IS SILICONE A PLASTIC? Good question. Here are some others... Is it a rubber? Is it natural? Is it synthetic? What the heck is it? And most importantly: Is it safe? Description and Typical Use: What is silicone? Technically, silicone is considered part of the rubber family. But, if you define plastics widely, as we do, silicone is something of a hybrid between a synthetic rubber and a synthetic plastic polymer . Silicone can be used to make malleable rubber-like items, hard resins, and spreadable fluids. We treat silicone as a plastic like any other, given that it has many plastic-like properties: flexibility, malleability, clarity, temperature resistance, water resistance. Like plastic, it can be shaped or formed and softened or hardened into practically anything. But it is a unique plastic because it is much more temperature resistant and durable than most plastics and has a low reactivity with chemicals. And while water resistant, it is also ...