Skip to Main Content Skip to Footer Links
Error occured! Please reload the page and try again
Choose a Store
Open till 
There are vehicles in your garage

Free shipping on orders over $35.

Enroll in Speed Perks for more savings.

Cart is empty!

Add Something to the cart

includes estimated shipping

Vehicle added


Find parts for the selected vehicle:

View Vehicles
Are you sure you want to delete this vehicle?

    Add a

    Add a

    K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak

    Loading ...
    Exact Fit May Not Fit Doesn't Fit for your

    • Product Details

      Part No. ST5501

      Warranty Details (30 DAY REPLACEMENT IF DEFECTIVE)

      Multi-Purpose One Step, Permanent Coolant Leak Repair - Advanced ceramic forumla

      Product Features:

      • Anyone can use this product - No Flushing or Draining - You can even pour into the overflow tank.
      • Mixes w/all types of antifreeze
      • Just shake, pour & go - Works in just minutes
      • Works on Head Gaskets, Radiator, Heater Cores, Freeze Plugs, Water Pump Casings, Cylinder Heads & Cracked Blocks.
      • Safest, easiest, cost-effective, trade trusted & proven product.
      • Continues to work, finding & repairing new leaks
      • Can be poured into a warm or hot engine.
      • Will not clog or damage any part of the cooling system
      • Will not clog water jets
      • Independently tested to ASTM D-3147

    • Read Review
    • Q & A