Does anyone know what the active ingredient is in Blue Devil ?

Thanks.

 

https://gobdp.com/wp-content/uploads...4_RAD_MSDS.pdf


Sodium citrate, which is a citric acid salt. A smidge of EDTA Tetrasodium, which helps clean metal corrosion out of the cooling system.

 

Many Thanks !

The Prestone says right on the bottle "Sodium Citrate"; either it does not contain nearly as much, or the EDTA Tetrasodium makes all the difference.

You seem to know about this stuff; could I have mixed the Prestone with the Blue Devil in the same flush cycle ?

Reason I ask is the local store only had a single bottle of each and my system calls for at least two bottles.

I just did one flush with the Prestone, followed my many rinses of plain water, and then a flush with the Blue Devil.

It is amazing how much more crud the Blue Devil brought out compared to the Prestone; the Prestone being first, I would have thought it would have showed more regardless.

 

^^^You'd be well advised to contact the manufacturers of those products seeking their input on compatibility in actual real-world use. IMHO anyway.............