Can You REALLY Fix Rust Holes with Foam? Watch This!

Tired of rust eating away at your classic car? We put expanding foam to the test on a rusty 1989 Toyota truck to see if it's a real fix or just a myth. This video shows you step-by-step how to use expanding foam for a DIY rust hole repair, along with the pros and cons. Learn if it's a cheap alternative to welding, and see exactly what happened to our 1989 Toyota!

[@johnnyvegas5681]

wasn't expecting the dry humor and you made me laugh way too loudly at an improper time..thanks for that lol.

[@pdl1921]

Air flow channel.. I spit my coffee out.. bravo.. love the humor

[@mwh3227]

I tried this with a few small changes: 1) use a rust conversion product to stop the rust from spreading 2) apply foam, let cure and smooth 3) apply a layer of JB Weld, let cure and sand 4) apply a thicker layer of Bondo over the JB Weld, let cure, and progressively sand 5) Prime with Rustoleum 2x paint 6) progressively sand to finish7) Spray final paint color and progressively sand! The foam technique is amazing!

[@gregt722]

Can’t pass safety inspection with rust holes. No one wants to dump money into a beater. Only thing I would do differently is fill the cavity with fluid film first, then spray foam. Keep the rust at bay an extra couple years.

[@neilyakuza6595]

I sid the same for my 2001 Jeep grand cherokee for the lower rocker panels. Used fiberglass and bondo. Worked great!

[@triedhardbutblessed]

Great tutorial !!! Many thanks and many Blessings to you and to your loved ones!!! I highly appreciate your time, effort and interest to share your knowledge and experience with everyone who can respect themselves by being capable to say at very least, a very honest “Thank you !”

[@frederickralston1842]

Worked great. I used some wide painter,s tape to hold the foam up in the rocker panel till it dryed over night. Then trim and Bondo.

[@jimsix9929]

it does help to spray inside the panel with zinc primer before doing it, it will last longer

[@diverdave4056]

I did a few spray foam repairs over the years on my 2001 Honda Accord ... and it worked GREAT ! I was still driving it with 471,500 miles on it - when 1/2 a tree fell on the roof of my car as I was driving it = TOTALED

[@LordFlashheart1]

at least you didn't spend a fortune on welding then

[@KorUpTED-Youth]

A 2007 Honda accord is what lead me here today

[@zx56vb]

hi im just wonderring how long did you used the foam? is it rust?

[@diverdave4056]

@ 5 years

[@misterbojangles6205]

I've used 'black plastic roofing cement' 5 weeks later it hardened like steel. Good vid champ.

[@Mike-vt6is]

Yep same I add a couple extra steps use fiberglass mat and prime it. Also sand it down before hand with a flap sander on a angle grinder to get the rust out

[@codyswilley]

I sprayed the floor pans of my 87 suzuki samurai with foam this morning and it's already a huge difference driving it. Not as load or cold lol. But I'm going to be cutting the old ones out and replacing them this summer.

[@MikeBurns-bi5xj]

Excellent presentation and craftmanship dude

[@michaelparker2016]

Thanks, you did an awesome job!!

[@Odipodi]

I've done this before. How i prevent rust from returning is to inject old gear box oil in and around the foam with a syringe. While you're at it, inject oil into your door wells.

[@jimsix9929]

yes it will not last long but to get an old truck looking good I am all for it, yes I have done it before, you will have some bubbles next year but it will be a long time before it looks as bad as it did, can not treat all of these old beaters like show cars, just make it look good for a few years as cheaply as possible

[@jonathonschutt5561]

Literally all I want to do. 91 chevy be rusting hard a Lil bit of this and bondo and fluid spray will do the job

[@terryrideout7457]

Good video.u accomplished what u set out to do..God bless u

[@nunyabuziness8421]

For all you experts on foam in the comments foam is a very strong adhesive oil-based and it will not lock in moisture it'll keep it out and it will stick forever and also is a great sound deadener just get some on your hands and let it dry and see how hard it is to get off😂

[@mjolles1976]

Awesome. I am going to be doing this to my 04 Mazda 3. It’s my winter rat.

[@brandiszablewski5880]

love this & going to try on my rusted out TOYOTA!! Thanks for being adorable

[@JayJay-ii5un]

Foam is oil based. It rejects moisture. Excellent fix.

[@marcussherwood1141]

You made me laugh like 5 times within the first minute man. Good job lol

[@roberthay8706]

I used expanding foam on my oldworks pickup smoothed it down and painted it with underseal.lasted until I sold it a couple of years later.

[@franksmith2981]

I love this guy he's so funny but his expanding foam body filler actually works quite well I've used it on many old cars me and my friends even have a nickname we call it extreme body filler I know what you're thinking I would not use this on a Mercedes or some newer car but on an old car or beat up pickup truck this stuff works miracles😅😅😅😅

[@Ozarkfirewoodandlawncare]

Great video!! Thanks

[@peterszenkowski7769]

this works perfectly fine, i been using this method on my wok trucks for years, all those fools saying it will hold moisture and it will be back in no time have never done this..last time checked rust starts on the outside, foam is on the inside.go ahead go to that body shop and get that bill.

[@herbiehusker1889]

Wow, you have a wok truck? A truck just to carry your chinese cooking pot in? That's cool.

[@Nick-zp3ub]

I'm assuming you live in Arizona or California. In a temperate climate rust often forms from water getting inside the coachwork. Left untreated, the car will corrode from the inside. Especially if it's Japanese.

[@mwh3227]

use a rust convertor prior to using the foam

[@Nick-zp3ub]

@@mwh3227 A rust converter isn't enough. Over time the foam will shrink, tiny water droplets will enter through the gap and the metal will rust around the repaired area. The only way to fix rust holes is to grind out all the rust, weld in a new piece of metal, skim with body filler, sand, primer and paint the entire panel

[@jjm2069]

Yea well this shit doesnt work where it snow 6 months out of the year

[@WebenHad]

Looks great from my house !

[@dalehammond1704]

Actually your body job looks better than a big nasty hole. And it probably will help preserve the truck. Nice work I say. The catastrophic increase in repair/body shop charges the last couple years means DIY or hire some local person who does repair work on the side at a bargain price (they're out there). It's either this or go without. Times are tough, especially for young people. Nowadays it costs $70 in our area just to have a garage check your car out. A few years ago this was free. Videos such as this help a lot of poor people.

[@RobertVenn]

Funny guy, good for you mate, happy with it thats all that matters!!

[@raulmezquita8778]

Excellent

[@marblesrichard]

Not getting rid of all the rust will only return very soon

[@springbean19]

You are some craic boy. My 16 year old Skoda gonna love that shit.

[@Trthsker24]

Haha I drove a SKODA in England as a rental back in 2004.

[@billmadle1235]

It will work for a needed repair,

[@tookalook1]

I think its great work especially your sence of humor. I've even used metal tape below the bodyfill

[@ricksgt2012]

Mission accomplished

[@anthonymauger9388]

Holes gone ! Mission accomplished ,have a beer

[@CentralOhioWedding]

"Hey Bud" 🤣

[@christopherschleeper7186]

I think i would have used fiberglass first. Then, the body filler to smooth it out. But, I get it, it a beater truck and you just wanted to fill the whole...

[@aaronchastain4668]

Use kitchen plastic wrap to have the foam cure with a smooth finish.

[@deancitroni4447]

Give me some ideas. Thanks! Think I'll take a small piece of aluminum foil to create the profile from the existing good piece add some fiberglass tape and resin. Let it harden and use it as a mold for the Bondo

[@HamsterBall-p2y]

Where can I get this expanding foam??

[@donnarussell4217]

I'm a 64 year old women and doing better then that.

[@joshlepley1306]

Lol 😆

[@triedhardbutblessed]

I’m pretty sure that almost 64 years you were better than anyone around you. That’s absolutely amazing to be able to keep it up with those fantasies for so long. I know you’ll never ever give up on that because you’re the strongest, stubborn woman on that too.

[@Jaquim-cb8ip]

I bet u can do all better then our buddy in video😂

[@Jaquim-cb8ip]

😂

[@tipatlittle2602]

Is it the fact that you are 64 y or that you are a woman that make it special ?

[@24revealer]

Spray foam is a good way to turn rust into rot as it holds moisture. Fix it right and oil it really good.

[@Car_paint_er]

I fixed a geo storm like this and it actually held up for two years. I told the guy it wouldn't last a week. Actually surprised me 😂 I'd lose sleep repairing it with foam now. Some of the local used lots around me actually get away with doing that but most people also don't know what they're looking for. Same as when people panel paint. It drives me crazy. I always point it out and they get mad at me. I just say I didn't do it 😂. People suck doing it that way unless they're just trying to get another year out of it before junking it

[@jamesmahle1259]

1. It's a farm truck. 2. Spray foam does not hold moisture. Welcome to the RUST BELT.

[@nunyabuziness8421]

You're spreading misinformation because that is not true I've been using it for years the rust stops Dead with it😂

[@24revealer]

@@nunyabuziness8421 Don't know where you are, but here in Ontario Canada you do this and it will turn to rot within a year. Seen it wit my own 2 eyes.

[@twinbee4243]

That never happened in my Pickup Truck I have no corrosion and rust under the chassis it's all clean. The first thing that I did after I purchased my brand new truck is to bring it to the paint shop and have a Under Chassis Anti Corrosion and Rust proofing Paint. I've spent $1200 for it and it's well worth it. Now here it is fast forward 18 years and my truck shows no signs of Rust and Corrosion and I live in Colorado where Winter is so brutal every year plus the Salt or corrosive materials that the Highway DOT are using to clean the snow and ice in the highways after all the under chassis of my truck is still in good shape.

[@31terikennedy]

Definitely use rust converter so everything sticks better. Foam makes a good backer but you could use drywall mesh tape and metal body filler then plastic filler.

[@shields_movers]

He meant well. But this is not a cure for the problem, it's just a band aid... The rust is still there.

[@KadeStringer2.0]

I would use foam , flex seal , and bed liner to make it look good

[@raulmezquita8778]

I subscribe Very nice 👌

[@ravenstone366]

Have you been up in snowing weather??😂😂 NO vehicle makes it without rust🎉🎉😂😂

[@hozerdzyou]

first couple of coats use Duraglas fibers glass filler than bodo its water proof

[@Timmy-h4q]

Seems legit

[@michaellambert5223]

Tape a hunk of wax paper to kinda form fit then shoot foam in a hole ya make. Think injection molding 👍

[@patrickstarnes2355]

Read the cans instructions Turn the can other way up !

[@MCTeck]

If anyone wants to see other uses for spray foam,go to> www.youtube.com/@JustRolledIn

[@johnmorrison1180]

In my experience spray foam accelerates the rust so this will last a couple of years then the hole will be twice the size.

[@garybulwinkle82]

I bought a tractor repaired this way, and I sued the guy!!!

[@neilwalsh9637]

Too bad they didn’t make expendable bondo/fiberglass like that……….

[@Sigspearthumb1]

I've heard if you put tape across the hole after you reclear coat with the foam, when you pull it off, it'll already be straight and flat.

[@blueovalfan23]

seems like that would trap moisture. i'd think a fiberglass patch coupled with body filler would be the better fix. i guess if it works, it works. personally though, i've been more fearless in terms of ability. i would encourage you to do the same. buy a welder and figure it out. that's what i did. turns out, it's not that hard to do. i'm not a body man by any means and welding with a flux core on 1/2 rotted sheet metal is an artform more than a skill. after ya get the trick though it's simple.

[@howardsmith7950]

Almost had me there lmao👍

[@GrumpyMonkey69]

Listen anything can rust if you don't properly take care of it.

[@dha588]

Isn't the water going to get trapped in there with the foam? This will cause more rust over time.

[@GrumpyMonkey69]

You need to use some POR 15

[@urignorance2922]

They pond and stone spray foam it is wateproof and more dence

[@RyanLindahl-u5l]

You have to use marine Foam

[@keithgore5896]

this is only a temp fix

[@Dukerdr]

When you start a video by saying "Toyotas aren't supposed to rust...", I can tell right away either it's a parody or you don't live in Ohio. I've seen lots of Toyotas rust. Nissans too.

[@deanwattles8722]

"Fix" rust? no, no you can't

[@BigBenny24]

It will come back later. 😂 I cut it all out, weld up new.

[@mecanicman66]

You sure can but bondo will crack not long after body job is done

[@miltonbiletski278]

Why do you call it a fix when it’s a band-aid for a month or two? I’ve done bodywork for 40 years and it always comes back just like the cat . Ive seen everything anyone has tried to do . Just go buy a new panel or pay the price to have a pro make it

[@LinusScrubTips]

Toyotas are just like chevys! Never rust! 😂

[@matthewmoilanen787]

The answer is NO.

[@SamusMaximusSMXD]

No you cant fix it in this manner but you can half ass the repair by using foam and making sure its unsafe

[@markiemark3003]

Slather it with mud 😮

[@peterhallock9486]

It filled the gap in the clear coat WTF.

[@jamesbridges210]

Rust is another name Cancer

[@kingtut5923]

what the fuck is it with the noise

[@kengrimsley4172]

Close enough for government work!

[@stevendavis7079]

6 months and hole will be back

[@RusticRevs]

I hope so or, even sooner. I love experimenting so I’d love to try something else later down the line.

[@joshlepley1306]

No. You can not. It will only make it much worse.

[@herbiehusker1889]

Toyotas don't rust? Do I detect a hint of sarcasm?

[@TomJohnny-zz4dp]

What's the biggest butcher job you could ever do😂

[@russellsalvador1620]

Just the way you spread the filler on, told me you was not an expert.

[@danieltaylor4819]

Yes, you can fix a rust hole with foam. It will rust out again very soon though.

[@ericdoris8852]

Nope. The foam traps moisture and rots from the inside out. No different than armor guard. Moisture traps behind it and rust starts. Stop trying to do it cheap. Just do it right.

[@petroflorence7962]

Shit filler will crack after coz flex

[@the1andonly]

The foam is basically a sponge, holding moisture and causing the rust to spread even faster. You're bettor off leaving the hole.

[@labooratorija]

I think you know not much about a foam. Or your knowlege is a bit too old. Theres a foam for outside use, even -30, +50. Ppl use it to isolate windows, or smth like that.. you can spray it on the ground and come to check 1 year later. Then you see that its not like a sponge. And if you cover that foam with rubber, or fiberglass, it can last for very long time. But you need to remove old rust as much as posible.

[@the1andonly]

@@labooratorija I use foam to seal and insulate houses, not on cars. I will keep using proper materials on cars, not foam.

[@Drop_N_Chop_LLC]

You can use foam as a replacement for concrete on post . I don't think there is anything wrong with using this as an alternative on a budget . Get it looking nice and sell it to someone else ​@@the1andonly

[@williams6756]

Hay gm trucks rust out just as bad

[@Nick-zp3ub]

Foam filler blows out after a few months because it holds water and will corrode the remaining sheet metal until it becomes brittle. The only way to fix rust is to cut it out and weld in new metal

[@TheGuyOutdoors1]

The answer is NO if you live anywhere there is moist ure. 😂get a better job with chicken wire and Bondo.

[@BR-ho8nk]

Really terrible! Is it a joke?

[@krisztianomboli3972]

😂😂😂

[@pyrpuppies]

I got my girlfriend some in that big gap filler.

[@williamshelton9688]

Interesting work…terrible music !

[@tonyfurneaux3399]

This will last five minutes if you are lucky, get rid of this truck. You did not allow for thickness of filler, or should I say thinness, where is the strength...Just saying, also foam holds water, so will make a very bad much bigger hole soon.

[@dissociativecat7495]

don't do it !

[@fishermansbuddy3785]

Spray foam cheater 😮

[@jasongervais879]

Butcher

[@JMPWILLIAMS]

95 forerunners till 2014 are known to rust underneath!! I put bedliner underneath my Nissan Xterra, that is known not to rust an eighth as bad as the forerunner of years mentioned.

[@michaelcarriere2201]

This is the worst thing you could do to your cars body

[@jamesdavies3289]

You need to come to Saipan where Americas day begins. Everyone owns Toyotas and they all rust severely.😂 Welcome to the tripics. 🌴