If you are sourcing a geosynthetic clay liner, the hard part is rarely understanding what a GCL liner does. The real headache is figuring out how the product is built, what standards matter, and whether the supplier can handle export, customization, and the back-and-forth that usually comes before a purchase order.

Longxiang New Materials sits in that practical buying lane. Its bentonite clay liner offering is aimed at containment and civil work where slope stability, load resistance, and straightforward factory supply matter more than marketing fluff.

Longxiang New Materials offers a needle-punched bentonite geosynthetic clay liner built as a blanket-like waterproof membrane.
Standard roll widths run from 1 m to 6 m, and standard roll length is 30 m.
The global GCL market is valued at USD 523.2 million in 2025, with Asia Pacific holding 35.83% share in 2025.

Product Overview of Longxiang GCL

Longxiang offers Needle-Punched Bentonite Geosynthetic Clay Liner as a blanket-like waterproof membrane. The construction uses graded natural sodium bentonite particles fixed between geotextile and plastic woven fabrics by needle-punching, which is the basic reason a clay liner can arrive in rolls instead of being built on site from compacted soil.

That design is meant for moderate to steep slopes and for moderate to high load applications. In plain terms, this is the kind of geosynthetic liner buyers look at for containment jobs where the liner has to stay put and keep its barrier function under real field stress.

Longxiang New Materials also comes with a broad product spread beyond GCL, including geomembranes, geotextiles, geogrids, geocells, drainage board, geocomposites, and erosion control materials through its product catalog. That wider catalog matters if one project needs a clay pond liner in one area, reinforcement in another, and drainage layers in the same shipment.

A GCL is basically a packaged hydraulic barrier.

The limitation here is simple: the product page gives the construction and intended use clearly, but it does not spell out every project-level engineering value a design team may ask for before signoff.

Technical Specifications and Material Composition

The structure is a composite with needle-punched, thermally reinforced layers. That matters because the needle-punching helps keep the bentonite mechanically held in place, while thermal reinforcement adds another layer of stability for installation and service conditions.

Here is the product format buyers can confirm right away:

Custom colors and custom lengths are also available, which is useful for projects trying to match site handling preferences or shipping constraints. For a buyer managing mixed containment materials, that flexibility can make a geosynthetic clay liner easier to fit into an existing install plan than a one-size-only roll program.

Some core engineering values are not posted publicly. Bentonite mass, hydraulic conductivity, and tensile strength need direct inquiry, so buyers should expect to ask for a datasheet or project-specific technical sheet before moving forward.

That missing public spec sheet is the main downside.

Standards Compliance and Testing Methods

For GCL work, standards are where generic brochure language stops and actual engineering starts. The ASTM tests most directly tied to a bentonite clay liner include ASTM D5890-25 for swell index of clay minerals, ASTM D5887/D5887M-22a for permeability index flux using a flexible wall permeameter, and ASTM D6768 for tensile strength of geosynthetic clay liners.

Each of those standards points to a different part of the performance story. Swell index speaks to how the bentonite reacts when hydrated, permeability testing gets at barrier behavior, and tensile testing matters for handling, installation stress, and how the liner deals with loading.

Buyers should ask Longxiang New Materials which of these tests are available on the exact grade being quoted, especially if the project is in waste containment, water retention, or slope work. That is particularly important because the public product page does not list numeric values for those properties, even though the test methods themselves are well established.

Three ASTM methods matter most here.

Applications and Performance in Environmental Protection

In landfill and environmental containment work, a GCL liner is not some fringe material. The U.S. Environmental Protection Agency municipal solid waste landfill guidance treats GCLs as hydraulic barriers comparable to compacted clay liners in municipal solid waste landfills, which is why they show up so often in conversations about barrier systems and groundwater protection.

The EPA’s guidance document on geosynthetic clay liners also frames composite liner systems around a flexible membrane over compacted clay to help prevent groundwater contamination. For engineers and buyers, that means a clay liner often works as part of a larger containment stack rather than as a standalone magic fix.

A useful reference point comes from Layfield’s BENTOGARD GCL technical sheet, which lists permeability at 5 × 10^-9 cm/sec. That figure is not a specification for Longxiang’s product, but it does give a real-world sense of the performance range buyers often expect when comparing GCL options for landfill cells, ponds, lagoons, canals, and other environmental barriers.

This is where a geosynthetic clay liner earns its keep.

For clay pond liner use, water containment, or anti-seepage applications, the practical question is rarely “does GCL belong here?” It is “what exact barrier level, roll format, slope condition, and cover system does this site need?” and that is where project-specific technical confirmation still matters.

Market Overview and Sourcing Advantages

The market is not tiny, and it is not standing still. Fortune Business Insights places the global GCL market at USD 523.2 million in 2025 and projects USD 810.9 million by 2034, with a 5.1% CAGR, while Asia Pacific holds 35.83% market share in 2025 through its published market outlook.

That regional share matters because Asia Pacific is where a lot of geosynthetics production and export activity is concentrated. For buyers, that often translates into wider product availability, factory-scale output, and more familiarity with container shipping for civil and environmental materials.

Longxiang New Materials positions itself on the practical side of that equation through its About Us page: cost-effective supply, factory-direct sales, broad product coverage, and export capability. Those are not small details when the job is bigger than one SKU and the order may include a geosynthetic liner, reinforcement materials, and drainage components in the same project package.

Here is the competitor picture in plain English, based on catalog overlap:

Longxiang’s edge is straightforward: broad enough product coverage to support multi-material jobs, plus a factory-direct export setup that fits buyers trying to keep sourcing tighter and costs more controlled. The trade-off is that some technical values still require a direct conversation instead of being fully posted upfront.

Ordering Information and Customization Options

For ordering, the basics are clear even before you send an RFQ. Standard roll sizes are available, and buyers can request custom colors and custom lengths if the project or shipping plan needs something different.

No public minimum order quantity is listed. If your job is small, staged, or tied to a trial install, you will need to contact Longxiang New Materials directly to find out what order size works.

That direct contact path is also how buyers move from browsing to actual technical consultation. For B2B purchases, especially where a bentonite clay liner has to align with slope, cover soil, chemical exposure, or installation sequencing, that is often a normal part of the process rather than a nuisance.

FAQ

What roll sizes can Longxiang New Materials supply for GCL?

Longxiang’s standard GCL roll widths run from 1 m to 6 m, and standard roll length is 30 m. Custom lengths are available, which can help match shipping plans or jobsite handling preferences.

Does Longxiang New Materials publish full GCL performance values online?

Not fully. Core figures such as bentonite mass, hydraulic conductivity, and tensile strength are not publicly listed on the product page, so you need to request them directly.

Can Longxiang New Materials handle export-oriented orders beyond GCL?

Yes. The company presents itself as a factory-direct exporter with broad product coverage, which matters for buyers sourcing multiple geosynthetic materials for one project.

What tests matter most for a geosynthetic clay liner?

For most buyers, the big three are swell index, permeability index flux, and tensile strength. Those are covered by ASTM D5890-25, ASTM D5887/D5887M-22a, and ASTM D6768.

Where is a clay liner usually used?

Common uses include landfill containment, pond or lagoon lining, canals, and other environmental barrier systems. A clay pond liner can also be part of a composite system with other lining materials depending on the site design.

Conclusion

If you are choosing a geosynthetic clay liner, start with the job, not the catalog. Check the slope, loading, barrier target, installation conditions, and whether you need only a clay liner or a full package with geotextiles, geomembranes, drainage, and reinforcement.

Longxiang New Materials makes the most sense for buyers who want a factory-direct source, export readiness, and a broad enough product line to keep a project under one roof. If your team needs every engineering value before the first inquiry, ask for the technical sheet early; if you are balancing cost, product range, and practical sourcing, Longxiang New Materials is a very credible place to start.