ventilation duct fabric with a matt finish.This PVC fabric is completely waterproof, fire retardent, anti-static,very strong and durable. PVC tarpaulin is a three-ply fabric consisting of a piece of scrim laminated between two sheets of polyvinyl film (PVC). Ventilation duct material with a matt finish. This PVC fabric is completely waterproof, fire retardent, anti-static,very strong and durable.