K Seal Permanent Coolant Leak Repair


K Seal Permanent Coolant Leak Repair  is a one-step permanent total system for coolant leak repair.  It will permanently repair leaks in the head, head gasket, block, radiator, heater matrix, freeze plug and water pump casing.


K-Seal is simple to use. You just Shake, Pour & Go. No need to drain or flush the system. No need to worry about what type of antifreeze or coolant is in the cooling system.  It couldn’t be easier!


Suitable for use with all water cooled engines including cars, motorbikes, commercial vehicles, heavy plant, agricultural machinery, marine engines and generators.


Originally developed and still manufactured in the US, over 2 million bottles have sold worldwide. K-Seal is a No 1 brand,  trusted by the professional mechanic and motor factor.  In fact 9 out of 10 motor factor stockists in the UK recommend K-Seal as their preferred coolant leak repair product.



  • Fixes most leaks in all types of water cooled engine including cracked heads, head gasket failures, cracked blocks, radiators, heater cores and water pumps.
  • A repair made with K-Seal is permanent, guaranteed for the lifetime of the engine.
  • Unlike inferior coolant products, K-Seal mixes with all types of antifreeze and coolant.  There’s no need to drain or flush the system before or after treatment.
  • K-Seal is easy to use.  Shake the bottle; add it to the cooling system and go.

Save money with K-Seal


With a head gasket or block repair potentially incurring a costly garage repair bill, K-Seal is the perfect solution and not just if you’re on a tight budget. You might not want to spend money on an expensive repair for an old vehicle.


For far less than you would expect K-Seal will have you back on the road in minutes.  K-Seal is the most reliable best value total coolant leak repair available today referred to by thousands of motorists as ‘the miracle in the little blue bottle’.