The main reason why Himei waterproof tiles can ensure sealing through hot air welding is its process characteristics. In this welding process, the surface of the TPO material is heated to the melting point with a hot air gun, and the two TPO layers are fused under a certain pressure. Under the action of this high-temperature hot air, the TPO material becomes plastic and sticky, allowing the two welded surfaces to be tightly bonded. After the welding is completed, the TPO material re-solidifies during the cooling process to form an integrated structure, thereby ensuring the sealing of the weld. This hot air welding method can not only effectively eliminate air gaps, but also provide uniform welding strength, making the connection parts of the waterproof tiles have high weather resistance and penetration resistance, ultimately ensuring the sealing performance of the welding parts.