SIG Sp z o.o. is a leading distributor of specialist building systems and materials. It is part of SIG plc, an international company.

In the Polish market SIG is made up of individual brands: INTERIOR ZACHÓD, MELLE, SITACO, TBS, WIG, WKT, WODAN.

SIG is a leader in the industry and has a dominant share in the main market sectors of: dry lining, suspended ceilings, building and technical insulation, and roofing. The SIG brands offer a comprehensive range of materials used at each stage of construction and finishing work.