Another downside is you will have to wait up to 20 minutes with the engine idling to ensure all the cracks are properly sealed. While the price is a bonus, you may have to buy in bulk to get more efficient results. It can also be used with all types of coolant, including yellow, orange, pink, red, blue, and green silicate-based and non-silicate-based antifreeze. One other benefit is this stop leak can be added to the cooling system without having to flush out the antifreeze. It easily seals leaks in plastic, aluminum, and metal radiators, heater cores, gaskets, and freeze plugs. This solution stops overheating and reduces the temperature of the water in the radiator.Īnother great feature is how durable and effective this stop leak is. Step two is known as the Xtreme Cool formula. The compound making up the fluid works great at sealing leaks, and it also conditions the engine with the use of what Bar’s Leaks call Liquid Aluminum. Another problem is it tends to clog easily and is a bit on the pricier side.īar’s Leak is well-known for its stop leak products, and among the best is its Liquid Aluminum Stop Leak. This could be due to the size of the crack, but it should still block small holes without issue. K-Seal does guarantee a permanent seal, but many consumers report they experienced some leaking again a few weeks or months after application. While this may be an excellent radiator fluid stop leak, there are a few drawbacks you should be aware of. K-Seal’s formula is designed to target holes and cracks then permanently seal them without damaging your engine. It also can be left in the cooling system or flushed out if needed. However, use extreme caution when mixing the solution with a hot engine to avoid hurting yourself.Īnother benefit of K-Seal’s leak repair is it mixes with all types of antifreeze, so you need not worry about buying a specific brand for your car.
It’s capable of being added to either a hot or cold engine, saving your time. One of the best features is that it is simple to use and can be applied instantly to your coolant system. This K-Seal leak repair provides a tight seal to your cooling system quickly and efficiently.
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