One gallon jug, tapered cork won't stay

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I'm using North Mountain 0ne gallon kits, and the silicon cork will not stay put. I made a crude fix by tying them down with string, which will be a pain to reapply. I must be missing something. Have others had the same issue? I'm usually pretty good at fixing about anything but these corks have me buffaloed.
 

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I have 1 gallon jugs from 3 manufacturers. The ones I got from North Mountain slip 99% of the time, others are rock solid. Getting everything absolutely dry might help. I quit fighting and use duct tape to hold the stoppers in place.
 
I have the same problem with some of my silicone stoppers on 1 gallon or 5 gallon carboys. I either tape them down or zip tie them down from the neck. The rubber stoppers work best, and I will only buy/use those if at all possible.

I've re-washed them, sanitized them, and dried them and the neck with clean wipes and often times they still 'pop-up'.
 
I'm using North Mountain 0ne gallon kits, and the silicon cork will not stay put. I made a crude fix by tying them down with string, which will be a pain to reapply. I must be missing something. Have others had the same issue? I'm usually pretty good at fixing about anything but these corks have me buffaloed.
What is the size of your stopper? I used a 6.5 on one gallon jugs and do not have any issues. Another thing I have done successfully is to "rough up" the surface of the stopper with sand paper, taking some of the glaze off the silicone.

https://labelpeelers.com/search.php?search_query=6.5 stopper&section=product
 
I’ve had that too. Slight variations in stopper sizes/not remembering which size fits best with each carboy. I use medium weight jewelers wire and wrap it around the neck of the carboy where the lip is and up over the bung - sort of like a champagne cork. Works like a charm. I just keep a couple lengths cut and ready on transfer days.
 
Agree with the comments above. drying both he outside of the rubber bung and the inside of the carboy neck helps; i have used rubber bands to help keep it stable in the first place.

Alternatively you can get these carboy hoods that slip over the outside of the top:
https://www.morebeer.com/products/carboy-blow-hood-threaded-neck-carboys.html

plug the s type airlock in one of the tubes. these have usually always fit the 3, 5, and 6 gallon carboys i have had on hand.

Hope this helps,

-Mike
 
Mine never stay put, whether I put them in dry or not. I use coated wire and make a cage. Criss-cross around the airlock, continuing down the neck of the carboy on the side opposite of the handle, then pass the ends through the handle. I bring it back up and around the airlock, then back down through the handle, and twist the ends together. Quick and holds it tight.
 
I too have experimented with various means of tying down the stoppers. Getting the stoppers and the inside of the carboy neck completely dry helps, but not always.

In the past I have ordered two batches of stoppers for my 1-gal carboys, both the same brand and type. But when I tried them out, some of them stayed in and others did not. The ones that stayed in were a little softer and more flexible, which is why I think that they stayed in. The others were too hard.

I put that down to poor quality control.
 
Mine never stay put, whether I put them in dry or not. I use coated wire and make a cage. Criss-cross around the airlock, continuing down the neck of the carboy on the side opposite of the handle, then pass the ends through the handle. I bring it back up and around the airlock, then back down through the handle, and twist the ends together. Quick and holds it tight.
What number stopper are you using? I find I have no issue with #6.5's.

Edit: Disregard the reference to the Universal Stopper. It probably wont solve your problem.
 
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