Builders film is made by LDPE/LLDPE for damp proof,anti-leakage, ... :0.05mm-0.5mmSize: 4m*25m,4m*50m,6m*33mBuliders Film Applications:1.When fixing the floor,put it on the ... the cistern,put it on the bottom from leakage.3.Protect the building materials from damp and sunshine temporarily.4.Other ...