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How to Make Air Dry Clay More Water-Resistant
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Quick answer: Air dry clay is not waterproof. Water can soften it again. Sealing every side with a few thin coats of varnish makes it more water-resistant, enough to handle humidity and the odd splash, but not soaking or holding water.
Why water is a problem
Air dry clay hardens as water leaves it. Bring water back and the surface can soften, crack or lose its paint.
How to protect it
- Make sure the piece is completely dry.
- Paint it, if you are painting, and let the paint dry.
- Brush on a thin coat of varnish.
- Let it dry, then add two or more thin coats.
- Seal every surface, including the base and inside any holes.
What sealed air dry clay is fine for
- Décor, figurines and name boards indoors
- Fridge magnets and wall pieces
- Jewellery that is kept dry
What to avoid
- Holding water: vases for fresh flowers, planters, bird baths
- Food and drink use
- Outdoor pieces exposed to rain
- Washing; dust with a soft dry brush instead
Related: Seal before or after painting?
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