Seal and cushion channels in environments up to 450° F. These silicone rods are a good choice for use on hot equipment where polyurethane ones may melt. Not only do they endure oven-level heat but also sub-zero cold. It’s no wonder they’re often used in aviation, where scorching takeoffs are followed by freezing cold at high altitude. As for earthbound applications, these rods make good insulators for windows and car parts. They resist water, sunlight, and ozone, so you can use them outdoors.