Your cart is empty.
Your cart is empty.Introducing the K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair, a revolutionary solution for head gasket leaks. This 16 fl. oz. bottle of head gasket stop leak is your ultimate solution to costly and time-consuming head gasket repairs. With K-Seal, you have the best head gasket sealer at your disposal, designed to provide a permanent fix for blown head gaskets, cracked heads, and blocks. No need for a professional mechanic – this is a universal fit product that anyone can use. The K-Seal ST3501 is not just a head gasket leak sealer; it doubles as a block sealer for engines, effectively sealing any coolant leaks. It guarantees a lifetime of reliable performance. What sets K-Seal apart is the simplicity of its application. Just Pour & Go – there's absolutely no need for expensive head gasket repairs. As a head gasket fix, it's designed for ease of use. No need for a head gasket test kit or a head gasket repair kit. This product is a coolant leak sealer and head gasket repair in one, eliminating the need for a separate head gasket test. K-Seal is scientifically tested, and the only product to have been successfully tried by Brighton University, meeting the demands of ASTM D3147. If you're dealing with a head leak, antifreeze coolant stop leak, or need a head gasket additive, choose K-Seal. It's the safe and easy way to fix a coolant leak, and is ideal for use as a head seal, head gasket seal, and head gasket spray. Trust K-Seal for your head gasket repair needs and experience the ultimate in head gasket solutions.
McCartneys
Reviewed in the United States on February 19, 2025
I had a pretty bad head gasket leak. I used the bottle and it sealed it probably about 75% better than prior. I got ahold of customer service and filled out the lifetime guarantee paper and emailed it to them. I explained that it was alot better but not all the way fixed. I asked if they could send me a replacement bottle to see if a little more would do the trick. 3 days later at no cost to me another bottled arrived. I put the second bottle in and within a hour no leak. A+ company that stands behind their guarantee of a wonderful product.
RidgeTopFarmWV
Reviewed in the United States on February 13, 2025
Did not work for me after trying 2 bottles at 2 different times first bottle sealed everything up almost immediately and lasted maybe 3 days at the most added 2nd bottle sealed everything up truck sat overnight the next morning drove the truck about 30 miles and it worked fine. I let the truck sit for about 3 hours started up and the head gasket started leaking again . It won't seal every head gasket leak and if it does seal a heat gasket leak you don't know how long it will last .
Karma
Reviewed in the United States on January 28, 2025
I have used on my 2012 BMW X1. It works great, haven’t got any issues since. Hope that it last long for few years. Highly recommended
Sporto
Reviewed in the United States on January 25, 2025
Jeep Wrangler 4.0 Inline 6. Had an issue with a piston and suffered a catastrophic failure. Disassembled engine, and replaced piston, then reassembled with a fresh head gasket. Did not plane block or head, just put it back together. Engine ran fine, but I noticed lack of coolant system pressurizing, and I was refilling the radiator daily. I found a pressure leak near number 1 cylinder, which was causing significant coolant loss when engine was operating. My head was either damaged or I nicked the gasket when putting it back together by myself. Which is possible, that head is heavy and awkward. Anyway, after a lot of reviews and research, I selected K-seal. I followed instructions and added it directly to radiator. It has small copper looking flakes in it, and at first I thought it was a waste of time, because after pouring it in, and going for a drive I saw the same small flakes on the inner fender where the steam from the leak was coming from. Then after a few more days, I noticed that my cooling system was fully pressurized when hot, and the coolant was not disappearing every day. It has been about three weeks and several hundred miles, and it is solid as a rock. No coolant leak, smell or refill needed. Very impressed, this really worked.
Lloyd B.
Reviewed in the United States on July 4, 2024
Had bad coolant blowing out the exhaust on my 1989 Chevy 5.7 K1500 111k miles. Not just steam but coolant as well. Used K Seal and it did not work. So pulled heads sent to machine shop that checked them and said no faults found. Heads milled, inspected cylinders, nothing found. In fact old cylinder head gaskets and intake gaskets were okay. Re-assembly did not touch the exhaust. Just as bad. I again used K Seal. Forget the 3-5 minute idle, did not work. So allowed it to cold soak overnight. Next day ran it on the road with it blowing steam all the way. Let it cold soak overnight. Next day leak was gone. Went for drive and no smoke. Mind you this was just day one, but given the severity of the leak, this looks promising. Still not sure why it worked on the second can and not the first. I lost a lot of coolant when I pulled the heads, but it is possible enough residue of the first can of K Seal remained.My current thinking is that the problem may be a crack in the intake manifold and not the block. This is because the engine did not blow coolant before I changed the intake manifold gaskets a few weeks prior just as routine maintenance. The manifold EGR passage was totally clogged with carbon which I removed. It is possible this carbon may have sealed the crack in the manifold. Chevy manifolds have massive exhaust and coolant passages that run parallel to each other and a defective EGR system could generate excessive heat that cracks the manifold internally. This would allow coolant to get into the exhaust.
Customer
Reviewed in Mexico on July 18, 2024
El coche tenia una fuga pequeña en la junta de la cabeza, y se calentaba muy rapido, lleva casi 3 meses y ha funcionado muy bien.
Customer
Reviewed in the United States on May 4, 2024
I overheated my diesel tractor on accident one day as a stick caught the radiator fan and ripped all the blades off. This caused the headgasket to either have minor cracks or to warp the head a bit. This would have been an expensive fix so I decided to give this product a try.Before using this, it would eat about maybe a 1/4 of an inch of coolant a hour. After adding about 1/2 the bottle over multiple days, it leaks no more! I would say it preformed well. It’s been in it for about 100 hours under heavy load (full rpm grinding brush) over the last few months and has not broken loose.I am not sure how the radiator looks, but I assume it’s not clogging anything up as the engine temps are stable, and actually cooler than when it was new! I say that alone shows this product has some good performance!Overall, good value for the money and was able to be quickly used.
Badger
Reviewed in Canada on December 27, 2024
Added some time to my daughter's motor. Leaky head gasket. Worked right away
Zai***
Reviewed in Saudi Arabia on November 27, 2024
I used to drive to office and home. Due to overheating half way back home, I decided to try this after changing hoses, coolants etc. without success. First day after putting it, take 2/3 of way before overheating. Second day overheat as soon as reach home. 3rd day no mors overheating till today. Already few months after buying it. Recommended!
Gary J
Reviewed in the United States on November 20, 2024
It finally worked, but it took four bottles. You need to find the bad cylinder, then pull that plug wire. I let it run for an hour with the plug wire off.As of Dec 3 2024 It's leaking again. Guess it wasn't permanent.
Kevin Dirks
Reviewed in the United States on November 20, 2024
The product didn’t work for me, but they obviously stood behind their product and give me my money back great companies
Jamaica
Reviewed in Brazil on November 16, 2024
O produto até agora atendeu o prometido recomendo a quem nessecitar
Gopi
Reviewed in India on September 20, 2023
This product didn't work as mentioned in the item description and also did not fix the problem which it was supposed to do. It was total waste of time and money for me.
Recommended Products
$119.99
$ 46 .99 $46.99