Sorbseal® is an Australian made hybrid Geosynthetic Clay Liner (hGCL) which works as a barrier to liquids in the same way as a regular GCL, but also helps trap a wide range of environmental contaminants, preventing them from entering the surrounding area.


Sorbseal has been modified with a very specific, high surface area powdered activated carbon and when used in composite lining designs, it can be an effective barrier for hundreds of years. Sorbseal is essentially a supercharged GCL with the ability to capture a lot more environmental contaminants than standard GCLs that are made with bentonite alone. The powdered activated carbon enables the environmental contaminants to be attracted to, and then trapped inside the pores of the powdered activated carbon.

Sorbseal is:

  • Reliable and safe-to-use as it is engineered to meet the EPA’s National Environmental Management Plan (NEMP) guidelines on maximum levels of PFOS, PFOA and PFHxS
  • Customisable to suit specific site chemistries for tailored solutions
  • For multiple uses across a range of applications including base liners, ponds and capping of contaminated materials
Sorbseal hGCL product image
Sorbseal hgcl call out

Using Sorbseal vs GCL

Initial studies on standard GCLs showed poor retention of a number of environmental contaminants and organic compounds. The primary difference between Sorbseal and a standard GCL is the addition of the powdered activated carbon. The bentonite is the same and the cover and carrier geotextiles are the same, so for those designing with standard GCLs, there’s no need to change traditional design methodologies. The hydraulic performance, mechanical behaviour and internal shear strength properties, all remain within expected standard GCL parameters.

Sorbseal hGCL body image