2. Functions of products.
A. Improve watertightness of building,prevent the construction from the invastion of wind and rain, protecting the structural materials and equipments inside roof and wall. 

B. Improve the energy saving and insulation effect. Due to the unique water proof and vapour permeable performance, when forming the protection to the insulating layer,it can also effectively avoid the negative influence from the temperature difference between interior and exterior. Hence, it increasing the effects of insulation and energy saving as well as providing the continuously energy saving.

C. Shorten the construction period. thanks to the good water resistant performance, interior construction and exterior can be performed at the same time so that shorten the construction period, reduce the construction cost.

D. Improve the resistantial environment. Because of the special breathable function, the interior vapour can nature exhaust, will effectively avoid mould and condensation, keep dry, permeate and comportable indoor, improve the residential environment.