GCLS bentonite clay liner is a natural and non toxic materials which is waterproofing. 2 months after the construction, the fish is swimming in the pool freely. Sodium bentonite is a good and natural material which can be self healing while the construction. If you want to know more details please contact me at email: hongyuanmakela@163.com
![](https://i.ytimg.com/vi/vBkJRMCXYMo/maxresdefault.jpg)