Is there a special way of sealing PET bottles? This is the first time I have used these bottles so I just screwed the cap on by hand until I thought it was tight. I have had 8 flat bottles so far and was wondering if there is a special way or tool to put the cap on.

I would like to keep using PET bottles but need help sealing them, as I don't want 8 flat bottles every brew.

Cheers, Bill

1 Answer 1


None that I know of, perhaps someone will have more insight on that.

A question: Are you re-using soda bottles? If the caps are in good condition they should work fine...

And a tip: you can still carbonate the flat beers by adding some extra sugar to it, closing and placing in a warmer place (I assume you chilled them). The yeast should still kick back into life to carbonate it. Don't need to waste them.

  • Thanks for the advice. No they are the proper brown Pet bottles and I used new caps to seal them. I will try and regas the next one I find flat as I didn't think I could regas them. Will let you know how it works out. Cheers Bill
    – user3254
    Mar 18, 2013 at 11:38

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