How to Remove Mold Release Residue

Written by ashley kurz
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How to Remove Mold Release Residue
Remove your mould release agent with common cleaners. (Cleaning materials image by TekinT from Fotolia.com)

Mold release agents such as silicone-based mould release and mould release waxes are used in many types of projects with moulds, from candle-making and crafts to car and boat parts. The mould release agents act as a barrier to prevent the material that is being formed in the mould from sticking to the mould. The release spray needs to be removed between applications to remain effective and keep your moulds clean.

Skill level:
Easy

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Things you need

  • Trisodium phosphate
  • Bucket
  • Large wooden spoon
  • Rubber gloves
  • Sponge
  • Fine-grit sandpaper
  • Paper towels
  • Dish soap
  • Rubbing alcohol

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Instructions

  1. 1

    Pour 0.454kg. of trisodium phosphate, found at hardware or home improvement stores, into a bucket.

  2. 2

    Pour 1 gallon of hot water into the bucket over the trisodium phosphate. Mix it with a wooden spoon until the trisodium phosphate is completely dissolved.

  3. 3

    Wear rubber gloves to keep your hands dry and protected.

  4. 4

    Dip a sponge into the bucket and scrub over the inside of the mould to remove the mould release wax. Scrub vigorously until the wax is removed.

  5. 5

    Allow the mould to air-dry.

  6. 6

    Use fine-grit sandpaper to remove any remaining traces of residue.

  1. 1

    Wipe a paper towel over the surface to soak up and remove any greasy residue on the surface. This will make it easier to remove the remaining mould release.

  2. 2

    Dip a sponge in warm soapy water and wash the inside of the mould like a dish. Use a dish soap with a high alkaline content.

  3. 3

    Allow the mould to air-dry.

  4. 4

    Dip a paper towel into some rubbing alcohol and wipe it over the surface to remove any slickness on the surface caused by leftover traces of mould release sprays and oils.

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