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Advice on types of seals for growlers

We are opening a brewpub in Saskatchewan, Canada. Our provincial authority requires that we use a seal to show that the growler has not been opened by the purchaser on the way home. That implies one of i) using a shrink wrap seal over a screw cap, ii) using a screw cap that breaks a link when first unscrewed, as with PET bottles, iii) or perhaps the use of cable tie that holds a piece of paper or plastic with a the beer name and abv. Any advice?


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4 answers

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Kinnek Knowledge Team

I believe that choice (ii) would probably be your best option.  Choice (i), putting a shrink wrap sleeve over the screw cap, is a perfectly reasonable alternative, but would run you a few thousand dollars to purchase a machine capable of shrink wrapping a sleeve onto the growler.  If you are not interested in making that extra investment, simply using screw caps that break their link when unscrewed is the cheaper (and less labor intensive) choice.

Apr 26, 2014

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Jeffrey Schwartz from Coaster Factory

Make Sure You Get Some Branded Coasters, too!!

Oct 12, 2017

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Bev Robertson from Bushwakker Brewing Company

We have settled on Parafilm as a material for sealing growlers. It is available from several suppliers. It was intended for use in medical research but fulfills our needs. It can be stretched during application and moulds itself to the shape of the cap and upper growler so that it must be torn to be removed, and it sticks to itself better than to glass or SS.so no residue remains on the growler. 

Jun 23, 2014

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Ryan Crosby from Brew Pack Products

We sell a couple hundred thousand shrink bands every year. You can buy a heat gun for $50-$75 at a hardware store, but a hairdryer will do in a pinch. You'll usually be filling and selling growlers one at a time, and it only takes a few seconds to use the shrink. 
You could also take a look at how Rouge Brewing seals theirs. It's even simpler, but may not qualify as "tamper evident" in your area. 

Jun 23, 2014

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