Yes! Silicone has a much higher heat resistance than other plastic spatulas, which means that it can withstand the heat of cast iron surfaces. Just to be on the safe side, it’s not recommended to leave a silicone spatula on a hot cast iron surface for long periods without movement to prevent melting. If you can use silicone cupcake molds in an oven, you can definitely use a silicone utensil on a cast iron pan, skillet, or grill. The best thing about silicone is that it won’t work to scratch off any seasoning on a cast iron surface!