Width (m):1.0 2.0 Thickness (mm):1.2,1.5,2.0. Length (m):25 Area (㎡/Roll):25,50. Description: Thermoplastic Polyolefin (TPO) Waterproof Membrane. INQUIRY EMAIL. "KD-P01" TPO waterproof sheet material is made out of the binder of thermoplastic polyolefin (TPO) which mbined by EPR and polypropylene with advanced polymerization technology.