Our Products

  • Block Seal Head Gasket Repair (21100)

    What it's for:
    • Block & Head Gasket
    What it does:
    • Repairs
    • Stops Leaks
    Part Number: 21100
    • Seals Cracked Heads
    • Repairs Blown Head Gaskets
    • Stops Block Leaks
  • Head Gasket Fix (21110)

    What it's for:
    • Block & Head Gasket
    What it does:
    • Repairs
    • Stops Leaks
    Part Number: 21110
    • One Step, Easy to Use
    • Safely Seals Gasket Leaks
    • Antifreeze Compatible Sodium Silicate Formula
  • Liquid Copper Block & Radiator Sealer (21108)

    What it's for:
    • Block & Head Gasket
    What it does:
    • Repairs
    • Stops Leaks
    Part Number: 21108
    • One Step, No Draining Required
    • Antifreeze Compatible Sodium Silicate Formula
    • Permanent Cooling System Repair

A block or head gasket leak is usually a big worry for car owners. The common wisdom says that a cracked or leaking head gasket automatically means a costly engine tear-down and head gasket replacement. While this may be the case with severe head damage, in many cases you can stop a head gasket leak permanently with an application of Rislone.

We have affordable products specially formulated to seal head gasket leaks that are allowing coolant to seep into your cylinders. A coolant leak at the head, when left unrepaired, can cause major headaches:

  • Low coolant levels can cause your engine to overheat
  • Coolant in your engine removes oil and reduces lubrication
  • Burnt coolant creates excessive pollution and increases noxious emissions
  • A cracked head gasket can allow your head to warp and crack



Suffice it to say a head gasket leak needs attention right away. There are a few telltale signs that you need to watch for. Acting as soon as you detect a coolant leak in any area of your vehicle (head gasket, radiator, cooling lines, etc.) can mean the difference between a low-cost bottle of Rislone and a complete engine rebuild or replacement!

What to Watch For

While head gasket failure isn't common on new vehicles, late-model cars become susceptible as they pass 150,000 kilometers or more. Watch for these common signs that your coolant is leaking or that you have a head gasket leak between the cylinder head and the engine block:

  • Your coolant level drops constantly
  • You find coolant on the ground in a puddle
  • Your oil is cloudy or milky
  • You smell a sweet, acrid smell
  • Your vehicle overheats
  • You see excessive white smoke out of your exhaust



In most cases, any or all of these signs are indications that your head gasket has cracked or you have a coolant leak somewhere. Pinpointing exactly where the leak or head gasket breakage has occurred is difficult, but with Rislone that doesn't matter. You don't need any skills or experience to become a mechanic with our help.

Simply choose the block head gasket product that matches your symptoms and seal those leaks for good! Our advanced formulations have been engineered to seal small to moderate gasket and radiator leaks right away and keep them sealed. In most cases a single application of Rislone Head Gasket Fix or Liquid Copper Block Seal Intake & Radiator Stop Leak is all it will take. For more severe leaks, subsequent applications can help ensure your head gasket repair is permanent.

Our Team Can Help Keep Your Car on the Road

For nearly 100 years, Rislone has been a leader in fast and affordable head gasket leak sealing and we're proud to be a proven choice for our Mexican customers. Use our distributor page to find a distributor that carries our lineup of block and head gasket products. You can also contact our team using our online form if you need help choosing the right product.

Don't fret if your vehicle is showing signs of troublesome head gasket and coolant leaks - we know it's stressful, but we've helped millions of customers worldwide. We can do the same for you.