The production of roofing material and toly is based on the impregnation of the basis of tar. Permamin is produced using bitumen. Due to the lack of finalness, the bitumen mastic solved many problems related to the ecology:
The production of roofing material and toly is based on the impregnation of the basis of tar. Permamin is produced using bitumen. Due to the lack of finalness, the bitumen mastic solved many problems related to the ecology: