K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
Key features
- •Permanent coolant leak repair
- •Mixes with all antifreeze
- •No draining or flushing
- •Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
- •Just shake, pour and go
BrandK-Seal
CategoryCooling System
ColorBLUE
WarrantyWhen K-Seal makes a repair we guarantee it will be permanent
K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
List Price: $24.93$22.44DEALYou Save: $2.49 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 24, 2026In Stock (12)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.0
out of 5
Based on 10 reviews
5★
80%
4★
20%
3★
0%
2★
0%
1★
0%
Fantastic results
JimD•October 6, 2017
Exhaust when car started up was a cloud of white smoke and smelled slightly of antifreeze. Told by several people that it sounded like a leaking head gasket. My mechanic said that could run $1,500 on the low side to $4,500 on the high side. The coolant had to be topped off every couple of weeks. I used K-seal and it was a piece of cake to use. I have not lost a drop of coolant for the last 3 weeks. Thank you K-seal!!
Magic Elixir for head gasket leaks.
tepent•September 27, 2017
This stuff is magic elixir. I had a fairly bad head gasket leak that was burning coolant at a quart every two weeks or so. I also think it was causing sludge buildup in the oil due to burning coolant which would clog my oil filter and cause valve click when starting the engine. I put k-seal in the coolant and within miles it stopped leaking and burning coolant. I also have not seen a recurrence of the oil sludge issue so far. I know I will need a rebuild or new engine one day but this may get me a few more years as my truck runs without issue. Thanks K-Seal.
So far so good!
John rourke•August 11, 2017
I tried this product after much hesitation to fix a small leak at the head gasket or block.
Problem: Have an 04 Audi that runs very good, no overheating, no over pressurizing the cooling system. However when the engine was stopped and cooling down, coolant was getting into cylinder 2 causing the engine to run rough when restarted until the coolant was pushed out. So instead of taking the head off I gave this a try. Followed the directions and added half the bottle to the expansion tank. It's been two weeks now and no more rough starts!!
Problem: Have an 04 Audi that runs very good, no overheating, no over pressurizing the cooling system. However when the engine was stopped and cooling down, coolant was getting into cylinder 2 causing the engine to run rough when restarted until the coolant was pushed out. So instead of taking the head off I gave this a try. Followed the directions and added half the bottle to the expansion tank. It's been two weeks now and no more rough starts!!
If leak resumes, give it more time to reseal.
Hoken•July 10, 2017
I used K'Seal to close up a leak in the intake manifold gasket on my Chevy 3.8 L engine (thanks Dex Cool!). It stopped the leak the 1st time I drove it, and the leak didn't resume for 6 days!
O.K., a week after the leak resumed, K-Seal very nearly stopped it again, and has remained in place for 2 months now. I can still see the Cu particles in the coolant, so is either staying in place or continuously repairing its leak plug. Now 3 months since adding K-Seal - I'm still losing only a cup of coolant in 25 miles, & those are round trips, so it sits pressured up twice b4 I top it up.
O.K., a week after the leak resumed, K-Seal very nearly stopped it again, and has remained in place for 2 months now. I can still see the Cu particles in the coolant, so is either staying in place or continuously repairing its leak plug. Now 3 months since adding K-Seal - I'm still losing only a cup of coolant in 25 miles, & those are round trips, so it sits pressured up twice b4 I top it up.
Works great! I had to put coolant in my car ...
Amazon Customer•June 27, 2017
Works great! I had to put coolant in my car every other day and was told I would have to bring my car in to get it fixed. I was sure that was going to cost a fortune but then I found this product and though why not give it a try. I used it and followed the directions and it worked perfectly. I haven't had to put coolant in my car for months! Would definitely recommend!!!
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