Permanent Radiator & Block Coolant Leak Repair

Simply Shake, Pour & Done

  • Blown Head Gaskets
  • Engine Blocks
  • Heater Core
  • Leaking Radiators
  • Freeze Plugs
  • Water Pump Casings
  • Cylinder Heads
STOP & SEAL
Dollar Sign

Save Money

STOP & SEAL offers a fantastic low cost alternative to help keep your vehicle on the road. Coolant leaks don’t have to result in costly repair bills – simply add STOP & SEAL to your coolant system for a quick and permanent fix.

Tools

Easy to Use

Just Shake, Pour & Done! No draining, flushing or pulling the thermostat. Contains no sodium silicate and can be used in a hold or cold engine. Repairs are usually complete within just a few minutes of adding STOP & SEAL.

Car

Permanent Repair

Not just an emergency repair, STOP & SEAL will keep your vehicle on the road where you need it. STOP & SEAL's unique formula will seek out small holes and cracks, and permanently seal them, with no adverse effect on the efficiency of your engine or cooling system. Fixes leaks in all cars/trucks up to 6 cylinders.

How Does STOP & SEAL Work?

The secret behind STOP & SEAL's ability to repair a coolant leak is down to its contents: a specially developed blend of chemical ingredients including ceramic and copper particles. When added to the cooling system the ingredients disperse and flow freely around the system suspended in the coolant. If coolant is leaking from the system, either externally (look for a puddle under the engine) or internally across the head of the cylinders, then STOP & SEAL will follow it through the hole or crack and try to fix the leak.

Using the proven formula that conforms to ASTM D-3147, STOP & SEAL can deal with a variety of leaks, as long as they are identified as early as possible. It is easy to use – simply shake it and pour it into the coolant mixture, and it will work automatically. STOP & SEAL mixes safely with all types of antifreeze/coolant.

The formula is safe for use on all water cooled engines, including aluminium (heads) and hard plastic (radiator casings). 1 bottle will seal leaks in bike/car/truck engines up to 6 cylinders. For larger engines simply use 2 bottles.