PDS 3 Flexible VET (Poly-Vinyl Chloride/Ethylene Vinyl Acetate-Terpolymer), homogeneous and those with polyester-fleece backing and polyester glass fibre carriersSingle Ply Roofing Association
PDS 2 Flexible PVC (plasticized Poly-Vinyl Chloride), homogeneous and those with polyester glassSingle Ply Roofing Association
PDS 4 Flexible Chlorosulphonated Polyethylene (CSM) polyester reinforced, unreinforced or with polyester fleece or mineral fibre backingSingle Ply Roofing Association