Putting Prestone Head Gasket & Engine Block Repair to the Test

Every Prestone product is put to the test, both in the lab and on the road to make sure they excel. So before we launched Head Gasket & Engine Block Repair last year our research and development team were keen to put it through its paces.

Prestone Head Gasket & Engine Block Repair is guaranteed for any car and can be mixed with any coolant/antifreeze, to make it easy for you to choose it and add it to your car. Mixing the wrong product with your coolant can have damaging effects. For example, this test shows what happened when we mixed a competitor’s product (Competitor A) with a regular 2 year coolant. It formed a gel, which has the potential to prevent the flow of coolant around the engine, leading to overheating and costly damage.


This test was repeated below and shows Prestone Head Gasket & Engine Block Repair mixed with the coolant – the coolant stays liquid and does not form a gel. This means the coolant will continue to recirculate around the cooling system and regulate the temperature, helping to protect your engine against overheating and damage.


This ability to mix with all coolants means that Prestone guarantees a safe, permanent fix every time, with no damaging effects. Prestone Head Gasket & Engine Block Repair will also reduce corrosion and prevent future leaks, making it the best choice for you to fix leaks in your car’s:

  • Head gasket
  • Engine block
  • Cylinder head
  • Freeze plugs
  • Water pump gasket
  • Radiator
  • Heater core
  • Hoses


After testing it in the lab, we took Prestone Head Gasket & Engine Block Repair on the road to see how it performed for mechanics. You can read about it here. Read more