Can Air Dry Clay Get Wet? Understanding the Vulnerability and Preservation of Unfired Clay
The simple answer is yes, air dry clay can get wet, and it will soften and potentially dissolve. Unlike kiln-fired clay, air dry clay remains water-soluble even after it dries completely, making it crucial to protect your finished creations from moisture.
The Nature of Air Dry Clay and Water Absorption
Air dry clay, also known as polymer clay, modeling clay, or self-hardening clay, differs significantly from traditional earthenware or stoneware clay. It hardens through evaporation of water, rather than a chemical change induced by high temperatures in a kiln. This fundamental difference dictates its interaction with water post-drying. The binders used in air dry clay, while creating a solid form when dry, are still water-soluble. When exposed to water, these binders weaken, causing the clay to revert to a malleable or even liquid state. This susceptibility to moisture presents both challenges and opportunities in the creative process.
Protecting Your Air Dry Clay Creations
Understanding the vulnerability of air dry clay is the first step toward ensuring the longevity of your projects. The key lies in proper sealing and storage. Applying a protective coating, such as varnish, sealant, or acrylic paint, acts as a barrier, preventing water from penetrating the clay. Regular cleaning and avoidance of humid environments further contribute to preservation.
Frequently Asked Questions (FAQs) About Air Dry Clay and Water
This section addresses common concerns regarding the interaction between air dry clay and water, providing practical advice for artists and hobbyists.
What happens if air dry clay gets wet after it’s dried?
The clay will start to soften and become pliable again. Depending on the amount of water and the duration of exposure, it might simply become slightly mushy, or it could completely dissolve and turn into a slurry.
Can I fix a cracked piece of air dry clay by wetting it?
Yes, in some cases, you can. Lightly wetting the cracked area allows you to re-mold and smooth the clay, effectively patching the crack. However, avoid oversaturating the clay, as this can lead to warping or structural weakness. It’s best to use a small amount of water and work the clay carefully.
What type of sealant is best for protecting air dry clay from water?
Several sealants work well, including:
- Acrylic-based sealants: These provide a durable and water-resistant finish and are readily available in various gloss levels.
- Polyurethane sealants: Offer excellent protection against water and abrasion, making them suitable for items that will be handled frequently.
- Varnish: Specifically designed for protecting artwork, varnish provides a clear and durable layer that resists water damage.
Choose a non-yellowing sealant to preserve the original color of your clay creation.
Can I use air dry clay for outdoor projects?
It’s not recommended without significant protection. Due to its water-solubility, air dry clay is highly susceptible to damage from rain, humidity, and temperature fluctuations. If you want to use it outdoors, you must apply multiple layers of a heavy-duty, waterproof sealant and regularly maintain the finish. Even with thorough protection, the lifespan of air dry clay outdoors will likely be limited.
How do I clean air dry clay sculptures?
Gently dust them with a soft brush. If necessary, use a slightly damp (not wet!) cloth to wipe the surface. Avoid using excessive water or harsh cleaning chemicals, as these can damage the clay or sealant. Immediately dry any damp areas with a clean cloth.
Is air dry clay waterproof after sealing?
While sealing provides protection, no sealant makes air dry clay completely waterproof. Sealants are water-resistant, meaning they can repel water for a certain period. Prolonged exposure to water, such as soaking, can still damage the clay, even if it’s sealed. Think of it like a raincoat, not a submarine.
Can I paint air dry clay before sealing it?
Yes, and painting is often recommended. Acrylic paints work particularly well with air dry clay and provide an additional layer of protection. Let the paint dry completely before applying a sealant. Consider using a paint specifically formulated for crafts and miniatures for the best adhesion and durability.
Does the brand of air dry clay affect its water resistance?
Yes, to some extent. Different brands use varying formulations, which can influence their resistance to moisture. Some brands may be slightly more durable or have better water-absorbing qualities than others. Reading reviews and experimenting with different brands is advisable to find one that suits your needs.
Can I use air dry clay in a fish tank or other aquatic environments?
Absolutely not. Air dry clay is toxic and will dissolve in water, contaminating the aquarium and harming or killing your fish. Only use materials specifically designed for aquatic environments.
How should I store air dry clay before it’s used to prevent it from drying out?
Store unopened clay in its original packaging, which is typically airtight. Once opened, wrap unused clay tightly in plastic wrap, then place it in an airtight container. Adding a damp sponge or cloth to the container can help maintain moisture levels. Check the clay regularly and add a few drops of water if it starts to dry out.
What happens if I accidentally wash air dry clay down the drain?
Air dry clay can cause clogs in drains because it rehydrates and expands. Avoid washing clay down the drain. Dispose of excess clay in the trash. If you suspect clay has gone down the drain, flush with plenty of hot water and consider using a drain cleaner specifically designed to dissolve clay. In severe cases, you may need to call a plumber.
Are there any alternatives to air dry clay that are more water-resistant?
Yes, polymer clay is a popular alternative that is significantly more water-resistant after baking. Polymer clay requires baking in an oven to harden and becomes durable and waterproof after curing. Epoxy clay and epoxy resin are also waterproof options. These alternatives are better suited for projects that will be exposed to moisture.