceptionally useful series. thanks

Thanks for doing this experiment

Thanks for your video. Just in time as I am looking to coat my new utility trailer rims.

Thank you for getting to the point clearly. September please.

Yes for September please. Front passenger floorboards rusted through in some old car I had in the 70's. Good times.

Stuart - I'm impressed. Great video ! --- Jim

Keep up the good work! I'd also like to see the 9 month results.

A friend of mine that restores Hudsons uses PAM cooking oil. I think it’s canola oil. After he has removed the paint on the old fenders by bead blasting or acid dipping he sprays them down with PAM. His words are it is cheap, it works, and it washes off with soap and water. They are stored in his barn so probably experience similar conditions as you indoor samples.

I would love a September update. The worst rust I've ever had on a car was my 90 2.5 turbo shadow. I'm surprised that the right front wheel stayed in place, as there was virtually no strut tower left when I scrapped it.

Tung oil or linseed oil would be nice to include if you do another run of candidates. That's the "good old stuff" (and cheap), so it's kind of a baseline you need to beat. Usually wiped or brushed on though.

Thank you so much for this work!

Damn, this is really causing me to rethink my last Boeshield buy. Not assuming you’re going to do anymore rust testing, but… I would love to find a test of traditional tool box drawer methods for corrosion prevention. Pennies, camphor blocks, desiccant packs, etc.

Can you consider adding a 'dry' rust inhibitor marketed towards guns like Bore Tech Shield XP, or odd ducks like Renaissance Micro- Crystalline wax polish?

People usually like to hear.....Nice job

Thank you. Very very useful for me

If you planned on doing a second set of test strips or something, I'd really like to see what would happen if you went over the test strips w/ one or two swipes of a wide angle pressure washer to simulate going through a car wash or just a deep puddle at speed like what the undercarriage of a vehicle would typically experience.

Good work, Appreciated

Thank you for this video! In your opinion, which one would work best for an outdoor fan? I’m in South Florida. Though sold and labeled for outdoor use, the last set I had didn’t hold up well. Would like to protect the new set. Thanks in advance.

September is here as we await an update. Was T4 motor oil considered for testing

Thanks Stu 😊

I would like to have an update in September.

I wonder what WD 40 Silicone spray would do and would it make a difference if you worked the spray into the metal pours a little if that would make a difference. I have an E bike and looking to protect the chains and rims last year my bike rusted in those areas through the Minnesota Winter. oh hey what about white lithium grease or spray it mite not have anti rust properties but it stays on a long time offering protection from the elements rub it in see what happens I use that for squeaks it staying power long outlast WD 40.

Thank you, looks like I’ll need more Wd-40 lol.

Hi. My kids trampoline is starting to rust. It's just superficial rust spots. Do I sand paper that off first before spraying on the WD? We don't get Fluid Film or the LPS3 in South Africa 😢

Hi Stuart, 6 months ago I told you that I cleaned off the top of my welding table with a cup stone on a 7" grinder which left many bare spots open to the elements. I sprayed it with CRC Heavy Duty Corrosion Inhibitor and left it open to the elements all winter. At first I put a shim under the legs so the water would drain off, but after I wrote you in March to tell you there was no rust on the table, I took out the shim and left it flat. The only rust now is a small area where I welded a bracket with my MIG a month ago. It looks like the spatter is what rusted, but I haven't wiped it off yet so I can get a picture and send it to you. Is there an email address I can send the picture to?

I would like to see test pieces with Used engine oil, clean engine oil, and ATF.

do you respray them everyday?

Any advice for a plant trellis? Would be hard to reapply.

Maybe post the price you paid for each can so we can make a better decision depending on how much we need?

Stuart have you had any experience with cryogenically treated HSS drills. I would be interested to see how they compare to regular HSS especially on Stainless 304 and 316.

Why did the chicken cross the driveway? To poop on the locktite of course... sorry, yes please for September!

That's what SHE said ! Don't BLINK . . .

Can I use one of these sprays on an indoor aluminum window frame thats rusted. I can send a photo?

W-D 40 doesn't do nearly as well in the south. Things will rust inside a garage with wd40 on it

Maybe a road salt spray ?

would you recommend me these for motorcyle tanks? im cleaning out all the nasty rust and need to put a coat to prevent rust

2:02 damn the swag is outa this town

so what do i spray my snap hand tools with?

Does anyone else see the dog's head, below the screw on the Loctite PC9660 sample? I think it's a labrador.

Thanks for your work!! What a sucks this Boeshield T-9! And how difficult it was to get it in my country .. Now, when it came to processing the bicycle frame, I decided to see how best to do it and I see these tests, yours and others .. And literally every Boeshield T-9 is the main loser. Sucks. Silly purchase. And what drove me .. and yes, probably their slogan is that they lubricate Boeing aircraft)

alot of people recommend Ballistol in my part of the world

Sta-bil rust stopper

I wish I was a little English sparrow I wish I was a little English sparrow I would sitty on the steeple And I would shitty on the people I wish I was a little English sparrow.

Conclusion bird poo is the best rust protection

Overall good video well done but please. Preventive! Preventative is an invented word. Yes it is in new dictionaries but not in early 1900 dictionaries. It was put in more current dictionaries due to common usage or misusage.. however you want to see it.

One word. Fishoil. Smokes them all.

Poor dumb bas…s. Regular WD40 is better than cosmaline?? Really?? BTW, try Chain Wax spray. It’s as good or better than CRC Marine Corrosion Inhibitor spray. BTW. Fluid Film is great on your chassis, only if you want to reapply it every 3 months.. Try the Chain Wax spray. It blows all of these products away, IMHO (absolutely no affiliations, just my experience).