Material | Plastic |
---|---|
Brand | K-Seal |
Style | Compact |
Item Weight | 0.27 Kilograms |
Item dimensions L x W x H | 7.87 x 2 x 6 inches |
Compatible Material | Aluminum |
Water Resistance Level | Waterproof |
Item Form | Liquid |
UPC | 367157659506 812646010004 |
Global Trade Identification Number | 05060002968017 |
Color | BLUE |
Manufacturer | Solv-Tec |
Model | K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair |
Item Weight | 9.6 ounces |
Product Dimensions | 7.87 x 2 x 6 inches |
Country of Origin | USA |
Item model number | ST5501 |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | ST5501 |
Position | Inner |
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K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
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Material | Plastic |
Brand | K-Seal |
Style | Compact |
Item Weight | 0.27 Kilograms |
Item dimensions L x W x H | 7.87 x 2 x 6 inches |
About this item
- Permanent Coolant Leak Repair: K-Seal’s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.
- Versatile Usage: Fixes cracks and leaks in the radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
- Universal Solution: This coolant stop leak is universally applicable. It can be used with all types of antifreeze, making K-Seal an essential tool for any vehicle owner
- No Draining or Flushing: K-Seal coolant leak repair is easy to use. It eliminates the need for draining or flushing, making it a convenient solution. Just shake, pour and go.
- Effective Cooling: The K-Seal 8 fluid ounce bottle is effective up to 20 quarts of cooling capacity
Frequently bought together
![K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing](https://cdn.statically.io/img/images-na.ssl-images-amazon.com/images/I/71YTkZ1rAJL._AC_UL116_SR116,116_.jpg)
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From the manufacturer
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![Radiator stop leak, head gasket stop leak, engine stop leak](https://m.media-amazon.com/images/S/aplus-media/vc/e1cf8c4f-e67c-4fd1-8ffa-fe05ec72b6e2.__CR300,0,900,1200_PT0_SX300_V1___.jpg)
![Radiator stop leak, head gasket stop leak, engine stop leak](https://m.media-amazon.com/images/S/aplus-media/vc/72bc0c09-0e13-4410-a019-7514be4da836.__CR0,0,350,175_PT0_SX350_V1___.jpg)
The Safe and Easy Way to Fix a Coolant Leak
The secret behind K-Seal’s ability to repair a coolant leak is down to its contents: a specially developed blend of chemical ingredients including ceramic microfibers and copper particles. When added to the cooling system the ingredients disperse and flow freely around the system suspended in the coolant. If coolant is leaking from the system, either externally or internally across the head to the cylinders, then K-Seal will follow it through the hole or crack and try to fix the leak.
Permanent Coolant Leak Repair with K-Seal
Just Pour & Go
Coolant leaks don’t have to result in costly repair bills – simply add K-Seal to your coolant system for a quick and permanent fix. K-Seal is trusted by millions of customers worldwide, and the only coolant leak repair fluid carried by the AA, the UK’s largest roadside repair company.
K-Seal couldn’t be simpler to use. K-Seal’s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.
- Fixes most leaks in water-cooled engines
- Permanent repair for the lifetime of the engine
- Trusted by professionals
![5501](https://m.media-amazon.com/images/S/aplus-media-library-service-media/aaa76b25-a47d-4b84-bf59-95dc5aeaeb16.__CR0,0,970,600_PT0_SX970_V1___.jpg)
![Radiator stop leak, head gasket stop leak, engine stop leak](https://m.media-amazon.com/images/S/aplus-media/vc/81f145a0-9e95-4fc0-961b-90029f35c947.__CR0,50,300,300_PT0_SX300_V1___.jpg)
Coolant System Sealer
Just Pour & Go
Once the crack or hole has been located, the microfibers instantly begin to mesh together within the gap, building a seal literally fiber by fiber to stop the coolant leaking through the gap.
The particles in our K-Seal products are very precisely designed to be large enough to repair holes up to 0.635mm in size but deliberately small enough to never block any passageways or tubes within the cooling system, including those inside the heater core and radiator.
Once the microfibers have sealed and fixed the leak, a combination of exposure to either the external atmosphere or the gases within the combustion chamber and the heat within the cooling system and engine causes the K-Seal formula to cure. This results in an extremely strong and permanent seal able to withstand even the high pressures from the combustion chamber. This is how K-Seal Ultimate is able to repair head gasket failures, even where the cooling system is being over-pressurized exhaust gases entering the system
Common Coolant Leaks
K-Seal can deal with all of these leaks and more, as long as they are identified as early as possible. It is easy to use – simply shake it and pour it into the coolant mixture and it will work automatically.
Types of leaks that can occur within your car’s engine
- Head gasket leak, where the coolant is allowed to enter the engine cylinder
- Engine block leak, where the stressed metal cracks and leaks coolant
- Water pump leak, where leaks develop under stress or abrasion and coolant leaks out
- Radiator leak, where circulating coolant leaks and causes the engine to overheat
![Permanent Coolant Leak Repair](https://m.media-amazon.com/images/S/aplus-media-library-service-media/75adcbc2-ef7c-488e-ae4d-c3f8b6003e08.__CR0,0,970,300_PT0_SX970_V1___.jpg)
Product Description
Experience the ultimate solution to coolant leaks with the K-Seal ST5501, a multi-purpose, one-step permanent coolant leak repair. Our powerful formula works seamlessly with all antifreeze, making it a universal fit type for all your needs. No need for draining or flushing your system. The K-Seal ST5501, also known as a head gasket stop leak, works by sealing leaks efficiently and permanently. It also doubles as a radiator stop leak, effectively putting an end to any leaks in your radiator. The permanent leak sealer is easy to use - just shake, pour, and go. This product excels in fixing cracks and leaks in several components including the radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing, and engine blocks. With a single 8 fluid ounce bottle of our coolant leak sealer, you can treat up to 20 quarts cooling capacity. This heavy duty stop leak sealant is a must-have for all your coolant leak issues. So, forget your coolant leak worries with the K-Seal ST5501 HD. Experience the power of a seal stop leak that stops leaks permanently, offering peace of mind and extended life for your vehicle's cooling system. Trust the K-Seal coolant leak repair for a lasting solution to all your coolant leak problems.
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Technical Details
Additional Information
ASIN | B001QT9KO6 |
---|---|
Customer Reviews |
4.3 out of 5 stars |
Best Sellers Rank | #2,317 in Automotive (See Top 100 in Automotive) #1 in Cooling System Additives |
Date First Available | January 26, 2009 |
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K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of use and speed of the sealant. However, some customers have reported issues with the radiator. They say that coolant is spurting out from a large visible crack in the plastic upper body. Some customers also say that it won't fix the crack in their marine engine block. Opinions are mixed on quality, heating, value, leakage, and performance.
AI-generated from the text of customer reviews
Customers find the sealant very simple to use, with clear instructions. They also say it seals radiators quickly and easily.
"...Can't believe how easy it was to do, I pulled the radiator hose from the engine block, poured in the K-Seal and reinstalled the hose...." Read more
"Great product for a leak ! Very easy to pour into your cooling system" Read more
"...it works almost instantly, 3) directions are clear, 4)..." Read more
"...This stuff is simple. I dumped it in, waited a minute or two then put coolant in...." Read more
Customers are satisfied with the speed of the sealant. They mention that it works quickly and easily. Some say that the product takes effect immediately and that their engine runs smoothly again.
"...However, car has been running great, no rough idle, no hesitation upon startup and no overheating!..." Read more
"...It took about 5 mins and I could notice my engine running better. It’s been 3 days test driving and so far so good...." Read more
"...no overheating issues, no signs of moisture in the oil, and MPG has improved from +/- 17 to +/- 21...." Read more
"It seal the hole in my radiator. On my 2005 mazda mpv. Very fast. The product worked very good." Read more
Customers are mixed about the leakage of the sealant. Some mention that it stopped the coolant leak, while others say that it started to leak externally.
"...It repaired a very minor leak in an original 1937 Chevy radiator, another small leak in a 2015 Chevy Sonic, and as a preventative in a brand new..." Read more
"...of warranty I may add, the engine would smell of coolant and started to leak externally. I was going through a gallon a coolant every couple weeks...." Read more
"...instructions, poured it in and drove around for about ten minutes, no more leak. It’s been a couple of months problem free...." Read more
"...No leaks on the ground, but there was white smoke coming out the tailpipe and around the base of the engine, so the issue became quite severe very..." Read more
Customers are mixed about the performance of the sealant. Some mention that it works very well, while others say that it didn't work. It also doesn't seem to work for faulty hoses or if you have oil in your coolant.
"...The coolant hasn't leak a bit and the car runs flawless.Even my mechanic can't believe this stuff actually worked...." Read more
"...Update: 6.9.2024 - Vehicle is still running well using the approach I outlined above roughly 2,500 miles later...." Read more
"...The coolant / K-Seal mixture instantly clogged up and broke the pump. This was concerning to me as that was throughout my entire cooling system...." Read more
"...However, car has been running great, no rough idle, no hesitation upon startup and no overheating!..." Read more
Customers are mixed about the heating of the sealant. Some mention that it works by getting very hot, circulating towards holes and gaps. However, others say that it loses coolant and the temperature increases and eventually overheats.
"...of smoke nor any bubbling in the overflow reservoir; my heater was running nice and hot too. Since the prior update, I have not used any more K-Seal...." Read more
"...UPDATE: 1/11/17 Well, the engine miss has returned, anti-freeze is disappearing again, head gasket is leaking again...." Read more
"...been running great, no rough idle, no hesitation upon startup and no overheating!Coolant level has remain the same after couple weeks...." Read more
"...Coolant intrusion to one of the cylinders, it’s a Ford design problem they have refused to acknowledge or help out with repairs...." Read more
Customers are mixed about the value of the sealant. Some mention that it's worth the price and saves them a load of money, while others say that it is too cheap for the value it provides.
"...It's still a huge cost savings compared to a proper head gasket replacement's cost...." Read more
"...So far so good. Good value for the price." Read more
"...If anything, this product is too cheap for the value it provides." Read more
"...Well worth the money spent to try K-seal first for minor head gasket leaks before bringing it to the repair shop or dealer." Read more
Customers have mixed opinions about the quality of the sealant. Some mention that it's the strongest sealer they've ever seen, it forms a solid, bonded repair, and is still going strong with no issues. However, others say that it is not good as advertised and does not impress them at all.
"...Not sure what to do with this car, body, paint and interior was in excellent condition, oil was always changed with Mobile 1, it was a well..." Read more
"...using a burping funnel because of air gets into the system, K seal won't work properly.April 2004 update...." Read more
"...It literally saved my vehicle from catastrophic failure and cost me less than $35 in cost for two bottles overall...." Read more
"...My only complaint about this product is that it makes your coolant look disgusting, almost looking like half coolant, half dirt...." Read more
Customers are dissatisfied with the radiator. They mention that it will not fix the crack in their marine engine block, hairline crack in the head, or clogged the heater core. They also say that the sealant plugs a tiny but visible crack but it clogs the heater and the radiator cap is slowly falling apart.
"...But make no mistake, this stuff clumps up by design and can definitely cause clogs in the wrong place...." Read more
"...Because my radiator cap was slowly falling apart, the system wasn't pressurizing properly and coolant wasn't really being drawn into the radiator...." Read more
"...The coolant / K-Seal mixture instantly clogged up and broke the pump. This was concerning to me as that was throughout my entire cooling system...." Read more
"bought 1 about 3 years ago and it held, then dec, 24 2022 got cracked block in a 97 civic vtec 1.6 liter...." Read more
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UPDATE: 9/9/16 Still no leaks, I've clocked 20K+ miles on K-Seal with no issues. Hoping for another 20K... buy this stuff.
UPDATE: 1/11/17 Well, the engine miss has returned, anti-freeze is disappearing again, head gasket is leaking again. Just poured another bottle of K-Seal in again, within 5 minutes the leak is repaired again. This stuff is great, my old beater is good for another 20K I hope. Money saved again! My mileage on the first repair was 23K miles, not bad for a $11 fix.
I bought this product on Amazon in an act of desperation. I had purchased an old first generation Hyundai Santa Fe last year that suffered numerous, expensive breakdowns. After paying thousands of dollars in various repairs, the dreaded sweet smelling white clouds of smoke started pouring out of my tailpipe in October. No leaks on the ground, but there was white smoke coming out the tailpipe and around the base of the engine, so the issue became quite severe very quickly. One important point, my vehicle has never overheated... if it had, I am not sure if this product would have worked. I do not think I warped the head, I believe the gasket just blew. This happened right after putting in a brand new radiator, which has had no leaks.
I was losing a few ounces every 20 miles or so. This was an awful predicament as a proper head gasket replacement was estimated over $4K, which was a bit more than what I had paid for multiple repairs to date. Point is, I was desperate and started looking through all the stop leak products for the one least likely to damage my vehicle. This was a roll of the dice, and I think it is important to say that the best way to ensure your vehicle lasts is to replace the failing parts properly. You never-ever want to put sealant products into your engine or transmission unless you are truly desperate due to prohibitive cost to repair properly. But here I was, owning a vehicle that wasn't worth what I had already paid into it for repairs with a massive failure looming... so I bought this. Not to speak poorly of other products, which also are reviewed on Amazon with varying levels of success, but I liked that this product did not contain "liquid glass", which is a chemical that hardens up solid in the coolant system. Mind you, if applied properly, those might be an even better product than this one in the long term, but I read many customer reviews where those products could solidify in the wrong spot like the thermostat or radiator, totalling the engine shortly after. This product seemed the least harmful due to the way it is advertised as using small particles to stop leaks. But make no mistake, this stuff clumps up by design and can definitely cause clogs in the wrong place.
So, here is my K-Seal experience, please take it with a grain of salt as I am not responsible if this approach damages your vehicle. If you read the instructions on the bottle, it says to pour all of the bottle directly into the overflow coolant tank or directly into the engine block via an open coolant hose. I was super anxious about pouring that much in as the bottle states that this treats up to 22 liters of coolant... my vehicle has a little over 7 liters in it! I give credit to an earlier reviewer who recommended using less of the product incrementally, I absolutely used that approach. The key is patience (a LOT of patience!). I took a clean 4 ounce mini-water bottle and thoroughly mixed 2 ounces of this product with 2 ounces of coolant for a couple of minutes. Product will be a glittery copper color when combined. Then I poured it into my coolant overflow tank (make sure not to overfill, this product will very likely cause coolant in overflow tank to increase) and idled the vehicle. The instructions indicated 15 minutes or so should be enough, but I ran it for an hour. I was watching the tailpipe and did not really see a decrease in smoke so was disappointed, but recognized that this product works by getting very hot, circulating towards holes/gaps, gradually "clots" where an atmosphere is present, and semi-solidifies. So I shut down the vehicle for 48 hours to allow the product to solidify. Then I checked the coolant level, which was still elevated from the prior treatment and used the SUV. To my disappointment, over the next hundred miles, the coolant level continued to drop. So roughly 10 days later, I repeated the process and gave the product time to harden. The next time I ran the vehicle I became alarmed, the engine made a low groaning sound for the first few minutes... I think the product may have gummed something up but thankfully it cleared up after five minutes. I drove the vehicle for about around 50 miles but still saw and smelled the white smoke everywhere. I let it sit a few days, drove it with little improvement for 2 weeks, then applied one more treatment. I used about 6 ounces of the product in total. Then I decided to just drive it around and see if repeated cycles over time helped... and it did. Verrrryy gradually. I still have some white smoke coming out of the tailpipe today, but much less than before and my coolant level is stable. I would call this a success, and am keeping the last 2 ounces premixed in my trunk just In case it fails down the line. To cap my long story, it has been roughly 4 months since I went through these trials with this product. I only drive short distances locally and have put 330 miles on the car since putting this stuff in, and it is performing well. No overheating (which I am constantly watching for - you should too if using this or any sealant products in case the thermostat gets sealed).
In sum, $14 saved me $4000+ on a vehicle that is not worth the additional cost. It was worth taking the chance for me as it is a high mileage old SUV. If it was a new car, I would very likely consider getting the head gasket repaired properly, but would keep this as a viable backup option if desperate and willing to chance destroying the engine if it fails. This is one of those products that is worth keeping in the trunk for emergency use.
I will provide updates here if the product suddenly fails or at the beginning every year I own the SUV so you will know the long term use case for K-Seal.
Thanks for reading and best of luck all!
Update: 12/7/2022 - Well, this miracle in a bottle has failed just over a year after I put it in, roughly 1500 miles later. I heard bubbling in the front of the SUV dashboard earlier this week, which indicates that air is getting into the heater core. No visible bubbling in the coolant overflow tank and no "chocolate milk" in the oil from coolant mixing in, which is good. I checked the tailpipe and saw the white sweet smelling smoke coming out steadily. I purged the air from the system and added the last 2 ounces of K-Seal to the coolant system, hopefully it works like it did before.
Given that I drive this SUV quite frequently for short local trips (2-6 miles at a time), this chemical did a great job sealing the leak for a prolonged period. It may not be a permanent fix in my case, but I have no issue adding more K-Seal periodically if it reseals the head gasket without damaging the engine or other cooling system parts. It's still a huge cost savings compared to a proper head gasket replacement's cost. I will provide an update once I have a chance to evaluate if the sealer works again or not.
One other thing to mention that I did last year (but forgot to note in the original review)... I was very concerned that my working order heater core could get sealed off by this stuff, so I never ran the heater as the K-Seal instructions recommended. Instead, I set the temperature controls to the coldest setting and "off" mode to reduce the likelihood of K-Seal going through the heater core when applying it for the first few heating/cooldown cycles. I am not saying this is the correct thing to do, and if you try it, it's completely at your own risk, but... I had plenty of strong heat from the heater core all winter last year. I did the same thing this time around. Just food for thought for like-minded individuals who are also very concerned about applying sealers in the heater core. I think this method helped, but I could be wrong.
In any event, I hope this update is helpful for those with similar head gasket issues.
Update: 6.9.2024 - Vehicle is still running well using the approach I outlined above roughly 2,500 miles later. I noted minimal white smoke during the past winter but no large clouds of smoke nor any bubbling in the overflow reservoir; my heater was running nice and hot too. Since the prior update, I have not used any more K-Seal. I plan to only add an ounce or two if I observe symptoms of a worsening head gasket leak but will not add more than the second bottle in total per the K-Seal manufacturer instructions. This product will likely keep my old SUV running for a couple more years at this rate, which is pretty astounding. It literally saved my vehicle from catastrophic failure and cost me less than $35 in cost for two bottles overall. Hope it works for you all too, good luck!
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