GeoDrain LD - Leak Detection & Liner Drainage Sheets

GeoDrain LD leak detection and liner drainage sheets are high-compressive cuspated drainage cores designed for use within geomembrane lining systems. Installed between primary and secondary geomembranes, they provide a continuous in-plane drainage layer that detects and transmits leachate flow under high overburden loads - confirming the integrity of the primary liner and protecting the secondary liner from hydraulic pressure buildup.

The cuspated core geometry provides a smooth interface against geomembranes on both faces while maintaining high in-plane flow capacity under load. This smooth contact protects the geomembrane surface from stress concentration and puncture that would occur with a conventional drainage aggregate layer. The cuspated structure retains meaningful flow capacity at loads up to 500 kPa, making the range suitable for deep landfill cells, high-load containment bunds and tailings storage facilities.

The GeoDrain LD range covers four compressive strength grades. The LD 420 at 700 kN/m2 and LD 500 at 1000 kN/m2 address standard and intermediate landfill cell specifications. The LD 700 at 1300 kN/m2 is the highest compressive strength product in the range, designed for deep cells and high-load containment where long-term creep resistance under sustained loading is a design requirement - the LD 700 retains 87.39% of its thickness at 500 kPa over a 100-year design life. The GeoDrain LD 6 is a 6mm HDPE cuspated core for applications requiring a thinner profile and is also available with a bonded PP geotextile on request.

All GeoDrain LD products are manufactured from polyolefin mix (LD 420, LD 500, LD 700) or HDPE (LD 6) and carry UV stabilisation and high oxidative resistance. The LD 500 and LD 700 carry High Pressure OIT values above 600 minutes, confirming long-term antioxidant retention under aggressive leachate conditions. All products must be covered within 28 days of installation.

GeoDrain LD sheets are locally stocked in South Africa and supplied across sub-Saharan Africa. Full technical support is available for lining system design, specification review and installation guidance.