What about waterproof coating like steel roof?
When it is still wet, place a suitable size of sewn polyester cloth on it to ensure that the polyester fabric does not blister or wrinkle,
Clean the surface first,Then, in the steel structure of the lap joints, screws, pipes, fans, lighting panels, roof and other places easy to leak brush coated with base paint,
Then the base paint soaked sewing polyester cloth to dry (17-19 square meters /5Gallon coating base),Finally coated with two layers of surface coatings (surface coating amount 33-35 /5Gallon square meters).
