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Products & specifications

720gsm potable water PVC liner

Product code 720 PW 300. Food grade plasticised PVC over a high-strength woven polyester base, fabricated by us into finished flexible tanks. Also available in an 800gsm heavy-duty grade below.

The FlexiDam team in front of a filled flexible water tank fabricated from PVC liner, on the stand at KragDag 2026

Product description

Safe. Durable. Engineered for drinking water.

  • Food grade PVC liner
  • Specially formulated to ensure safe contact with drinking water
  • Approved by the Australian Water Board (AS/NZS 4020)
  • Multilayer coating process for improved waterhead
  • Food grade PVC
  • Australian Water Board approved
  • Woven polyester reinforcement
  • Tear & tensile resistance
  • Superior weldability
  • Multilayer coating
  • Gloss emboss finish

Technical specifications

720 PW 300

As supplied. Roll dimensions are nominal; thickness is the measured range across the coated web.

Technical specifications for FlexiDam 720 PW 300
Product code720 PW 300
Product description720G Potable Water 3m
FormulationFood grade plasticised PVC
Base fabricWoven polyester
Visually inspected and gradedYes
Product weight720 g/m²
Product width3 m
Roll length50 m
Emboss finishGloss
PackagingOn core, in plastic sleeve
Approximate thickness0.58 to 0.62 mm

Typical properties

Tested figures, with the method beside them.

Warp and weft are reported separately because a woven base behaves differently along each axis, so design to the lower of the two.

  • Tensile strength

    SANS 1421: 1998 · N/50mm

    Warp
    2500
    Weft
    2200
  • Tear strength

    ISO 4674-1: 2016 Method B · N

    Warp
    300
    Weft
    250
  • Weld adhesion

    ISO 2411: 2017 · N/25mm

    Warp
    40
    Weft
    40
  • Flame retardancy

    SANS 1287-1: 2007 · s

    Warp
    NA
    Weft
    NA
  • Electrical resistance

    SANS 5880: 2008 · MΩ

    Warp
    NA
    Weft
    NA
  • Fusion, 5 min in acetone

    n/a · n/a

    No flaking

NA means not applicable. Figures are typical values from production testing, not guaranteed minima; confirm against the batch certificate for a specific order.

Heavy-duty range

800gsm heavy-duty PVC liner

A durable heavy-weight PVC on the same woven polyester base, welded into tanks for storage that does not need drinking water approval.

  • Durable 800gsm heavy-weight PVC on a woven polyester base
  • The economical choice for irrigation, livestock and process water
  • Same welded, single-membrane tank construction as the potable range
  • Fabricated to your footprint, available to buy or to rent

The full 800gsm datasheet is available on request; tell us what you are storing and we will send it with the quote.

Which liner does your job need?

If people will drink the water, specify the 720gsm food-grade liner with its AS/NZS 4020 approval. For irrigation, livestock, process water, dust suppression and containment, the 800gsm heavy-duty liner stores the same water at a lower cost.

Potable or heavy-duty? Tell us what you are storing.