Fire retardant flexible building wrap for use as a sarking on walls in order to provide vapour permeability to buildings, limit the entry of wind into building cavities and act as a secondary barrier to wind-driven rain. It also gives UV resistance for up to 60 days. Fire retardant. Suitable for all wall cladding systems. For use on timber or steel framed buildings. The product is manufactured from high-quality synthetic spun-bonded material.