While it is true that silicon can withstand high temperatures, it is important to remember that dishwashers use very hot water and strong detergents.  If you want to put your silicone molds in your dishwasher, do not use intensive programs that exceed 260 degrees celsius or 500F.  It’s also better not to use abrasive detergent when washing your silicone bakeware in a dishwasher. Always refer to the manufacturer’s instructions when washing your silicone mold. Dishwasher cleaning is still to be avoided if you want to keep your molds as long as possible.