The short answer is no, you can´t. Polymer Clay will only harden when it is exposed to heat. Only once Polymer Clay is heated up a chemic reaction will harden the plastic clay. So you will need to harden your Polymer Clay in an oven following the instructions on the package. Will polymer clay harden without baking?
Do you need an oven to harden polymer clay?
Let out your inner artist by sculpting with polymer clays. You don't need an oven to harden polymer clay if you choose a clay that cures by air-drying. Check the package instructions, because polymer clay brands all have different curing temperatures.
Can you use a hair dryer to harden clay?
When you don't want to cure clays that harden at a specific temperature in the oven, you can use a heat gun, hair dryer or heat-embossing tool set to the desired temperature. Place the polymer clay creation on a nonstick surface, such as a piece of ceramic tile or block of wood.
Can I use cold porcelain clay instead of polymer?
Natural Cold Porcelain Clay is a perfect substitute for toxic polymer clay and allows for even finer detail and ease of sculpting. It’s also incredibly inexpensive and super simple to make. The clay is air-dried so no need for baking and it dries to a light weight, luminous, stone-like texture. Can you bake polymer clay on foil?
Does polymer clay crack easily?
Polymer clay when baked properly does not easily crack or break. However, both breaking and cracking can occur when the clay is not baked or cured properly. Cracking is almost always caused by insufficient curing or by baking a sculpture with uneven thicknesses throughout.
