These sheets are manufactured from non-stick virgin PTFE and are used as a top for workbenches, industrial gaskets, wear surfaces, drainboards, sinks, and shelf liners. They are non-porous and non-absorbent and therefore will not retain odors. Easily bonded with #RBRS-32 Rubber Cement for semi-permanent and use #GSI-100 with #PP-50 Polyprimer for permanent bonds. The surface must be wiped down with the Polyprimer. If you require etched one side sheets, longer lengths, and/or volume pricing please call us at 1-800-331-7724. Product meets FDA 21 CFR177.1550, ASTMD3308, D3294 . Temperature rated to -350°F to +500°F. Tolerance: +/- 1/2" on length & width. Manufactured in the United States.