We do not recommend placing a plastic mold in the oven, but you can do so with a silicone mold. This will speed up the curing time. Turn your oven to 150 degrees Fahrenheit (65 degrees Celsius), and then place the mold in the oven for roughly five minutes. You can then switch off the oven and leave the item in the oven as it cools down. If you are going to apply more layers of resin you can repeat this process. Keep in mind you will need to use an oven that will not be used for food afterward as the fumes can be toxic.