Are You Protected?


Your car needs coolant/antifreeze to keep the engine at the correct temperature. Without it, your engine could overheat or freeze, causing expensive damage.

Many of us just leave coolant/antifreeze checks to the garage, but it is easy to test and top up yourself at home, and it can save you time and money.

The Prestone Coolant/Antifreeze tester is quick and easy to use and is guaranteed for use with all vehicles, so you can check whether your car is protected any time. It tests your winter protection down to -37ºC, and your summer protection up to 129ºC to ensure you’re prepared for extremes.


  • Guaranteed to work with any vehicle
  • Tests winter protection down to -37ºC, and summer protection up to 129ºC.
  • Easy to use at home.

If you find that your engine isn’t fully protected, you can top up easily with Prestone Ready to Use Coolant/Antifreeze, which is guaranteed to mix with any colour coolant and can be used in any car.

Available in Tesco stores nationwide.


What people say…


“The antifreeze tester is a very useful addition to any toolbox, I use mine on an almost daily basis for my work in a busy main dealer.”

Mike Rogers


“Great little tool to have, very well made. Easy to use and read. Lets you see the level of protection for freezing conditions as well as the boiling point for hot summers.”

Marcus Stirling


“Really simple to use and read. It made checking my winter protection an absolute piece of cake and put my mind at ease that I was properly protected. I also used it on my father’s car and found that he required a coolant change, so this brilliant freebie has potentially saved my elderly father transport issues during the winter.

Thank you Prestone.”

Tom Rafal

Frequently asked questions:


You pour coolant straight into the cooling system, through the white tank.

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Yes. Prestone is guaranteed to be compatible with all makes and models of cars, and all other coolants. It's the only coolant/antifreeze which can be mixed with any other coolant without causing any damage. This makes it easier for you to choose and use - just pick Prestone and you know you have a high performance coolant which will work in your car.

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You should check your level of coolant regularly and top up as necessary. Check your vehicle's handbook for more information on this. If you find you have to top up the coolant every day or every week, you might have a leak and should have it checked by a trained professional mechanic just to be on the safe side.

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Prestone Ready to Use Coolant is the most convenient way to top up your cooling system. Prestone's unique formula mixes with any coolant or antifreeze and can be used in any make or model of passenger vehicle. Make sure that whichever Prestone product you choose, you follow the instructions on pack.

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