Johannesburg, South Africa
Flexible water storage bladders, engineered for every application.
FlexiDam supplies food-grade PVC liners and durable heavy-weight PVC liners, and fabricates them into flexible water storage bladders for potable supply, agriculture, mining and industry across South Africa.
- 720g/m²
- Food-grade liner
- 800g/m²
- Heavy-duty liner
- 2500N/50mm
- Warp tensile strength
- 0.58-0.62mm
- Membrane thickness
Food-grade and heavy-duty PVC
AS/NZS 4020 approved potable range
SANS & ISO tested
Made for South African conditions
Come and see us
FlexiDam will be at KragDag 2026.
Come and look at the membrane and a finished tank in person, and talk sizes with us on the stand.
- 6 to 8 August 2026
- 08:00 to 17:00 daily
- Diamantvallei, Cullinan, Gauteng
KragDag special · August only
Order a tank in August, get free raffle entries.
Every FlexiDam tank ordered during August comes with free entries into the SASFA Recce Footprint™ Toyota Land Cruiser 79 raffle. The bigger the tank, the more entries you earn:
- 30kl – 50kl×1 ticket
- 100kl – 150kl×2 tickets
- 200kl – 250kl×3 tickets
- 300kl×4 tickets
- 500kl×5 tickets
What we supply
Finished flexible tanks, in two liner grades.
Every tank is welded to order from the liner that fits the job: food-grade where people will drink the water, heavy-duty where they will not. Purchased outright or rented for the duration of a job.
Potable water tanks, 720gsm food-grade
Pillow tanks and bladder reservoirs welded from 720gsm food-grade PVC, formulated for safe contact with drinking water. Closed to light and air, so no algae and no evaporation.
- AS/NZS 4020 approved for drinking water contact
- Welded, not stitched: a single continuous membrane
- Published SANS and ISO test figures to design against
- Sized to the footprint you actually have
Heavy-duty tanks, 800gsm
The same welded construction in a durable 800gsm heavy-weight PVC, for irrigation, livestock, process water and containment where food-grade approval is not required.
- The economical choice for farm and industrial storage
- Durable heavy-weight PVC on a woven base
- Folds flat for transport and redeployment
- Available to buy, or to rent for temporary work
Why the material matters
Seven things a water storage membrane has to get right.
Every claim below is a line on the datasheet, tested to a published SANS or ISO method.
Food grade PVC
Formulated for safe contact with drinking water.
Australian Water Board approved
Certified to AS/NZS 4020 for products in contact with drinking water.
Woven polyester reinforcement
A high-strength base fabric carries the load, not the coating.
Tear & tensile resistance
2500 N/50mm warp tensile strength; 300 N warp tear strength.
Superior weldability
Welds cleanly for custom fabrication, at 40 N/25mm weld adhesion.
Multilayer coating
A multilayer coating process for improved waterhead resistance.
Gloss emboss finish
Durable surface that stays easy to clean.
The full datasheet, published.
Test methods, units, warp and weft figures. Nothing held back for the sales call.
Read the specificationsApplications
Where FlexiDam is put to work.
From a farm's irrigation buffer to emergency water supply on a mine site.
- Water storage bladders
- Emergency water storage
- Firefighting reserve
- Agricultural reservoirs
- Mining water storage
- Industrial containment
- Flexible water tanks
- Temporary storage
KragDag 2026
From the stand at KragDag.
A filled tank to climb on, the membrane to put your hands on, and the people who weld them. Find us at Diamantvallei, Cullinan, Gauteng, 6 to 8 August 2026.
Built for reliability. Made for water.
Tell us the volume, the site and what you are storing. We will come back with a specification and a price.