Will polymer clay melt in the sun?

Polymer clay is a versatile and popular crafting material known for its ability to be molded, sculpted, and baked to create various projects. However, concerns may arise about how polymer clay reacts to sunlight and whether it has the potential to melt or become damaged when exposed to the sun’s rays. In this article, we’ll explore the effects of sunlight on polymer clay and provide insights into its behavior under different conditions.

1. Heat Resistance

Heat and Polymer Clay:

Understanding temperature thresholds:

Polymer clay is designed to withstand the heat generated during the baking process, which occurs in an oven at specific temperatures. While polymer clay is heat-resistant under controlled baking conditions, it may have different reactions when exposed to direct sunlight and the outdoor environment.

2. Softening and Distortion

Softening in High Temperatures:

Potential for softening:

Exposing polymer clay to high temperatures, such as those found in direct sunlight on a hot day, may cause the clay to soften or become pliable. This can lead to distortion, warping, or even partial melting of the clay if the temperature is significantly elevated.

3. Color Fading

Effects on Color:

Fading and changes in appearance:

Prolonged exposure to sunlight can also affect the color of polymer clay. The vibrant colors of the clay may fade over time when subjected to the ultraviolet (UV) rays present in sunlight. This can result in a change in the appearance of the finished piece.

4. Protection and Precautions

Minimizing Sun Exposure:

Storing and displaying polymer clay:

To protect polymer clay creations from potential damage caused by sunlight, it’s advisable to store and display them in areas away from direct sunlight. If you plan to use polymer clay items outdoors, consider applying a protective sealant or varnish that can help mitigate the effects of UV rays and provide an extra layer of defense.


While polymer clay is heat-resistant within the context of its intended use, it may be susceptible to softening, distortion, and color fading when exposed to prolonged sunlight. It’s important to take precautions and store or display polymer clay items in areas with minimal sun exposure to ensure their longevity and appearance. By understanding the potential effects of sunlight on polymer clay and implementing protective measures, crafters can create and enjoy their polymer clay creations while minimizing the risk of damage caused by outdoor conditions.

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