SIGA products are free of VOC, Solvents, High boilers, Plasticisers, Chlorine, Formaldehyde, Caoutcho. NO OFF-GASSING means healthier Internal Air Quality and no degradation of product quality over time. Unique in the industry, since 1966 SIGA products are made in its purpose-built facilities, not outsourced. Your professional integrity is assured with Europe's leading premium brand of Airtight Weathertight Diffusible Membranes & Tapes.