Silastic® (a portmanteau of 'silicone' and 'plastic') is a trademark registered in 1948 by Dow Corning Corporationhttp://www.uspto.gov for flexible, inert silicone elastomer. Today, the Silastic trademark refers to silicone elastomers, silicone tubing and some cross-linked polydimethylsiloxane materials manufactured by Dow Corning, the owner of the global trademark.