Does Coolant expire?

[HyeVltg3]

I built a Water-Cooling loop for my Xbox 360 back in 2012, and had 3/4 of a 1L bottle of coolant left that I never got to use (moved up to a new Xbox 360 Slim, stashed WC Xbox in the basement).
Its an EKWB premixed coolant, on the bottle its dated "08-2012", and on the label it says "2 year Shelf Life". I know it should end there but cant hurt asking, isnt this just distilled water with some type of chlorine and food colouring...can I use it now or do I need to shell out more $ for coloured magic-water ?

Also, I'm assuming that the 3 year old coolant already still in the WC Loop in the Xbox, is...bad to reuse?

Edit: it shows "Cooling" up on there but I cant select the Cooling category...huh?

 

[xghoststrike]

i do not believe coolant will expire but i do know that if it is distilled or deionized it will automatically over time no matter where it is become stilled and ionized again basically meaning it will become an electrical current again so it will then become harmful to components

 

[HyeVltg3]

Harmful, if leak, right?
this is pretty much what it says on the label, copy+paste of shop page of the exact same coolant in question.
Characteristics:

- low electrical conductivity
- extra pure distilled/deionised water of electrical conductivity of 1µS/cm used for the coolant
- includes additives against algae and corrosion
- high quality concentrated pigments lead to intense, vivid and saturated colours
- not aggressive towards acrylic, acetal, rubber or other gasket materials
- ecologically friendly (85% degradable in 30 days)
- ROHS compliant
- 2 year shelf time

 

[-HH-]

No, What XGhostStrike is saying is that often liquid can gain a staic charge over long periods of time and because the metal plates in your liquid cooling loop are conductive they can send small shocks of electricity to the cpu/gpu processing units which well isn't good.

 

[synphul]

Another potential issue could be biological growth. It says it contains a biocide in it (to protect against algae and corrosion) but those protective properties can diminish with time. Especially if the bottle was opened (partial bottle) or a cooling system that was filled and left full where either were exposed to air. Not saying it's automatically 'bad' or ruined, but considering the inexpensive cost of brand new coolant there's no real reason to risk it.