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K&W Stop Auto Leak Solutions
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  • Instant Cooling System Stop Leak

Instant Cooling System Stop Leak

  • Permanently fixes radiators, head gaskets, engine blocks, heater cores, water pump housing, and freeze plugs.
  • Using nanotechnology, this product fills in cracks & crevices other products can’t, making a stronger, more solid bond than competitors’ products.
  • Won’t clog cooling systems. Compatible with all types of antifreeze and coolant.


DIY Skill Level: Easy


Pour & Go


Permanent Repair


10 Minute Repair

Est Cost
$13-$16


Double Money Back Guarantee

No. 401214x6 | Item # 1008134 | 15 FL. OZ. Buy Now

Buy Online: Instant Cooling System Stop Leak -


Product available at select retailers.

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      Read entire label before using product. For cooling systems up to 20 quarts capacity (cars, passenger trucks, vans).

      1. With engine off and cooled, remove radiator cap.
      2. Shake bottle vigorously for 30 seconds.
      3. Very slowly pour the correct amount into car or light truck radiator. DO NOT pour directly onto radiator core/fins.
      4. Replace radiator cap and run engine up to operating temperature until leak stops.
      Instant Cooling System PDS
      Instant Cooling System SDS

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