Does alde/truma glycol have an expiration date if the bottle has not been opened. I have an extra gallon in reserve and it’s about 2+years old
I just bought a gallon, so a good question. From Google, it's good for at least two years, left sealed up. If you want a better answer, I'd contact Truma/Alde. They usually respond to emails. The bottle has nothing on it pertaining to expiration.
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