... 2.Auto function Water proofing and roofing welder, PVC Roofing welding machine,Plastic welding machine(PVC,TPO ,EVA membrane) ... such as roofing sheets, container cover, advertising cloth, plastic cloth. Temperature continuously adjustable,high precision. Smooth,high speed ... Welding width: 40mm Water proofing and roofing welder, PVC Roofing welding machine,Plastic welding machine(PVC,TPO ,EVA membrane)