Mend a Crack in Pottery

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A crack or chip in a favourite mug or mixing bowl doesn't have to spell doom for the object. Follow these easy steps to restore your pottery item and lengthen its useful life.

Steps

  1. Select the correct slow-drying adhesive for the repair:

    • Use polyvinyl acetate (PVA) or white glue for pottery
    • Use a clear epoxy glue for ironstone, porcelain, and glass.[1]
  2. Wear clean gloves while handling the pottery item.
  3. Clean the crack or chip. Wash both the crack and the area around it using a cotton bud and warm, soapy water. Use a very gentle sponge to remove dirt and other particles.
  4. Dry the pottery item before using the adhesive. Place the pottery item into the oven set at 50ºC or 122ºF. Leave it for 30 minutes. Remove and work on while still warm.
  5. Prepare the adhesive. Follow the instructions on the adhesive for any mixing or preparing required.
  6. Make the repair.

    • Crack:

      • Crack in object: Use a toothpick or fine brush to force the glue into a crack in the pottery item. Ensure that the crack has absorbed as much glue as possible.
      • Crack that has broken object in two: A brush is excellent when the crack has resulted in two pieces. In this instance, brush the glue lightly along both broken edges and press the broken pieces together gently. Hold in this position for 30 seconds to a minute before releasing.[2]
    • Chip: Fill the chipped area on the pottery piece with glue. Slide the chipped piece into place and when you are satisfied that it is sitting neatly, hold the piece in place for about 30 seconds before letting go.
  7. Remove excess glue that has oozed out of the crack or chipped area using a cotton wool ball dampened in alcohol or nail polish remover. Alternatively, use a razor blade or utility knife to scrape away any excess.[3]
  8. Allow the pottery item to cool and dry. It is best to leave it overnight to solidify before attempting to use for culinary, watering or other active purposes. Display items can simply be re-shelved.

Tips

  • Rubbing alcohol or spirits are fine for use on the cotton wool ball if desired.

Things You'll Need

  • Appropriate slow-drying adhesive - epoxy or PVA; avoid fast-setting versions as you need time to work to ensure a perfect fit
  • Toothpick or fine brush

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Sources and Citations

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