Find Your Fix!

Use our interactive Fix My Leak tool to identify the type of leak you have and learn about which K&W Stop Leak product to use to address the issue! Whether it’s a radiator leak, automatic transmission leak, power steering leak, engine coolant leak, or an oil leak, K&W can help you diagnose and fix the problem quickly and affordably.
Launch Fix My Leak

Black/brown fluid is likely an engine oil leak. You can use:

Super Turbo™ Engine Oil Stop Leak

Est Cost
$8-$11


DIY Skill Level: Easy



10 Minute Repair

You likely have a leak from your Automatic Transmission, you can use Trans-X or Trans-X 75 for higher mileage engines:

Trans-X® Automatic Transmission Stop Leak & Tune Up

Est Cost
$7-$10


DIY Skill Level: Easy



10 Minute Repair

Trans-X® 75K High Mileage Transmission Treatment

Est Cost
$12-$15


DIY Skill Level: Easy



10 Minute Repair

If the leak is coming from a coolant hose, you’ll need to replace it. If the leak is from the radiator, you can use:

Instant Cooling System Stop Leak

Est Cost
$13-$16


DIY Skill Level: Easy



10 Minute Repair

If the leak is coming from your steering rack, you can use:

Steer-X® Power Steering Stop Leak

Est Cost
$10-$13


DIY Skill Level: Easy



10 Minute Repair

You likely have an engine coolant leak. It could be from the head gaskets, engine block, cylinder heads, heater core, radiator or coolant hose. If it’s a coolant hose, you’ll need to replace it. The other leaks listed may be fixed with one of these K&W Stop Leak Solutions:

FiberLock® Head Gasket & Block Repair

Est Cost
$30-$40


DIY Skill Level: Easy



30 Minute Repair

Permanent Head Gasket & Block Repair with Nanotechnology

Est Cost
$20-$26


DIY Skill Level: Medium



2 HOURS
+ Sit for 12hrs

Block Seal Permanent Metallic™ Block & Radiator Seal

Est Cost
$9-$12


DIY Skill Level: Medium



2 HOURS
+ Sit for 24hrs

You likely have an engine coolant leak. It could be from the head gaskets, engine block, cylinder heads, heater core, radiator or coolant hose. If it’s a coolant hose, you’ll need to replace it. The other leaks listed may be fixed with one of these K&W Stop Leak Solutions:

Permanent Head Gasket & Block Repair with Nanotechnology

Est Cost
$20-$26


DIY Skill Level: Medium



2 HOURS
+ Sit for 12hrs

Block Seal Permanent Metallic™ Block & Radiator Seal

Est Cost
$9-$12


DIY Skill Level: Medium



2 HOURS
+ Sit for 24hrs

Stop Leak Solutions

K&W offers a complete line of Stop Leak products to help get your vehicles back on the road fast. Leaks, smoke, noises, and smells are issues every vehicle owner deals with. Identifying the issue and fixing it yourself can save valuable time and money. Whether you see a leak under your car, hear a ticking or whining noise from the engine, or see smoke when starting your vehicle, K&W has a solution for your specific need.
K&W Stop Leak products could save you from a costly repair or replacement, and they’re simple to use so you can Do It Yourself.
Compare K&W Stop Leak Solutions

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KW pour and go solutions can permanently fix leaking head gaskets.

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