Important! Instructions for Using the Foam Sponge for Baking Polymer Clay

1. Material purpose
   This foam is originally a technical material designed for sound insulation. It is not food-safe and should be used only for hobby and craft purposes.

2. Temperature range

   • The material can withstand temperatures up to 110–130 °C (230–265 °F).

   • Do not exceed this limit — at higher temperatures, the foam may begin to degrade.

3. Smoke and odor

   • During baking, a small amount of smoke or odor may appear.

   • This is normal, but make sure the room is well-ventilated.

4. Oven use guidelines

   • Do not place the foam directly on a solid metal tray. It’s better to put it on an oven rack.

   • To reduce heat from the rack bars, you can place a layer of foil underneath.

   • If your oven is small and the heating elements are too close, make a protective “roof” from foil above the sponge.

   • Wait until the oven has fully preheated and the temperature is stable before placing the sponge inside, as ovens often overshoot the set temperature during heating.

5. Safety tips

   • Use only for crafts, not for food.

   • Do not exceed 130 °C (265 °F).

   • Always ventilate the room during baking.

You can see an example of how we use these sponges in the oven (starting at 31:00):
https://www.youtube.com/watch?v=Cg6U2eZxJcg