In construction, roofing waterproof tiles play a vital role. They must not only withstand wind and rain, but also withstand the test of time. There are many kinds of TPO composite waterproof tiles on the market. However, many users ignore the back of the waterproof tiles when choosing. Many waterproof tiles do not have any anti-corrosion protective layer on the back. The protective layer on the back will directly affect the performance and durability of the waterproof tiles. Some factories will volatilize corrosive gases during production. If there is no protective layer on the bottom of the waterproof tiles, they will be corroded. This will cause damage to the roof structure and affect the overall service life. If there is an anti-corrosion layer on the bottom, it can isolate moisture and corrosive substances. Maintain the integrity of the tiles and extend their service life. With the protection of the anti-corrosion layer, the performance of the waterproof tiles is more durable. The frequency of maintenance and replacement is reduced, and the long-term cost is reduced. The TPO waterproof tiles produced by Himei Metal have a layer of PVDP anti-corrosion film added on the back. This film not only increases the durability of the waterproof tiles, but also increases its ability to resist high temperatures and UV rays. While ensuring the safety of the roof, it also brings long-term protection to the building.