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Issue Many Are Ignoring: Most Coolants Contain 2-EHA (which 'eats' silicone)

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Issue Many Are Ignoring: Most Coolants Contain 2-EHA (which 'eats' silicone)

Old 01-17-2015, 07:53 AM
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Sorry for reviving this thread but I'm in desperate need of new coolant and FL-22 is not available where I live.

Does anyone know if Wurth or Mobil coolant contain 2-EHA? I've searched online but can't seem to find solid info
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Old 01-17-2015, 08:36 AM
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G-05 coolant is HOAT, it does not contain 2-EHA,Can you locate Valvoline Zerex G-05. Some Wurth coolant is G-05, but not all.
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Old 01-19-2015, 01:56 PM
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Originally Posted by CRO8TIA View Post
G-05 coolant is HOAT, it does not contain 2-EHA,Can you locate Valvoline Zerex G-05. Some Wurth coolant is G-05, but not all.
Thanks for the reply. what's HOAT? I'll try to locate the Valvoline coolant. I thought there's only one Wurth coolant :/ Anything else i can look for?
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Old 01-19-2015, 04:49 PM
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hybrid organic acid technology, I think Chrysler also use this in late model vehicles, try to source some from your local Chrysler dealer.
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Old 01-20-2015, 04:46 AM
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Originally Posted by CRO8TIA View Post
hybrid organic acid technology, I think Chrysler also use this in late model vehicles, try to source some from your local Chrysler dealer.
I just located Valvoline coolant made to G-05 standards. Would that do?
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Old 01-20-2015, 04:55 AM
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Yes!
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Old 01-21-2015, 05:59 AM
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Originally Posted by Aston177 View Post
Sorry for reviving this thread but I'm in desperate need of new coolant and FL-22 is not available where I live.

Does anyone know if Wurth or Mobil coolant contain 2-EHA? I've searched online but can't seem to find solid info
Just use Zerex Asian Coolant after a good flush.

It has all the attributes Mazda's OEM coolant does & you can spot it on sale AT FULL STRENGTH (as in, not pre-mixed) for as little as $12 a gallon.

I've come around on All Makes/All Models coolant such as Prestone, by the way, as I no longer believe it has an adverse effect on the gaskets and hoses used in the 8s coolant system.

In fact, many Ford, Chrysler, GM, and yes, Asian vehicles are using very similar coolants in their factory fills, even going with OAT & HOAT coolants containing sebacic acid and/or 2-EHA.

These coolants are doing an amazing job at long-term corrosion resistance, keeping the motor cool, keeping the radiator pristine, and not suffering silicate fallout and scaling posed by the older silicate based coolants.

A trusted mechanic friend has fold me his shop that does a lot of Japanese vehicle service sees vehicles that have used the all makes/all models coolants have brand new like radiators even after 5 or 6 years between flush & fills, as long as they are model year 2002 or newer, and they've suffered no ill effects from the organic acid additives, whether sebacic acid or 2-EHA.
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Old 01-21-2015, 09:18 AM
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That's all fine and good, but the last time I checked, radiator's aren't made from silicone, the OP's query was a coolant that does not contain 2-EHA which eats silicone.G-05 provides excellent anti corrosive quality's as well as not affecting silicone hoses.
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Old 07-12-2016, 04:27 PM
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RAVENOL HJC - Protect FL22 Concentrate is a good option, especially if you are in Europe
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Old 10-16-2018, 08:21 PM
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This ok ?
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Old 10-16-2018, 09:46 PM
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Probably not, going with what is said in this thread.

Is FL-22 really hard to find in your area?
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Old 10-16-2018, 09:57 PM
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Originally Posted by UnknownJinX View Post
Probably not, going with what is said in this thread.

Is FL-22 really hard to find in your area?
Just got a trade discount price from Mazda $159 for 5L
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Old 10-16-2018, 10:02 PM
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This one ?
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Old 10-17-2018, 12:36 AM
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I bought a big jug(forgot if it's a gallon or 5 L) of FL-22 and that was only like $30ish for me. Where do you live?

Is this Dex-cool? I would double check because some older Dex-cool has 2-EHA.

A slightly wild move: see if you can source some Honda OEM coolant for cheap. Honda OEM coolant is guaranteed to be 100% 2-EHA free.

Last edited by UnknownJinX; 10-17-2018 at 12:41 AM.
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Old 10-17-2018, 12:51 AM
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Originally Posted by UnknownJinX View Post
I bought a big jug(forgot if it's a gallon or 5 L) of FL-22 and that was only like $30ish for me. Where do you live?

Is this Dex-cool? I would double check because some older Dex-cool has 2-EHA.

A slightly wild move: see if you can source some Honda OEM coolant for cheap. Honda OEM coolant is guaranteed to be 100% 2-EHA free.
Australia mate. It's the latest ACDELCO Dexcool. I work at a GMH Dealership
First pic is Red coolant and second pic green
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Old 10-17-2018, 03:50 AM
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Honda Coolant $50
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Old 11-07-2018, 12:06 AM
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So has anyone confirmed we have silicone gaskets/seals ?
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Old 11-07-2018, 04:00 PM
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Anyone ? So Dex-cool would be safe if there are no silicone correct ? From factory

Last edited by Sydo; 11-07-2018 at 04:03 PM.
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Old 11-07-2018, 08:29 PM
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Talking to myself here. Since no-one has confirmed there are any silicone gaskets or seals in our cooling system this thread is crap and the 2-EHA theory is irrelevant
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Old 11-07-2018, 08:33 PM
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Who would win?

Some cheap coolant with 2-EHA

One b r a p p y b o i

I don't know what the seals are made of(silicone would be likely), but I do know an engine rebuild/replacement is very expensive.

On a piston engine, you just have to redo the head gasket, but even then the trouble would have been greater than the amount of money you saved on the coolant.

Why risk it?

Last edited by UnknownJinX; 11-07-2018 at 08:40 PM.
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Old 11-07-2018, 08:39 PM
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AC Delco DEXCOOL isn’t that cheap. I’m surprised no-one here can confirm the silicone
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Old 11-09-2018, 01:21 PM
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It's cheap insurance to use the coolant Mazda have certified work with their engines.
Seriously, it's not like you use coolant on a total loss basis. If it costs you US$100 every couple of years, the burden isn't that great.
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Old 11-09-2018, 04:21 PM
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The thread starter is presuming we have silicone hence why he started this thread. There has been no evidence yet. Does anyone run the engine oil Mazda recommends ?

Last edited by Sydo; 11-09-2018 at 04:33 PM.
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Old 11-09-2018, 05:53 PM
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Originally Posted by Sydo View Post
The thread starter is presuming we have silicone hence why he started this thread. There has been no evidence yet. Does anyone run the engine oil Mazda recommends ?
Suppose that everyone is wrong and it's not silicone. What do you expect to gain by taking that risk?

Evidence requires a lab. Mazda has one. We don't.
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Old 11-09-2018, 09:27 PM
  #125  
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Originally Posted by Sydo View Post

This one ?

That one should be fine, although I have not read the MSDS.

Do you not have Zerex Asian Blue down under? That stuff is ~$14 per gallon here and meets Mazda's specs. (Although I'm not convinced it is chemically different than the pink version other than the dye, and the pink version is even less expensive.) I have not used the blue version in my RX-8 yet, but I have used the pink version in several family Toyotas, and it has performed as well as OE.
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