TPO (thermoplastic polyolefin) waterproofing membrane and PVC (polyvinyl chloride) waterproofing membrane are different in material, performance and application. TPO waterproofing membrane uses thermoplastic polyolefin as the base material, has excellent UV resistance, chemical corrosion resistance, high temperature resistance, and is environmentally friendly and non-toxic. It has good welding performance, and hot air welding can be used during installation. It is suitable for various roofs and underground projects. PVC waterproofing membrane uses polyvinyl chloride as the main component, has good water resistance and acid and alkali resistance, but may be prone to aging in high temperature environments and is more susceptible to ultraviolet rays than TPO. PVC membrane is often used in building waterproofing and underground projects, and its welding process and seam treatment are relatively complicated. In general, TPO waterproofing membrane is more suitable for environments with high temperatures and strong ultraviolet rays, while PVC waterproofing membrane performs better in water resistance and chemical corrosion.