What is silicone tube made of?

The silicone tubing formed by platinum-cured material may not be as strong as peroxide-cured silicone, but it has fewer potential leachables, a smoother surface, less protein binding and better clarity. The main deficiency of silicone tubing is its poor shape memory; if deformed, silicone will keep its deformation instead of returning to its original shape. In this way, latex tubing and other synthetic tubing materials can be better choices than silicone. Still, silicone's many favorable qualities make it an excellent choice in many applications.