That polymers are weather- and corrosion-resistant, water-repellent, mould-resistant, with no release of substances to the water or air and a low risk of fire propagation. Polyvinyl chloride (PVC) and polycarbonate (PC) for windows, coatings, waterproofing and thermal and acoustic insulation. Very high-performance products in terms of energy efficiency, elasticity, durability and aesthetics, with low maintenance requirements and maximum colour possibilities.