Silicone Cake Bake Tray Can be used in temps from -40 degrees to +230 degrees Celsius. They're freezer, refrigerator, microwave, dishwasher and oven safe. Bake, store, freeze and reheat right in the pans. No rusting or staining. . Easy to clean up. Lightweight and perfect for a camper or RV. Silicone is resistant to heat and cold, durable, non-stick, easy to clean, and resistant to food acids and chemicals. Use silicone in ovens, freezers and microwaves. Silicone is easy to clean and dishwasher safe. The silicone items that come in contact with food meet FDA (Food and Drug Administration) safety requirements.