Strong Weave 77 is a 7?7 Woven Reinforced Polyethylene sheeting available in either Fire-Retardant or Non-Fire-Retardant. Our Strong Weave 77 is crafted from strips of polyethylene which are woven together and coated on both sides for added strength. Puncture and tear resistant, our material is UV-treated and designed to repel water. This lightweight material is easy to install, yet durable enough for weather protection, scaffold enclosures and much more.