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16 oz Engine Coolant Additive

No need to drain or flush...Simply shake, pour and go!

Stops leaks in minutes and avoids expensive repairs. Suitable for all water-based cooling systems including cars, commercial and agricultural vehicles.


  • Mixes with all types of anti-freeze & coolant
  • Continues to work within the coolant system and find and repair any new or additional leaks as well
  • Repairs are permanent - you may drain all fluids and the repairs remain repaired
  • Positively will not clog or damage any other part of the cooling system
  • One bottle is good to repair minimally an 18-quart cooling system, typically a 10 cylinder engine
  • One bottle has repaired many 20 quart systems, typically a 12 cylinder engine

Permanently repairs leaks in the following:

  • Radiators
  • Cylinder Heads
  • Head Gaskets
  • Engine Blocks
  • Heater Cores
  • Freezer Plugs
Weight1
Size16 oz
BrandK-Seal
Part NumberST5516
Line CodeCEM
UPC812646010066
TerminologyEngine Coolant Additive
Size16 oz
Weight1
For warranty information please contact Auto-Wares.