How to Seal Polymer Clay

Polymer clay is a versatile and popular medium for crafting a wide range of art projects, from intricate jewelry to decorative sculptures. While creating pieces with polymer clay is an exciting process, sealing your creations is essential to ensure their longevity and durability. Proper sealing not only protects your artwork from dust, moisture, and wear but also enhances its color and finish. In this guide, we’ll explore how to seal polymer clay, ensuring they remain vibrant and intact for years to come.

Why Seal Polymer Clay

Sealing polymer clay is crucial for several reasons. Firstly, a sealant acts as a protective layer that shields your creation from environmental factors, such as dust and moisture, which could otherwise lead to discoloration or degradation over time. Secondly, some sealants can add a glossy or matte finish, enhancing the visual appeal and bringing out the vividness of the colors used in your pieces. Finally, sealed polymer clay items are more resistant to handling and wear, preserving the intricate details and preventing surface scratches. Altogether, sealing your polymer clay projects not only safeguards them but also elevates their aesthetic and tactile qualities.

Polymer Clay Crafting and Its Popularity

Polymer clay crafting has surged in popularity in recent years, captivating artists and hobbyists alike with its pliability and vibrant colors. This synthetic modeling material is celebrated for its ability to be molded into an infinite variety of shapes and designs, allowing creators to explore their imagination without constraints.

From professional artists to beginners, people appreciate polymer clay for its ease of use and accessibility, making it an ideal medium for both simple and complex projects. The versatility of polymer clay extends beyond traditional sculpting, often being used in jewelry making, home decor, and even as embellishments for various crafts. As social media platforms provide a venue for showcasing creative works, the community around polymer clay continues to grow, inspiring even more innovative applications and techniques.

10 Methods How to Seal Polymer Clay

1. Choose the Right Sealer Based on Your Project Needs

Before starting, select a sealer that complements your polymer clay project’s requirements. Decide if you want a matte, satin, or glossy finish, as each type of sealer will create a different look. For a subtle, natural appearance, opt for a matte finish, while gloss sealers offer a shiny, polished look. Reading labels and understanding the properties of different sealers, such as polyurethane, acrylic, or epoxy, will help you pick the best one for your project.

2. Use a Water-Based Polyurethane Sealer for Durability

Water-based polyurethane sealers are ideal for adding a durable layer to polymer clay creations, especially for items that may face wear and tear, such as jewelry or keychains. Water-based sealers dry clear and have minimal odor, making them easy to use in any workspace. Apply with a soft brush in thin, even layers, allowing each coat to dry before adding another. Polyurethane creates a robust seal, preventing chips and scratches.

3. Apply a Thin Layer of Gloss Varnish for a Shiny Finish

Gloss varnish is an excellent choice if you want a high-gloss, mirror-like finish. Use a varnish specifically designed for polymer clay, as some varnishes may react poorly with certain brands of clay, causing tackiness or stickiness. Apply the gloss varnish with a small brush, carefully covering the entire surface in thin coats. This method provides an eye-catching shine, perfect for decorative items or bright-colored pieces.

4. Try Resin for an Ultra-Glossy, Long-Lasting Seal

For a professional, ultra-glossy finish, resin is one of the best options available. Epoxy resin adds significant durability and a glass-like shine, ideal for jewelry and keepsakes. Mix the resin according to package instructions and apply it carefully over the clay surface. Use a small brush or pour it directly for an even coat, and remove any bubbles with a heat gun or torch. Resin takes longer to cure but provides a long-lasting, protective seal that enhances colors beautifully.

5. Use Acrylic Spray Sealer for Quick and Easy Coverage

Acrylic spray sealers are fast and convenient, providing an even coat over larger or intricate pieces. Choose a spray sealer specifically labeled for polymer clay to avoid unwanted reactions. Hold the can about 8–10 inches from the piece and apply light coats, letting each layer dry before adding the next. Acrylic sprays are available in various finishes, from matte to gloss, making them a versatile choice for different project styles.

6. Experiment with Liquid Clay for Subtle, Soft Finishes

Liquid clay is a unique way to seal polymer clay, offering a soft, matte finish. To use liquid clay as a sealer, brush a thin layer over your piece, then bake it again in the oven as per the instructions. The result is a subtle, skin-like layer that enhances the clay’s texture without overwhelming it. Liquid clay can be particularly effective for sealing raw clay or adding a slight sheen while keeping the piece looking natural.

7. Use Mod Podge for a Budget-Friendly, Multi-Use Sealer

Mod Podge is a popular, budget-friendly sealer for polymer clay that works well for projects that won’t encounter heavy wear. It’s available in a variety of finishes, including matte and gloss, and can be applied with a soft brush. Although it may not offer as durable a finish as polyurethane or resin, Mod Podge is easy to apply and dries clear. For items like ornaments or decorative pieces, Mod Podge can provide a lovely, cost-effective seal.

8. Sand and Buff Before Sealing for a Smooth, Professional Look

Before applying any sealer, consider sanding and buffing your polymer clay piece to create a smooth surface. Use fine-grit sandpaper and gently sand any rough spots or imperfections. Once sanded, buff the piece with a soft cloth or a dremel to achieve a polished surface. This step not only enhances the sealer’s adhesion but also improves the overall finish, making the final piece look professional and refined.

9. Layer Thin Coats of Sealer for Enhanced Protection

When applying any type of sealer, thin, multiple layers are often better than a single thick layer. Thin coats dry more evenly and prevent streaking or bubbling. After each coat, allow it to dry completely before adding the next. This layered approach ensures a stronger, longer-lasting seal that better protects the polymer clay piece from moisture, dust, and general wear.

10. Store and Display Finished Pieces in Safe Conditions

After sealing, it’s essential to store and display your polymer clay items properly. Avoid exposing sealed pieces to extreme heat or direct sunlight, as UV rays can fade colors over time and even degrade certain sealers. Consider storing delicate items in a cool, dry place or displaying them under glass to minimize dust and exposure. This final step preserves the longevity of your hard work, keeping your creations looking vibrant and well-maintained.

Alternative Methods and Tips for Sealing Polymer Clay

Sealing polymer clay is not a one-size-fits-all process, and sometimes traditional sealers may not meet all your project needs. Here are some alternative methods and tips to consider:

1. Use Beeswax for a Natural Finish

If you prefer eco-friendly materials, beeswax can be an excellent natural alternative for sealing polymer clay. It provides a soft, matte finish and can be buffed to a gentle shine. To use, melt a small amount of beeswax and lightly brush it onto the clay surface. Once dry, buff with a soft cloth for a subtle, protective layer.

2. Explore Oil-Based Sealers for Weather-Resistant Projects

For outdoor or weather-exposed projects, consider using oil-based sealers, which offer excellent water resistance. These sealers are ideal for garden decor or items that need to withstand the elements. However, be mindful of potential yellowing with age, and test on a small sample before applying to your final piece.

3. Use Gel Mediums for Unique Textures

Gel mediums, typically used in painting, can add interesting textures to polymer clay surfaces while sealing them. Apply in thin layers with a palette knife for a textured appearance or brush on for a smoother surface. These mediums often dry clear and can enhance the tactile qualities of your piece.

4. Incorporate Natural Oils for a Subtle Sheen

For a simple, natural coating, lightly rub olive or mineral oil onto polymer clay pieces. This method offers a gentle sheen and can condition the clay surface. Note that oils should be absorbed well to avoid sticky residue and may require reapplication over time.

Conclusion

Sealing your polymer clay creations effectively enhances their durability, appearance, and longevity. By choosing the right sealer for your project’s needs, whether it’s a water-based polyurethane for durability or a gloss varnish for a shiny finish, you ensure your pieces maintain their intended aesthetic and withstand daily use. Remember to prepare your clay surfaces with thorough sanding and buffing, apply multiple thin layers of sealer, and store your finished creations in appropriate conditions to protect them from environmental factors. These steps will ensure that your art remains as beautiful as when you first created it, giving you the satisfaction of knowing that you preserved your work with care and precision.