Gyeon Can Coat

Opened or unopened?

I`m interested in both..I have a bottle that is unopened and it`s been on my shelf about a year or more.

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I had 2 bottles of it sit around for more than 6 months before I used one of them on 3 different cars a couple weeks apart. Other than the top being a pain to open because it hardened and crystallized, I didn`t notice anything wrong with it at all. After that the 2nd bottle was opened to apply and has been sitting for the last month.

I think the top hardening keeps it completely sealed and somewhat fresh so I`d estimate a another several months after being opened at least until it begins to deteriorate, if not longer.
 
My bottle was first opened 2 years ago and I’ve run a handful of tests with it throughout this time including last week. It’s held up really well, I agree with RZ that it hardens slightly against the initial seal on the original cap and this must help keep it fresh. Remove the sprayer top after use, I actually need to find a solvent to test that will help clean this up after use so it doesn’t clog.
 
My opened bottle is a year old and the contents are still good. I used it on the door jambs a couple weeks ago and it still performs great. I have not had any issues with the sprayer. I run it trough hot water and pump it many times. I am still on the original sprayer.
 
Good to know. It sounds like it will last a very long time even after opening. I’m tired of buying small bottles of coatings that dry up quickly.
 
20 months on my non-aerosol bottle. I agree with the others. The cap seems to seal itself after each use.
 
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