Zena-seal (zswp100) single ply black membranes are light weight and have exceptional long lasting elasticity permitting the materials to withstand building movement, expansion - contraction of building surfaces, high resistance to ozone and weather as they are known as “crack-less rubbers”, low specific gravity - lightest among all rubbers, widest temperature range from - 50°c to + 150°c, excellent steam and water resistance. 1.2mtr wide and 10mtr long