Canal Lining
Canal lining stops the seepage that drains irrigation and water-transfer channels before the water reaches the field. SIGMA supplies two proven canal lining solutions — an impermeable HDPE geomembrane for maximum water savings, and a concrete blanket for a hard-armoured channel surface — so you can match the canal lining to your flow, slope and durability needs.
HDPE geomembrane: the impermeable canal liner
Unlined earthen canals can lose a large share of their flow to seepage. An HDPE geomembrane canal liner is impermeable, so it keeps conveyed water in the channel and out of the surrounding ground. Welded into one continuous sheet, the high density polyethylene liner conforms to the canal cross-section, resists UV and weathering for years of exposed service, and deploys far faster than cast-in-place concrete. It is the lowest-cost way to turn a leaking channel into a tight conveyance.
Concrete blanket: a hard-wearing armoured surface
Where the canal carries high flow velocities, debris or foot and machinery traffic, a hardened surface protects the lining. Our concrete blanket is a cement-impregnated fabric that hydrates into a thin, durable concrete layer once wetted — an erosion- and abrasion-resistant canal lining that installs in a fraction of the time of poured concrete. It can armour the geomembrane or serve as a standalone channel surface on lower-seepage sections.
One supplier for the whole channel
Most canal projects combine an impermeable barrier with a protective surface: the geomembrane stops seepage, the concrete blanket takes the wear. SIGMA manufactures and exports both, so you source a coordinated canal lining package — geomembrane and concrete blanket — direct from the factory at manufacturer pricing, with one point of contact for the whole channel.
See it installed
Canal lining FAQ
How much water does canal lining save?
Unlined earthen canals can lose a substantial portion of their flow to seepage. An impermeable HDPE geomembrane liner stops that loss almost entirely, keeping the conveyed water in the channel. The exact saving depends on your soil and canal length, but seepage through a welded geomembrane is effectively eliminated.
Should I use geomembrane or a concrete blanket for my canal?
Use an HDPE geomembrane where stopping seepage is the priority and the surface sees little abrasion. Use a concrete blanket where high flow velocity, debris or traffic demand a hard, abrasion-resistant surface. Many canals combine both — geomembrane for the barrier, concrete blanket for armour. Tell us your flow and conditions and we will advise.
Is geomembrane canal lining faster than poured concrete?
Yes. A welded HDPE geomembrane is deployed in large rolls and seamed on site, while a concrete blanket simply needs wetting to cure. Both are far quicker to install than forming and pouring cast-in-place concrete, which shortens the time the canal is out of service.
Request a canal lining quote
Tell us your canal length, cross-section and whether you need a geomembrane, concrete blanket or both — we reply within one business day.