• HQ Call: +27 (0)12 660 1616
  • Email: info@gast.co.za
  • GAST Liberty Park 96, Achilles Str. Zwavelpoort, Pretoria, South Africa


Geosynthetic Solutions For Various Applications

We are the market leader in South Africa for geosynthetic solutions aimed at local industry. Operating since 1961, we are proud of our milestones and achievements, having serviced African and Middle East markets in more than 15 different countries, setting the benchmark for cutting edge technology and quality. No other company comes close to our offering of both geosynthetic products and installation services. Value for money and service excellence is guaranteed when making use of our services.

We offer the quality and reassurance that come with experience, innovation and a financially sound and stable company. Our service offering is complete and we offer support for any geosynthetic requirement. Upon request we will provide you with detailed drawings combined with exhaustive technical and estimating support to afford you the most economical of design and constructible configuration geared to meet the requirements of each unique project.

Some of the applications we supply include the following:

  • Aquaculture
  • Bulk Oil Storage
  • Canal Linings
  • Environmental
  • Hazardous Waste
  • Landfill applications
  • Leach Pads
  • Reservoirs


Products available for geosynthetic range from:

  • HDPE (Geomembranes)
  • VFPE (Geomembranes)
  • LLDPE (Geomembranes)
  • Geonets
  • Geogrids
  • Polylock


The above lists are certainly not exhaustive. As a further guarantee on the quality you will receive from us, we operate an assurance quality control system which conforms to the principles of ISO 9001. This system governs each aspect of the operation; more specifically it focuses on the following aspects:

  • Design & Contract overview
  • Quality of Materials
  • Quality of Workmanship
  • Traceability
  • Inspection & Testing
  • Document Control


Our Industrial Fabrics and Membranes services provide cutting edge solutions for soil separation, confinement and reinforcement. Soil erosion can quickly become a serious and expensive problem, negatively affecting water sources, wildlife and landscaping. We have a range of permanent and temporary erosion control solutions aimed at commercial and industrial applications.

We pride ourselves on our all encompassing approach to offering cost effective and practical solutions to our customers’ needs. Other civil engineering solutions include Bulk Water supply for irrigation as well as portable use. We have the means to offer cost effective Bulk Water supply solutions, ranging from dams and reservoirs. These remain the most viable and dependable water management resources. Canals also provide fast and affordable delivery of water where the surrounding terrain has gentile gradients. We design and install canals that can accommodate a velocity of up to 2 m/s.

The geosynthetic solutions offered to local and regional industry have been tailored to suit the specific needs of African and Middle Eastern countries.  Our complete spectrum of services is aimed at meeting the requirements of both the civil and construction industries.

With more than 50 years industry experience behind us, we have forged ourselves a well deserved industry reputation of quality products and excellent workmanship. A further testament to this is the fact that we have successfully completed more than 9150 projects during the previous millennium, and enjoy United Nations and World Bank accreditation. Contact Gast for your geosynthetic requirements.