Flexitank specialise in the manufacture of Aquaculture cage liners for a variety of applications both on land and at sea.

Aquaculture cage liners, suited for sea based fish and worm farming, is a product solution Flexitank has been delivering for over 10 years.  Originally a companion to our popular and successful tank lining business, Flexitank has now developed complete aquaculture pen lining solutions offered to various aquaculture businesses around the globe.

Flexitank floating liners offer a product solution for floating salt and fresh water storage, suited to ocean borne aquaculture farming.  Aquaculture pen liners have been deployed around the globe to fight the spread of Salmo Salar amoebic gill disease and sea lice as well as the transportation of fresh water in large scale open top floating liners, and other natural and chemical treatment procedures, both in open water and inshore ocean environments.

Key aspects of the Flexitank floating pen Liner product offering:


Exclusively developed Aqualine range of polymer coated fabrics have proven track record and have excelled in field placement over the past 8 years

AqualineTM fabrics include product offerings in Thermal Poly Olefin (TPO), Thermal Poly Urethane (TPU), TPU/PVC blends, and high density poly ethylene (HDPE).


Flexitank Australia liners have been deployed in a of sizes, ranging from 10 metre diametre (31.43 metre circumference) to 105 metre diametre (330 metre circumference), with depths ranging from 2 metres to 7 metres


Flexitank Australia’s technical excellence across all facets of liner design and manufacture has meant that traditional problems experienced in both bathing and ocean borne fresh water transport liners are eradicated


Superior headboard hems, headboard handles, and pull out handle designs have been engineering to a standard never seen in the industry before, resulting in successful delivery of liners in many of the harshest ocean environments in the world

Flexitank supply an exclusive range of polymer fabrics, which are the backbone of our aquaculture pen liner product offering worldwide:

Through Flexitank Australia’s exclusive Aqualine range of polymer coated fabrics, developed in conjunction with key industry aqua culturists over the past 8 years, Floating Pen Liners have successfully been delivered and installed throughout in Australia, to Tasmanian Atlantic Salmon (Salmo Salar) farmers, as well as South Australian and New South Wales Yellowtail Kingfish (Seriola lalandi) farmers.

Our exclusive fabrics available are (click on the fabric to see specifications):

*Please note:

  • TPO has a positive SG and is designed for applications where the liners are required to float
  • PU/PVC blend & Straight PVC have a negative SG and are designed for applications where the liners are required to sink


Check out aquaculture cage liners in action:

Want to know more?

Send us your enquiry and we will assist you in any way we can