Crafty Caps

Custom Beer Bottle Caps
Since 2007

Sterilizing Your Caps - PLEASE READ!!

Please read the following suggestions about sterilizing caps you have purchased from Crafty Caps.

PLEASE NOTE: Crafty Caps specializes in custom made caps, since we do not directly print, sterilizing CAN be difficult. Please make sure to read all options before sterilizing your caps. OR contact us with questions before placing your order! We can not be held responsible for caps destroyed by sterilization, so read carefully! Thank you. 


  1. **DO NOT** boil your caps.  These caps are sealed with a type of finish that will degrade if boiled.  Boiling metal caps can harm the seal, resulting in a faulty cap.   Crafty Caps is not responsible for caps that have been destroyed due to boiling.

  2. **RECOMMENDED** If you are uncomfortable not sanitizing your caps, another option would be to lay the caps out upside down and spray them with a sanitizing solution.  Shake the excess off before capping your bottle.

  3. Another RECOMMENDED option: Germ Eliminator Lamp: A unique tool to help sanitize wort, hydrometers, spoons, and other items used in brewing. 

  4. If you wish to use a sterilizing liquid (we strongly suggest not to soak the caps as the design is water resistant, but not waterproof especially with chemicals), you should first try Iodophor, Iodine or I-O-Safe.  Caps should be sterilized in a preferred solution for 1 minute, too much longer and you run the risk of destroying the design.  If your solution calls for more than 1 minutes, please test a cap for the desired time to make sure your sealant is holding up against the solution. (If you can't find these products at your local distributor, feel free to contact us and ask for more information on purchasing from us.)

  5. The oxygen-absorbing caps absorb the oxygen left in the headspace of the bottle, reducing the chance of oxidation.  Oxy-caps are activated when wetted, this will render the caps useless in terms of absorbing oxygen for any batch after the current batch being bottled.  The industry standard on these appears to be 'do not sterilize'

  6. It is suggested not to use Hydrogen Peroxide based sterilizers, such as One-Step or B-Bright.  These types of solutions can leave a white residue on the caps, but worse yet, they might degrade the sealant and ruin your design.  If this is what you use for other sterilizing, feel free to TEST a cap, however too long in any solution may start to wear off the sealant

  7. For more information on sterilizing solutions, please visit:
    A Complete Guide to Cleaning and Sanitation.

  8. Research about the sterilizing process has shown that many microbreweries do NOT sterilize their caps before capping their bottles.

    *Quote from micro employee 'We do not sanitize our caps.  We dump the caps straight into the hopper from the box.  Just rinsing the caps in clean water would be more than most microbreweries.  No bother boiling your caps either, the chance of infection from a new cap is ridiculously low.  Infections tend to come from sediment due to poor cleaning of previous batches.'

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