Why is my polymer clay melting in the oven?

Working with polymer clay can be a rewarding and creative experience, but encountering unexpected issues like melting during baking can be frustrating. Polymer clay is designed to cure and harden when exposed to the appropriate temperature in the oven, but there are several factors that can lead to melting instead of proper curing. In this article, we’ll explore the reasons behind polymer clay melting in the oven and provide solutions to help you achieve successful and consistent results.

1. Incorrect Baking Temperature

One of the most common reasons for polymer clay melting is baking at the wrong temperature. Polymer clay has a specific recommended baking temperature, which varies depending on the brand and type of clay. Baking at a higher temperature than recommended can cause the clay to melt, lose its shape, and become distorted. Always refer to the manufacturer’s instructions for the correct baking temperature and duration.

2. Oven Hot Spots

Ovens can have uneven temperature distribution, resulting in hot spots where the temperature is higher than in other areas. Placing your polymer clay creation in a hot spot can lead to uneven curing or melting. To avoid this, use an oven thermometer to monitor the temperature and place your clay on a baking sheet or tile to help distribute heat evenly.

3. Overbaking

Leaving polymer clay in the oven for too long can cause it to overbake and eventually melt. Overbaking can result in the clay becoming brittle, discolored, or losing its intended texture. Set a timer to ensure you remove the clay from the oven as soon as the recommended baking time is complete.

4. Thin Pieces or Improperly Supported Designs

Thin and delicate pieces of polymer clay can be more susceptible to melting if they are not properly supported during baking. Without proper support, the clay may droop or warp under its own weight when exposed to heat. Use armatures, aluminum foil, or other supports to help maintain the shape of your clay creations during baking.

5. Mixing Incompatible Clays

Sometimes, different brands or types of polymer clay have varying curing temperatures and characteristics. Mixing incompatible clays together without considering their properties can lead to melting or curing issues. If you want to combine clays, make sure they are compatible and have similar baking requirements.


If you find that your polymer clay is melting in the oven, it’s important to troubleshoot and identify the root cause. Correcting issues related to baking temperature, oven hot spots, overbaking, support for delicate pieces, and incompatible clay mixing can help you achieve successful and satisfying results. Always follow the manufacturer’s instructions, test a small piece before baking larger projects, and be mindful of the specific characteristics of the polymer clay you’re working with. By addressing these factors, you can avoid melting and enjoy the process of creating beautiful and durable polymer clay creations.

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