Waterproof membranes are frequently made from flexible PVC, given its excellent resistance to weathering in outdoor conditions.
The membranes made from 300 series resins are manufactured by the coating of natural or synthetic fabrics (impregnation layer and upper layer). Using the 200 series resins (suspension process), the membranes are made by the  calendering or  extrusion process using flat dies.

SolVin®/Siamvic® S-PVC - Solvin® PVC-E - Vinyloop® PVC-R - Benvic® Rigid PVC Compound