Geomembrane coatings have been used extensively in the mining industry since the 1970s, due to the need to coat and protect evaporation reservoirs, dams and ponds.

Waste dams have been protected naturally by land for some time, but the use of geomembrane has seen a large increase in recent years, ensuring even greater quality for mining companies. Evaporation tanks are currently the largest applications where geomembranes are used.

The main function of this technology is waterproofing in the areas of mining, agriculture, irrigation, basic sanitation and others. In many cases, it can also replace traditional old procedures, such as compacted clay. Geomembrane is widely used because it is reliable and durable.

They are, basically, linings fabricated for the mining sector that, besides being functional, are a great decorative item that embellishes the landscape. They have the function of preventing water from directly contacting the site and causing problems. In the mining subject, for containment of tailings and no soil contamination; this must be handled by the mining company and must comply with standards required by the Ministry of Mines and Energy.


One of the most important steps for the well-functioning of the Geomembrane is the installation process. For example, one should take into account the temperature variation between day and night. During the day there may be heat, but at night the temperature may drop a lot in certain locations. Geomembrane material has been created to withstand this kind of adversity, which can expand and contract along with temperature, but even so, great care is taken in the installations in places with many folds or that sustain high stress.

PGG has extremely well trained professionals to ensure that all the specific requirements of each client and locality are respected.


Everywhere in the world, dams are built for several different purposes, but their general function is simply to store water. In countries where there is plenty of water, water is often used to generate electricity. In countries where it is not so abundant, its priority use is the consumption of the population and the irrigation of agricultural areas. In any case, losing any amount of this good can harm greatly the ones who depends on it and can cause problems, such as reducing productivity and threatening the support of life in that place.

Natural dams are already naturally protected against these dangers, but when dealing with concrete dams, the situation  is a bit different. In such cases, it is common to have cracks in the concrete that over time can be extremely damaging to the entire site.

Here at PGG we work with the best materials to ensure that our customers always receive the best service possible. The PVC membrane is one of the best materials for waterproofing dams and reservoirs of mining companies.

Installation process

Even though it is relatively simple but totally safe, the waterproofing of mining tanks has a delicate process that our professionals perform with mastery. In the following topics we explain in detail the whole process, so that the importance of our service is clear:

  • Cleaning the waterproofing area: this is the first step of installing the PVC blanket, or the Geomembrane. It is at this point that all waste and substrates are removed from the site so that they can not damage the material.
  • Application of geotextile layer: In order to ensure that the waterproofing material is protected in the best possible way, a layer of geotextile blanket is applied in this step, which is nothing other than textile materials that come directly into contact with the soil.
  • Application of the PVC Blanket: PVC membranes are the result of a fusion of various materials through a process known as calendering, in which the product is passed repeatedly between two metal tubes that guarantee to the material a greater flexibility, resistance to UV lights, bumps, aging and also rot. Because it is not a system exactly adhered to the place it is applied, it is much safer and more secure, because often the structure is subject to constant movements.

At the edges, the blanket is sealed through the galvanized steel installation covered with a thin PVC film. Over this, the polyurethane-based sealant is applied and then finally fixed in place. In places where hydrostatic pressure is constant, in addition to what has already been done, screws are also applied every 25 centimeters of the entire length of the rim.


Based on all of the above, the enormous advantages of hiring our waterproofing services in mining reservoirs are clear, but below we will list the main perceived advantages:

  • It is a completely malleable procedure and therefore can be applied in both underground and external structures;
  • The materials are 100% waterproof;
  • The welds of the intersections between the materials are made through hot air with a special equipment;
  • The great elasticity of the materials causes them to support up to 350% more pressure than other waterproofing methods;
  • Adaptability to the most diverse locations.