High Density Polyethylene Self-adhesive Waterproof Membrane. Width(m):1.2,2.4 Thickness(mm):1.2,1.5, Length(m):20 Area(㎡/Roll):24,48 (release film surface self-adhesive hdpe waterproof membrane structure ) (Sand surface self-adhesive hdpe waterproof membrane structure ) Description: High Density Polyethylene Self-adhesive Waterproof Membrane