How does K-Seal work?

When added to an engine's cooling system K-Seal will flow harmlessly through, suspended in the coolant. However, if a leak is present, K-Seal will quickly coagulate around the damaged area and repair the crack permanently.

Does K-Seal work permanently?

Testing by Brighton University showed K-Seal is capable of permanently sealing holes of up to 0.635mm in diameter, and cracks up to 0.254mm wide by 12.7mm long. As most holes and cracks are significantly smaller than this, K-Seal can provide a permanent, guaranteed fix for the majority of leaks.

How long does it take K-Seal to work?

It'll take 5 minutes for your engine to reach operating temperature.

Can you leave K-Seal in?

Either replace the cooling system contents or leave K-Seal in the system. After K-Seal has made a repair it is not necessary to leave it in the system because the repair is permanent. You can either choose to replace the contents of the cooling system or leave the original K-Seal product in the system.

Do I put coolant after K-Seal?

When adding via the overflow/expansion tank, add K-Seal first and then top up the coolant. This helps to get K-Seal into the cooling system more quickly.

K-Seal Full Test - Purchase options, Instructions & Results

Can you pour K-Seal directly into radiator?

Do not pour K-Seal directly onto the radiator core. If you are concerned coolant flow is obstructed we recommend flushing the cooling system prior to using any K-Seal products.

What size leak can K-Seal fix?

Testing by Brighton University showed K-Seal is capable of permanently sealing holes of up to 0.635mm in diameter, and cracks up to 0.254mm wide by 12.7mm long. As most holes and cracks are significantly smaller than this, K-Seal can provide a permanent, guaranteed fix for the majority of leaks.

Will K-Seal fix a cracked head?

K-Seal Ultimate is the simple, permanent fix for blown head gaskets, cracked heads and blocks, and porous engine blocks. Our unique formula works with all water-cooled engines – there's no need to drain or flush your cooling system, and it doesn't matter what kind of antifreeze or coolant you've used previously.

Will K-Seal mess up my car?

Is K-Seal bad for your car? No. Scientifically tested, K‑Seal will not cause any harm to your car or its engine, nor will it damage the pump. It simply does what it says on the bottle: seals holes in your coolant system and cracks in your head gasket with ease, without the risk of blockages.

Where do you put K-Seal into?

Shake the bottle vigorously and add the entire contents to the radiator or header/expansion tank. If adding to the radiator do not pour directly onto the radiator core. K-Seal products are compatible with all types of antifreeze/coolant and are not affected by other additives that may already be in the cooling system.

Is K-Seal any good?

So, in conclusion, this product completely worked for me when I did not at all expect it to. It is a darn good product at an amazing price, and therefore definitely worth a shot before replacing components of your engine cooling system. I had good results, and anticipate continued performance.

How much does K-Seal cost?

New & Used (13) from $19.32 FREE Shipping on orders over $25.00 shipped by Amazon.

Will K-Seal stop a water pump leak?

K-Seal can repair most leaks in your engine's water pump casing and seals.

Does K-Seal work on engine blocks?

K-Seal and K-Seal HD will permanently repair most engine block failures including: Engine coolant leaks. Cracked engine blocks.

Will K-Seal stop overheating?

If you are losing coolant and your engine is overheating, then you can use K-Seal to quickly and safely stop the leak.

Will K-Seal stop white smoke?

K-Seal can fix water loss and white smoke from your car exhaust. Thick white smoke pouring from the exhaust is usually due to a crack in the cylinder head, engine block or head gasket.

How do you flush K-Seal?

The basic steps to flush a car engine block are:

1. Remove the lower radiator hose and catch the draining coolant in a bucket.
2. Remove the top radiator hose and flush the system out with a normal hose.
3. Continue until the water runs clear out of the bottom of the engine.
4. Refill with coolant and reattach the radiator hoses.

What's the difference between K-Seal and K-Seal HD?

However, customers might wonder why there are two sizes for them to choose between – what are the differences between K-Seal and K-Seal HD? Well, there's only one, really: size.

Will radiator stop leak harm my engine?

When you carefully follow the instructions for our engine, radiator or other stop leak products, there is no risk of damage. Always remember these points: Bar's Leaks stop leak products work for small to moderate leaks.

Is K-Seal a temporary fix?

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.

Does K-Seal leave residue?

The contents were not properly mixed and some residue remained in the bottle. It is essential that the entire contents of the bottle are added to the cooling system. If any residue remains in the bottle then add a little water, shake well and pour into the cooling system.