I put 3 jugs of coolant in my vehicle and it was empty the next day, saw massive puddles on the driveway, bought k seal and it almost immediately sealed the leak.. wasn’t sure where it was coming from … I highly recommend

August 1st 2022, I used it for a semi truck Volvo VNL 670, 2 bottles for a 52 gallons of coolant, today August 2nd 2022, the small coolant leak coming from I don’t know, is gone, K-seal works super well, thanks body for the video, It saves me a lot time at the mechanic, plus fees. 👍👍😃😃

I used K-Seal in my 2004 Town Car to fix the Heater Core and it worked like a champ! Thanks for the review. It was quick and easy to do.

it works #1 seller in the uk and world...i tried it work on my car saved me 1000us i drove it home after i use large one ultimate in my car drove 20 minutes it drove good no problems..this a miracle it cost 40 us for large one.

It works great on heater cores. 4 years back I bought a 1997 V70R and the smell of coolant and misting was quite intense when you switched the blower on full. A bottle of this stuff fixed it in 2 hours and it's never done it since!!

I had a leak but did not know where it was coming from. I tried the K - Seal and it worked immediately. Bottom Line... This stuff works!!!

Wow your a true pocket saver friend, thank you very much for the upload, my car was overheating two days ago and I didn’t know exactly why, took the car to my mechanic he says he “Thinks” it’s a leak, charges $250. I can Now save PLENTY of $$$$ by buying this product instead. Again Thank you very much my friend VERY HELPFUL😇💜

All of these comments and videos that show it working makes me feel better. Just discovered a leak somewhere(and not knowing where it was coming from) but the suspect was definitely the coolant, as I noticed after filling the reservoir not too long ago and only go to work and back with vehicle I found the coolant low. So I bought this and followed the instructions.. it all just sounded too simple and good to be true 😆 I’ll be looking at the reservoir later, but I’m glad to know I’m not the only one that learned about this on a whim in an effort to save hundreds of repair costs.

2001 CVPI - I used K-seal for a small heater core leak after watching this video, worked great no problems. 3 weeks strong so far.

I bought a 289 2bbl, automatic '66 Fairlane 500 convertible a number of years back. First time on the interstate, running 70 mph for about 25 miles, it ran hot. Cooled down, removed thermostat, put in coolant, etc and paid closer attention and quickly found it getting too hot again. It was okay at 55, so I drove home at 55. Investigated and the radiator would only barely flow water out when I took the lower hose off and ran my water hose in the top. Bought a new radiator, hoses, etc and it barely got better. Volunteered to drive one of a number of "festival princess" kids in a parade. Less than 1 mile took about 45 minutes and it was running hot again. Cold weather came and with the car at above 180 degrees, no heat. Pulled the heater core...not a drop of water came out when I tested it. Replaced core, heat is good. Running down the road above 55-60mph and still getting too hot. By the end, I replaced all hoses, the radiator, heater core, thermostat, water pump and the belt and yes, I made sure to check the engine timing, etc. My conclusion is that if, over the years you put enough stop leak in a cooling system, you will have deposits of it all through your cooling system and the solution might be to hot tank the block, heads and intake manifold to clean that mess out. I don't know if that will actualy work. So, yes, I am certain stop leak treatments work. I will NEVER put that cure for leaks in anything else I own. This story is not made up. When I sold the car, I told the couple that bought it that it did not like running over 55 mph for any length of time or it will run hot. I did not make any of this up. If a heater core leaks, either have a shop silver solder it up (copper) or replace them. They aren't that expensive. Same for the radiator.

My car was leaking as if someone was pissing! I had previously fix 2 freeze plug in the same day. After I fix those, I had another leak in the back side of the engine, in which was really hard to get it to and did not want to bother with having to replace that freeze plug. I watch this video after thinking about engine coolant leak seal. When I saw this video, I had no doubt that leak seal would do the trick. I I used the same item, name K Seal after finding it at a local O'Reilly's parts store. The price was $36.... And was worth every penny of it! It work within 30 seconds!!! I have no more leaks!!!! That stuff works like a charm!!!! Thanks for the video! You would get a five star rating from me!!!

This stuff really works Thank you !! You just saved me $500 😳

Well, I watch two other videos before yours and yours was more convincing. I guess I’m on my way to O’Reilly right now to go buy some K seal Thank you brother.

Sir you made the best video on this topic I'm gonna try to share this ty

Thk goodness i found this videk, i finally got a solution, been dumping tons or coolent in my reservoir will try this in the morning got my fingers cross

Had a slow coolant leak in my 2001 gillig low floor bus. It wasn't bad, but having to put an entire bottle of coollant in every morning adds up quickly. Since its a big engine ( Cummins 8.9 L) I decided to put in 2 8oz bottles k-seal since the HD version uses 16 oz. About 2 hours into my drive. I noticed that my temps were staying lower and my coolant level hand not changed. Great product!!!

You can only say how it is. Had a bad leak from my wife V6 Mustang 1995. Tried Radweld and it didnt do anything. Went to our local Car parts store and they said use K-Seal. Pour it in as per instructions and the leak stopped almost right right away. The leak was from behind the water pump. We have had no leaks since and we put it in 3 years ago. It has also been flushed through and new coolant put in. Still no leaks. I fully intend to have a spare bottle in the trunk for emergencies. It does work believe me.

I love K-Seal, I had it stop a head gasket leak for 11K miles perfectly, up until a coolant flush.

THANK YOU FOR BEING REAL ! I Laughed AND Learned! Thank you Thank you, Also IT WORKED!

It works 1 yr later no more leaks no more overheating

I just bought K-Seal and hope it works well. Will try tomorrow.

Was kinda blown away by how quick this stuff worked. Idled the car for 15min, topped off the antifreeze meanwhile (was leaking real bad)... then shook the K Seal bottle for 30 seconds and poured in the same reservoir. Stopped leaking after a minute and was able to drive home 10miles without adding any more antifreeze. Checked it at home and was amazed that it hadn’t leaked at all! Definitely a quick fix... probably still worth replacing a leaky hose at some point, but damn. Really worked.

I used K-Seal with some trepidation after reading all the reviews and it stopped my water pump leak COMPLETELY ... has run at perfect operating temp ever since and I had been losing 2-3 cups of fresh coolant overnight into a container EVERY DAY ...

yes it does work i used it! mechanic was trying make me buy a whole motor! i don’t think so

I had a huge coolant leak on my 2005 Taurus probably the timing cover gasket I was putting like 6 liters in a day. I put K seal in and it worked I was shocked. K seal some good shit

Unbelievable! My mechanic told me that the engine on Toyota Matrix has blown gasket and that one of the pistons isn’t working. He didn’t recommend gasket change, since later on the engine would start burning oil. Anyway, recommendation was to change the engine with a low mileage. The matrix is 2009 with 180k miles. K-seal worked within 10 minutes! I poured the whole thing right into the radiator and not the coolant reservoir. It works for sure! I have no idea what’s in that liquid, but it just works!

Fixed my 2004 radiator leak. Work almost instantly, major leak stopped within couple minutes. Then let it idle for 30 minutes. I shut off . Will drive it tomorrow and give a week later update of driving on highways. So far 5 stars

Many cars have brown coolant from a chemical rx in the metal. But kseal does work! Stopped my head gasket leak like 10 years ago. Until my radiator tube came off amd my system got flushed. A year or. So later I had to buy more.

Thank you very much. Video made so much since for me.

Man thanks for this quick emergency fix

Oh wow, I MUST TRY THIS PRODUCT AND HOPE IT WORKS FOR ME 🙏

Long story short, car was overheating & I pulled into a gas station to let it cool down. Big puddle of coolant under the car. Water pump. Added K-seal and have not seen a drop of coolant since. It's been 3 days. Works great.

I had a very small coolant leak near Heater core. I used K-Seal and it worked very fast.

We had a small leak after an accident, added K-seal, the leak stopped. After 2-3 months I flushed the radiator (no leaks during the process of the flushing, when you idle the car w/max heat ~ 15-20 min). The car was sitting like 2-3 months (I did some re[pairs on it). I totally forgot about that previous leak. Then I drove it like for ~20 mi, having it in cool mode, no leaks. Next day my husband took it to work and though it is summer he switched on Heat mode, like half way, bcs he remembered about that leak and thought it would be better for a car. So car went like ~ 30-40 mi and when he came back he said he observed some overheating, when I went to see, the sign on low coolant appeared on the dash, and the coolant container was empty. I added coolant, but after like 10 mins of driving the coolant went way down again and the sign for low coolant came (again he was keeping the Heat mode on). Then I switched the Cool mode on and the coolant in the container (I added of course) remains on the same level. What that can be that the car (2003 Chevy Cavalier) is loosing coolant only in Heat Mode? Is it something w/Heater core? I don't know if the Heater core is involved, when you drive in Cool mode. I would appreciate any comments on this matter. Thank you for a great film.

Clean sand wire brush your alternator mounts then put thick grease on them. Corrosion from cooling system electrolysis on the panthers kills heater cores and water pumps

I have a Buick Lucerne and my coolant keeps disappearing pretty immediately. I can’t see a leak but figured it has to be somewhere. I just bought a new radiator cap to because i saw a video that said that can fix the issue sometimes but it’s not here yet and I just stumbled across this video today. With the k sealant am I suppose to pour in the radiator reservoir or the coolant reservoir? UPDATE***. Wasn't the cap! Kseal worked like butter! No leak anymore! Great product!!

Do you put the k seal in first ? Then start the car and put the heater on? How long do you leave the car started ?

And i just bought a heater core to replace but if this works ill definitely return the heater core... also have a condenser leaking coolant so i sure hope this does fix it all together...

After using K seal on my 2005 Honda Civic, I noticed there was a white powder on the ground the next day under my car. I poured it in the radiator with distilled water bc I hear it has to be diluted. However, what does the white powder mean? I’m thinking it’s K seal that may have leaked out I’m not sure

Great info! Thanks for another Awesome Video!

I think you know as well as I do there's no miracles in a bottle. if the heater core is got a hole it ain't going away. you're going to have to fix it correctly eventually but hopefully it gets you through the winter

It will work for blown head gasket..? Bcs coolant is mixing with the engine oil ,not like a milk shake . I already replaced the oil cooler and thermostat but am still losing coolant.😢

Thanks for the vid! Getting ready to try this on my 2013 F150 Ecoboost. Thought it was a blown head gasket but didn't see the milky oil on dipstick or oil cap. Hopefully just a bad hose...

Does this seal coolant leak that's coming from the thermostat housing

I'm going to give this to go today on my heater core theres that nasty antifreeze smell coming through the vents when the heat's on I'll keep you posted on if it works if not unfortunately I got to replace a heater core.

Does the car need to be heated up before pouring or can I pour in a normal temp car and then start it and heat up the engine?

There is coolant leaking inside my car near accelerate and brake paddle. Mechanic told me that my car heater core is leaked and needs to be replaced. I want to ask will it work for leaked heater core or not?

It really does work. It's awesome

does k seal work at all on radiator or heater core hoses that have a have a small hole in them that sprays out coolant anyone know if stop leak prodcuts work on radiator hoses or just other parts of the cooling system

I got serious leak problems in my g35 and I don't have many to spend I'm gonna try this one I hope works

AWESOME....will try it on Liberty....MOPAR 4 EVER.

Legend has it… the car is still running 😂

Do I top it off with coolant? About to do this now

These things do work if your leak is small and the coolant is clean. I used bars leaks in the wife's van. Just half a bottle. It was seeping around the outside edges of the intake gaskets. I think with this kind of stuff a little goes a long way.

Would it work if i have a radiator leak on top?

So, just into the overflow radiator thing?

Will this work if you have a leak in the water pump?

Thank you for the great video. Do I pour the contents into my coolant reservoir? Also, is this product compatible with a 99 Ford expedition 5.4? Thanks again!

Super helpful.

Couldn't find the leak on my wife's 3.7 Jeep. After weeks of draining, refills and pressuring up I tried Kseal. Problem solved.

2008 kia Sorrento. small crack on side radator. Trying now!

I put water in my car and it leaked out I saw a seal in there floating around will this fix that too and am I supposed to put it in where I put the antifreeze?

My car has a very slow coolant leak,,ot needs topping about once a month,,I'll try this method

Do they suggest to put in overflow? Or the main radiator ? Seems like it won't be pulled into the system until the car is in cooling mode and it will only be a small amount.. thanks for vid

We used this product not long ago on a 2002 odyssey . and the next day the heat in the vehicle was no longer working when its never before been a problem with it. It Would only blow cold air. To get to the point. The heater core had to get flushed to fix the heating problem. We was told the product must have somehow contributed to a clog. I guess we're the only 1 in a million who got unlucky 😢

Good job... thank you

Do you have to use it in conjunction with radiator fluid or can you use it with just water?

My car is only blowing cold air when its on heat , i have changed thermastat everything u can think of ! It never runs hot i havent noticed coolant level dropping any at all, and we have felt of the heater core houses and they are hot. Could it be my heater core ? I havent noticed any leaks or anything. Although my radiator cap is worn. Im just trying to figure out how to get my heat to work fas! Its only blowing cold air. 2004 honda accord v6 vtec

So when you added K-Seal on top of Bar's Leak, it cleared up the brown residue??

I have a 2006 GMC Yukon and it’s leaking coolant every time I add some I can drive it for a while but then it starts to heat up, I wanna try this product to see if it works. Do you pour it into where you would pour the coolant?

it Works GREAT Product!!

Does this stuff clog your system?

Hiii.. @BST Ford Channel thank you for your information. I found out that my coolant is leaking somewhere and is getting mixed with the engine oil. Now my qoestion is could that staf K-Seal fix that problem? If yes, where should I fill the K-Seal? Thank you.

Ive used 50ml this in my AC system an it worked

I wonder what the stuff is that makes it work so good...Good video,nice looking car too,,for $450,lol..

Is it safe for more modern vehicles you think? I'm thinking of doing it on my 2014 ford mustang v6 that has a small leak. I also noticed my heat doesn't get as hot until my car is at operating temperature. Any advice would be appreciated. Happy holidays

I noticed i have to keep putting coolaint in my cars every 2 weeks or so then i looked under my car and noticed the coolaint dripping slowly will this help for that

He left it running for 4 days lol

My Ford focus mk2 14 years old The heater core was leaking so bad I had to bypass it ... Do you think this Kseal will work on a badly leaking heater core ?

I need to try this

I have a 2008 Maxima blown head gasket with a lot of white exhaust coming from the tail pipes will this be a good thing to use it a waste of time?

Good job on review

So you don’t have to flush the old out first? I can only smell the antifreeze when the heat is on don’t see any leaks underneath but had fog on my windshield the other day so I’m guessing it’s the heater core.

Works!!👍

My mechanic said I have small bit of coolant leaking from the head gasket in my LS V8... should I try this?

My coolant is leaking when I pour coolant in there so u think this can fix it if I pour this in there?

My heater core is leaking and my passenger side floor is soaked. Should I just add it to the reservoir while the car is cold.

hi, 2 questions (1) will this damage the engine of car ? (2) I have empty coolant & to use this do i need to fill in coolant andthen pour K-seal to seal any leakage ? (3) should engine be hot or cold ?

Coolant leak repair estimate : $500+. K Seal : $14 F150. 5.4L. Notorious for coolant leaks. I went with the K Seal & the leak is gone.

Can K-seal repair heavy leaks? My car is driping coolant like a spring, not sure if block cracked or gasket burnt. Can I repair it using K-seal?

Some pour into overflow tank, others pour into radiator. Is one better or different purpose? Definitely have a coolant leak, and possibly heater core leak (slight fogging in winter, but I run heater only for a couple of minutes to warm up the cabin). Have Ford Focus 2010.

I have dodge caravan do I pour it where I put the coolant the silver cap ?

Stopped a pinhole leak in my Jeep's radiator in minutes!

What if my leak is coming from throttle body coolant supply ? It's a hose leaking coolant from the anti freeze tank to auto body

Thank you. Is that helps if i have fast leak?

Sometimes my heater is working and sometimes blowing cool air. Old truck, many miles. Suspect junk in heater core. Is trying K-Seal worth it?

Hi I have a range rover water pump leaking, so what you think this stuff is working on my vehicle?

chris jones london in uk tried it on his bmw he been driving over uk still working his car

Do you pour it into the reservoir tank or straight through the radiator cap?

I have a 2005 Honda Civic coupe that’s leaking antifreeze underneath the car it’s making the temperature gauge fluctuate as well should I use the k seal for the leak?