Hard Rubber Substance Used in Baking Trays

This page is the CodyCross answer for the clue below from Art Museum, Group 725, Puzzle 3 (Showcasing).

Question is: Hard Rubber Substance Used in Baking Trays

and the answer is: SILICONE

Word Meaning:

SILICONE — (chemistry) Any of a class of inert, semi-inorganic polymeric compounds (polysiloxanes), that have a wide range of thermal stability and extreme water repellence, used in a very wide range of industrial applications, and in prosthetic replacements for body parts.

Definitions from Wiktionary.