All our tanks are hand made from high grade rigid HDPE, PE 100, or Polypropylene. We use a mbination of hot air and extrusion welding to the internationally rOkaygnised standard DVS 2205. 1/2 inch resist rrosion hdpe panel for water tank Apr 24, 2022 · 10mm HDPE sheets . lored HDPE sheets 4x8 .