How Do You Seal Air Dry Clay Jewelry?
Air dry clay, also called pottery clay or modeling clay, is a type of crafting clay that hardens naturally through evaporation. It is often made from a mixture of water, clay minerals, and natural glues or binders. Unlike kiln-fired clay, air dry clay does not require heat to harden. This makes it an accessible and easy-to-use material for creating jewelry, sculptures, decorations, and other crafts.
Air dry clay is beloved by jewelry makers for its versatility. It can be shaped by hand or molded. After drying, it can be sanded, drilled, painted, and embellished. Air dry clay jewelry has an artisan, handmade look when finished. Common techniques for making jewelry with air dry clay include hand molding beads, using clay extruders or dies to create reproducible shapes, and rolling out thin sheets of clay for cutting out pendants or charms. The lightweight nature of finished air dry clay pieces makes it comfortable for wearing in necklaces, earrings, and bracelets.
Supplies Needed
To seal air dry clay jewelry, you’ll need the following supplies:
Sealers – The main sealing product you’ll need is a clear sealer like varnish, glaze or polyurethane. This is what will protect the clay from damage. Some popular options include:
- Polyurethane – This clear, water-based sealer provides a high-gloss finish. It dries quickly and is easy to apply.
- Acrylic glaze – Glazes provide a shiny finish and protect the clay from moisture and scratches.
- Varnish – Varnish comes in matte, satin or gloss finishes. It seals and protects clay while providing a classic look.
Make sure to choose a sealer designed for the type of clay you used.
Sealing Steps
Once your air dry clay creation is fully dry and cured, you’ll want to seal it before using it or putting it on display. Air dry clay is porous, so sealing is an important step to protect the clay from moisture, dirt, and potential damage or deterioration over time. Here are the key steps for properly sealing air dry clay jewelry and crafts:
Let Clay Fully Dry and Cure: It’s crucial to let your finished clay piece dry and cure completely before sealing. Drying takes 24-48 hours and curing can take 1-2 weeks, depending on the thickness of the clay. Rushing to seal wet clay will trap moisture and could cause cracking or other issues. Be patient and let the clay fully harden first.
Clean Before Sealing: Make sure to clean your piece thoroughly before sealing, since any dust, dirt or debris left on the surface could get trapped under the sealant. Gently wipe down with a soft cloth or brush. Ensure the clay is free of any oil, fingerprints, or residue before sealing for best results.
Varnish
Varnish is a common sealant used for sealing air dry clay jewelry. There are a few types of varnish that work well:
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Polyurethane – This provides a durable, protective coating that dries clear and resists yellowing over time.
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Matte varnish – This gives a flat, non-glossy finish.
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Gloss varnish – This gives a shiny, glossy finish.
To apply varnish:
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Make sure your clay piece is completely dry and cured.
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Apply a thin, even coat of varnish using a soft paintbrush. Avoid over-brushing.
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Allow the varnish to dry completely. Drying times vary based on type of varnish used.
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Apply additional coats if desired, allowing each coat to dry in between.
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Once fully dry, the varnish will seal and protect the clay.
Glaze
Glaze is a popular choice for sealing air dry clay. There are a few types of glaze that work well:
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Acrylic glaze – This water-based glaze dries clear and adds a shiny finish. It’s easy to apply with a brush.
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Ceramic glaze – Ceramic glazes like ones made for polymer clay also work on air dry clay. These often give a glossy, glass-like finish.
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Resin glaze – Some glazes are resin-based and provide a durable, high-gloss coat.
To apply acrylic glaze:
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Make sure your air dry clay piece is fully dry and cured.
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Clean the surface of any dust.
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Use a soft brush to apply a thin layer of glaze over the entire piece.
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Allow the glaze to dry for at least 24 hours. Applying multiple thin coats will provide better protection.
Glazes often require curing in the oven according to package directions. Resin glazes especially need a heating phase to fully set. This makes the piece no longer strictly air dry clay, but helps ensure a durable finish.
Polyurethane
Polyurethane is a common sealant used for sealing air dry clay. It provides a protective coating that is waterproof and durable. When using polyurethane, be sure to apply thin coats and allow proper drying time between coats.
To apply polyurethane to air dry clay jewelry pieces, first ensure the clay is completely dry and cured. Clay that is not fully dry can react poorly to the polyurethane. Work in a well-ventilated area and use a high quality brush to smoothly apply the polyurethane. Avoid over-brushing as this can create excess bubbles. Let the piece dry for at least 8 hours before applying a second coat. Two to three thin coats are recommended for best protection.
Proper drying time is crucial when using polyurethane. Let the piece dry for at least 24 hours between coats. Humidity and low temperatures can increase drying time. Allow the final coat to dry for 48-72 hours before wearing or handling the jewelry. This ensures the polyurethane has fully cured and will provide maximum protection.
Resin
Two-part epoxy resin is a popular sealant for air dry clay jewelry that gives a durable, high-gloss finish. When using resin, make sure to work in a well ventilated area. To apply the resin:
- Prepare the clay by sanding it smooth and clean off any dust.
- Mix equal parts resin and hardener according to package directions.
- Use a disposable brush or popsicle stick to coat the entire surface with a thin layer of resin.
- Allow it to fully cure for 24-48 hours.
- Lightly sand again and apply a second coat if desired for a thicker finish.
Resin creates a durable, waterproof seal on air dry clay. The high gloss finish accentuates the clay’s colors and patterns beautifully. Take care to thoroughly mix the resin and use proper ventilation when applying.
Wax
Wax is a good sealing option for air dry clay jewelry. When applying wax, use a soft brush or cloth to rub a thin layer over the entire piece. Allow the wax to fully soak in and dry. Then, buff the jewelry with a soft cloth to create a nice sheen. You can find specialty waxes made for sealing crafts, but household wax like paste wax also works well. The main benefit of sealing with wax is that it brings out the clay’s natural color and leaves a smooth, lustrous finish. It helps protect the clay from moisture and prevents fingerprints or smudges. Wax is easy to reapply over time if the finish starts to dull. Just add another thin coat and buff it out. With proper care, wax creates a durable seal that keeps air dry clay jewelry looking great.
Lacquer
Lacquer is a common sealant used for air dry clay jewelry. When using lacquer, it’s best to opt for an acrylic spray lacquer. Make sure to apply the lacquer in a well-ventilated area and avoid breathing in the fumes. Hold the can 10-12 inches away from the jewelry and apply light, even coats using a sweeping motion. Let each coat dry completely before applying the next. Most lacquers take 15-30 minutes to fully cure. Be patient and allow ample drying time between coats. Applying too many wet coats can cause dripping, bubbling, and uneven coverage. 2-3 light coats is usually sufficient for a protective seal on air dry clay. Let the piece sit untouched for at least 24 hours to fully cure before wearing or handling the jewelry.
Conclusion
There are several effective options for sealing air dry clay jewelry. Varnish, glaze, polyurethane, and resin all provide durable, water-resistant seals. Wax and lacquer are good options as well, but may require more frequent reapplication over time.
Of these options, polyurethane provides one of the most protective seals. It forms a hard, plastic-like coating over the clay that is very durable and waterproof. Two-part resin also creates an extremely tough, durable seal. Varnish and glaze are good all-purpose sealing options that are easy to apply. Wax and lacquer tend to wear over time but provide nice finishes.
Test different sealants on sample pieces to determine which option works best for your particular clay jewelry designs. Multiple thin layers often create the most effective seal. Always allow each layer to fully dry before adding another. With the right sealing process, you can create durable, long-lasting air dry clay jewelry.
