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

Waterproofing Systems

Quality Waterproofing Systems For South Africa

Gast has been providing waterproofing systems for South Africa’s industry and commerce for more than 50 years.  Our head office and head of operations is based in Centurion. With more than half a century’s experience in this field we have gained a lot of knowledge and skill of our areas of expertise which we are happy to share with our customers and help them benefit their own businesses from our experience.

We understand the challenges faced by our customers who include engineers, construction companies and designers to protect their buildings and work areas from the effects of water. We believe that even though waterproofing systems and protection features as a somewhat minor element of the costs associated with the overall construction of the building, it is nonetheless a fundamentally crucial component in the success of any project and will have a direct impact on the building’s longevity.

Advanced Waterproofing Materials

It is for this reason that we apply international best practices to all our manufacturing processes, and that we apply constant quality control to all our products and processes. We are at the forefront of incorporating the latest technologies in the manufacturing and production process of our waterproofing materials.

We employ and train staff to be competent and experts in their fields, and our staff will work with you on every stage of the project. They will offer input from the design and development of the specific waterproofing systems to the inspection and installation of the systems. Our aim is to always achieve the most cost effective and durable waterproofing system for our customers. This contributes to the high quality we come to expect of all the products and services we market.

Protecting your building from the harmful effects of water is our Waterproofing department’s main concern, and working with other key industry players with who we have forged many allegiances over the years you can be assured of the best attentions of industry professionals at all time.

Some of the waterproofing system solutions that can be tailored around your project’s requirements feature the following:

  • Membrane and Acrylic systems: These systems are used primarily on tiled roofs and corrugated iron roofs. This three-coat system incorporates the polyester membrane is comes in either grey or red
  • Insulated waterproofing systems: This durable waterproofing system is specially formulated for zinc roofs without a pitch for water run-off. The entire surface area has polystyrene boards attached to it and these are covered with Masonite boards for extra insulation
  • Face brick sealant: This silicone water repellent is used mainly on plastered walls and outer face brick walls


All of our waterproofing systems and workmanship is guaranteed. We always strive to far exceed the expectations of our diverse customer base. We also specialise in civil engineering, construction and development, commodity brokerage, mining and hydrology and piping and pipelines. Our footprint can be seen in many of South Africa’s varied industries and commerce, and we are proud of our years of contributions to the South African commerce.