TPO (thermoplastic polyolefin) waterproofing membrane can achieve waterproof effect after welding because the welding process melts the seams of the membrane through high temperature heating, and then fully combines them through pressure to form a continuous and seamless waterproof layer. This seamless connection method effectively prevents moisture from penetrating through the seams, thereby ensuring the overall waterproof performance. At the same time, the TPO material itself has good anti-aging, UV resistance and chemical corrosion resistance, which further enhances its waterproof effect and service life.