Geomembrane Liners and Covers

 

Geomembrane liners are impermeable membranes that are ideal for a variety of primary and secondary containment applications. They are available in a wide range of physical, mechanical and chemical resistance properties. They also offer superior containment and protection for solid waste and water containment, mining, and oil and gas containment applications. In addition, they play a key role in environmental remediation projects. They are a reliable and cost-effective solution to your containment needs.

HDPE – High Density Polyethylene

Features

Rigid tough geomembrane liner that is highly resistant to a wide range of chemicals due to its density.  Material also does not require soil cover.  It can be left in an exposed environment due to its high UV protection against degrading and low temperature brittleness.

Specifications

HDPE  typically delivers to the site in 22’ wide large rolls.  They are available in smooth or textured on either one or both sides to improve friction.  Available thicknesses range from 20 mils to 120 mils.  HDPE does not ship in custom panels due to its tendency to develop stress cracks when folded.

Installation

Certified technicians heat weld the rolls in the field, providing a high quality, test certified installation. If you require installation services, please call us at 609-971-8810.  We work with a network of certified geomembrane installers.

LLDPE – Linear Low Density Polyethylene

Features

LLDPE is a flexible geomembrane liner that conforms to any surface even in cold temperatures.  In addition, it has high elongation, tear resistance and burst strength properties.  Also contains carbon black and UV stabilizers to enhance longevity and outdoor performance.

Specifications

Available in 22’ wide roll goods in thicknesses of 20 mils to 120 mils.  They can also be smooth or textured on one or both sides to improve friction.  Due to its flexibility, LLDPE can be factory fabricated into large panels that are accordion folded and then rolled for economical deployment in the field.  In addition, the panels can be smooth or lightly textured on one or both sides.  Although weight limits the panel size, we can often fabricate a panel large enough to eliminate the need for field seams.  Thicknesses range from 6 mils to 40 mils for factory fabricated panels.

Installation

If the material requires field seaming, certified technicians heat-weld the rolls in the field.  This provides a high quality, test certified installation.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

PVC – Polyvinyl Chloride

Features

PVC geomembrane liners are extremely contractor friendly while offering many advantages over other liners.  Highly flexible to easily conform to sub-grade contours.  Excellent interface friction properties without being textured. Excellent puncture as well as abrasion resistance.  Superior chemical resistance to acids, alkalis, and alcohols. However, covering the material with soil is necessary to protect the liner from exposure to sunlight.  It also loses flexibility in cold weather applications.

Specifications

Available in a variety of formulations such as reinforced, potable water, fish grade and oil resistant. Factory fabrications into custom panels in thicknesses ranging from 20 mils to 60 mils are also available.

Installation

PVC can be self-installed in the field by using PVC glue or solvent.  However, critical applications may require heat welding in the field by certified technicians to ensure a high quality, test certified installation.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

DURA-SKRIM® String Reinforced Polyethylene- RPE

Features

DURA-SKRIM® string reinforced polyethylene geomembrane liners are produced by extrusion laminating multiple layers of high strength polyethylene together with tear resistant polyester scrim.  Scrim reinforcement also enhances strength and tear resistance.  Excellent longevity in outdoor applications due to UV inhibitors and carbon black content.
DURA-SKRIM® K36BT, K40BT and K45BT are unique reinforced geomembranes that can be manufactured with GeoGripTM texturing on one or both sides.  The GeoGripTM texture provides increased friction between various soil and geosynthetic layers, thus providing a solution for even the most challenging projects.

Specifications

Manufactured in custom factory welded large manageable panels that are accordion-folded and then rolled for economical deployment in the field.  Thicknesses range from 6 mils to 45 mils.  In addition, the material is available in smooth or textured on one or both sides to improve friction.  DURA-SKRIM® reinforced polyethylene is available in a variety of colors such as gray, black, white or clear.

Installation

Large panels may eliminate the need for field seaming.  However, if the material requires field seaming certified installation technicians can heat-weld the rolls in the field.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

Woven Coated Reinforced Polyethylene – RPE

Features

Woven coated reinforced polyethylene geomembrane liners are produced by weaving polyethylene tapes and then coating them on both sides with UV resistant polyethylene.  This process produces a lightweight geomembrane material that is highly resistant to punctures and tears.

Specifications

Available thicknesses range 8 mils to 30 mils.  Material is available in black, silver, or white.  Due to its light weight, woven coated reinforced polyethylene can also be factory fabricated into very large custom panels.  Accordion-folding and then rolling onto a core allows for easier handling and time-saving installation.

Installation

Large panels may eliminate the need for field seaming or sewing.  Most often taping is sufficient for temporary or non-critical applications.  However, if the material requires field seaming, it must be sewn or welded by a certified installation professional.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

Polypropylene – Reinforced RPP and Unreinforced PP

Features

Reinforced polypropylene is a flexible geomembrane liner that does not contain plasticizers that can leach out.  It is also approved for potable water applications.  In addition, the material is UV stable and does not require cover soil.

Specifications

Reinforced PP is available in thicknesses 35, 45, and 60 mil.  It can also be factory fabricated into panels up to 25,000 sq. ft.  Unreinforced PP is available in thicknesses of 30 and 40 mil and can also be factory fabricated into custom panels.

Installation

Installation in the field requires heat welding by a trained installer.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

Absolute Barrier™

Features

Absolute Barrier™ is a seven layer co-extruded geomembrane consisting of a flexible, linear low-density polyethylene (LLDPE) and an inner core of chemically resistant EVOH.  It is designed specifically as a barrier against radon, methane and VOCs.  High strength LLDPE also provides exceptional tear and impact resistance.  A robust stabilization package that exceeds the industry standard, it provides long-term protection against thermal oxidation as well as ultraviolet degradation in exposed applications.  In addition, a lightly textured surface provides enhanced grip for ease of installation and worker safety.

Specifications

Absolute Barrier ™ is available in a thickness of 25 mils as well as custom panels up to 30,000 sq. ft.  All panels are accordion-folded and then tightly rolled onto a heavy-duty core for ease of handling and time saving installation

Installation

Installation in the field requires hot air or wedge welding by a trained installer.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

Seaman XR-5™ – Ethylene Inter-Polymer Alloy

Features

Seaman XR-5™ is a flexible reinforced membrane that resists UV degradation, high temperatures, oils, fuels and most harsh chemicals.  It is also extremely durable and puncture-resistant.

Specifications

Available in 30 or 40 mil thicknesses and can be factory fabricated into panels up to 15,000 sq. ft.

Installation

Installation in the field requires either hot air or wedge welding by a trained installer.  If you require installation services, please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

PetroGard™

Features

PetroGard™ is a polyester reinforced flexible geomembrane liner.  Coating the high strength reinforcing fabric with a urethane aromatic resistance polymer gives this specialty liner its unique chemical resistance properties.  Its resistance to high temperatures and compatibility with fuels, oils, and other tough chemicals also makes it a good choice for secondary containment applications such as collapsible fabric tanks.

Specifications

The Petrogard™ liner is 30 mils thick.  The liner is available in rolled goods as well as factory fabricated large panels exceeding 10,000 square feet per panel.  Boots, sumps, and other liner penetrations can also be factory or field fabricated.  Petrogard™ is crated for protection during transport and delivery.  In addition, a specialty color of tan is available.

Installation

Installation in the field requires hot air or wedge welding by a trained installer.  If you require installation services please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

Vapor Block®

Features

VaporBlock® is a high performance under-slab vapor barrier that retards moisture migration through concrete slabs-on-grade. This product’s state-of-the-art polyethylene resins provide superior physical and performance properties.  Additionally, it far exceeds ASTM E-1745 (Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill Under Concrete Slabs) Class A, B and C requirements. High tensile strength, unequaled puncture resistance, ultra low moisture vapor permeability as well as resistance to decay make VaporBlock® one of the most effective under-slab vapor barriers on the market today!

Specifications

Available in 6, 10 and 15 mil thicknesses to best meet required performance specifications.  VaporBlock® 6 and 10 are available in 15’ wide rolls by 200’ long for ease of installation as well as maximum coverage.
VaporBlock® 15 is available in 12’ wide rolls by 200’ long.  For a superior gas and moisture barrier, VaporBlock Plus® is a 20 mil vapor retarder available in 10′ wide rolls by 150′ long.  In addition, other custom sizes are available depending upon size and volume requirements.  All rolls are folded and then rolled on heavy-duty cores for ease of handling and installation.

Installation

VaporBlock® is overlapped and then sealed with double- sided butyl seal tape.  Seams are then covered with single-sided vapor bond tape.  Factory fabricated pipe boots in various diameters are also available.

Geosynthetic Clay Liner – GCL

Features

GCL’s are composite liners that are manufactured by sandwiching thin layers of bentonite clay between two geotextiles.  They can also be bonded to a geomembrane to form a very thin, tight hydraulic layer.  Needle punching or stitching the bentonite between two geotextiles internally reinforces the bentonite while increasing the shear strength of the material.  GCL’s also function as a containment material by forming a hydraulic barrier layer to liquid movement.

Specifications

Geomembrane supported GCL’s are available with either HDPE or LDPE textured or smooth liner in thicknesses from 15 to 80 mils.  Rolls are 17.5’ wide with varying lengths.
Geotextile supported GCL’s are available with either a woven or non-woven or combination of both. Typical geotextile weights range from 3oz -6oz.  Roll Size is 15.5’ x 150’

Installation

An experienced, manufacturer-approved certified installer typically performs the installation.  The installer overlaps the GCL seams and then seals them with accessory bentonite.  Penetrations or repairs also require accessory bentonite.  If you require installation services please call us at 609-971-8810.  We work with a network of experienced and certified geomembrane installers.

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Disclaimer: These guidelines are for informational purposes only and are intended as illustration or general information only and are not intended as a guarantee or warranty. IWT assumes no responsibilities in connection with the use of this information.