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Liners and Geocomposites for Improved Water Management

Geosynthetics like composites and liners play a critical role in stormwater management.

Although applications for liners and composites vary greatly, these engineered materials share an important function: separation. Separation of soil from water; waste from water; chemicals from soil; water from foundations, and so on.


Liners separate solids and liquids and retain liquids in order to prevent contamination. They are often used for landfills, stormwater management, mining and waste containment. A variety of high-performance materials are used to manufacture liners including:

  • GCL
  • EPDM
  • HDPE
  • PVC

Each material has unique qualities that are designed and proven to withstand the most extreme environmental demands.

Geosynthetic clay liner for hospital BMP in Manassas, VA


Geosynthetic Clay Liners combine geosynthetics and sodium bentonite clay to make an impermeable product.

There are two options for GCLs: Fabric Encased or Geomembrane Supported.

A Fabric Encased GCL combines a woven geotextile and sodium bentonite. The resulting product has the stabilization qualities of a woven geotextile and the permeability of clay.

The Geomembrane Supported GCL combines HDPE or LLDPE with sodium bentonite clay to produce a leak-resistant liner.


Ethylene Propylene Diene Monomer (EPDM) is very flexible and has great elongation which makes it the easiest material to handle. It is also UV, Ozone and Weather Resistant. EPDM is a great choice for decorative ponds because it is fish and pet friendly. You can also install this liner on stormwater and mining projects.


Linear Low Density Polyethylene liners (LLDPE) are flexible, have great elongation and are UV and chemical resistant. This product is an ideal choice for waste containment because the LLDPE is so durable. LLDPE is available in a smooth or textured finish.


High Density Polyethylene (HDPE) liners are durable and have superior UV and chemical resistance. Similar to LLDPE, HDPE is offered in a smooth or textured finish. HDPE is a cost-effective option for landfill lining, waste containment and stormwater ponds.

Liners are used in wet pond construction to separate soils


PVC is a trusted choice for separating water, waste, soil and chemicals because it is flexible, strong and impermeable. These liners are custom manufactured to meet site requirements which reduces the number seams and makes installation easier.

Use PVC liners for landfills, stormwater ponds, ditches, canals and mining projects.

PVC liners are available in multiple strengths including:

  • 10 Mil
  • 20 Mil
  • 30 Mil
  • 40 Mil
  • 50 Mil
  • 60 Mil


Geocomposites create a drainage layer that allows water to move in a small amount of space without failure or blockage. Most composites are a two-part system that includes a drainage core and a filter fabric.

Common applications for composites include:

  • Retaining walls
  • MSE walls
  • Reinforced slope applications
  • Strip drain/edge drain
  • Basement waterproofing
  • Athletic fields
  • Golf courses

CCM Drain

CCM Drain is our private label composite that manages subsurface water around building foundations. It is best suited for light commercial and residential applications.

The two-part composite has a light-duty dimpled drain board bonded to a nonwoven filter fabric. The nonwoven geotextile fabric retains soil, grout or sand so that water can pass through the drain board to drain vertically, rather than horizontally.

Use CCM Drain for basement foundations, retaining walls, planters and roof gardens.

CCM415 4′ x 50′
CCM Drain Spec

SWD Strip Drain

SWD is a high-profile strip drain for commercial edge drain applications.

This geocomposite includes a heavy-duty dimpled drain board bonded to a nonwoven geotextile fabric. Similar to CCM Drain, the nonwoven geotextile fabric retains soil backfill so that water can flow freely through the drain board.

Use SWD for highway edge drain to channel water away from the roadway’s shoulders. It is also installed for foundations and retaining walls.

SWD-66″ x 165′
SWD-1212″ x 165′
SWD-1818″ x 165′
SWD-2424″ x 165′
SWD-3636″ x 165′

Compatible fittings are available for 6″ – 36″ Strip Drain. Accessories include:

  • End outlet
  • End cap
  • Side outlet
  • Splice
  • Corner
  • Step down
  • T connector

Geonet geocomposite


A Geonet is a three dimensional bi-planar net that combines a high-density polyethylene extruded mesh and a nonwoven geotextile fabric. This geocomposite drainage core offers lateral drainage of liquids and gases. Geonets are specified for landfill, stormwater ponds and mining applications.

Geonets are manufactured in a range of thickness from 4mm to 10mm and and bonded with nonwoven geotextiles ranging from 120 gsm to 680 gsm.

Transnet 160
Transnet 220
Transnet 250
Transnet 270
Transnet 300
Transnet 330
Transnet 350

Explore related products

Nonwoven Geotextiles


Woven Geotextiles

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