03 June 2022

By Eamonn Ryan

MasterSeal 7000 CR consists of two components: the primer MasterSeal P 770 and the membrane MasterSeal M 790, both based on its technology Xolutec – a new and unique technology for durable solutions. The two MasterSeal 7000 CR colours – red and grey – allow safe application even in environments with poor visibility.

MasterSeal 7000 CR has been tested against Biogenic Sulfuric Acid in accelerated weathering champers for 6-month period in Fraunhofer Institute, this is comparable of a five-year period  the real sewer system. The results of the test show no significant changes on the properties of MasterSeal 7000 CR. Xolutec was especially developed to solve the problems of challenging technical environments.

Xolutec is an innovative and smart way of combining complementary chemistries. Mixed on site, the material forms a cross-linked interpenetrating network, enhancing the overall product properties. Furthermore, Xolutec combines diverse benefits, such as chemical resistance with effective crack-bridging.

  • The all-in-one solution: By controlling the cross-linking density, the properties of Xolutec can be adjusted to ideally suit the product performance required. Xolutec’s versatility and capacity to formulate a wide variety of solutions for specific requirements create a new dimension in material technology for the construction industry.
  • Fast and easy application: The new technology is low in volatile organic components and consequently is quick and easy to apply both by rolling or spray. Due to its insensitivity to moisture the technology tolerates a wide variety of site conditions, greatly expanding the application window while reducing the potential for delays and failures.

Thanks to its excellent curing properties even at low temperatures, Xolutec allows a fast return to service and guarantees the efficient, safe and continuous operation of wastewater treatment infrastructures. Long maintenance cycles and lower life cycle costs significantly reduce the total cost of ownership.

Jacques Marais, Waterproofing Segment Manager at Master Builders Solutions explains that each step in wastewater treatment requires a specific approach. “Both the waterproofing, repair, or protection product used and the design of the solution must be adapted to the specific chemical and mechanical aggressiveness of the incoming water. The required purity level of the treated water generated also influences the chosen solution.”


MasterSeal 7000 CR avloppsreningsverk

The concrete infrastructure of wastewater treatment systems is subject to complex physical and chemical corrosion processes. Uncoated concrete is particularly susceptible to so called biogenic sulfuric acid corrosion.

The process of biogenic sulfuric acid corrosion is caused by bacteria from the genus Thiobacillus, which metabolizes hydrogen sulfide (H2S) and liberates sulfuric acid. Anaerobic (oxygen-free) conditions, such as in sewers where there is minimal airflow, turbulence, or waterflow, allow the bacteria to thrive.

BSA corrosion is a result of the second process, in which H2S is released into the headspace. The accumulation of H2S in the headspace varies with airflow, but even low concentrations are sufficient to promote Thiobacillus colonisation. This chemical attack can lead to serious structural concrete damage.

With 27 years in waterproofing and flooring industries, Marais, delivers solutions from a wide range of products – cementitious, bitumen and synthetic waterproofing.

“This covers whether you want to keep water in or out. Our focus at the moment is in the raw sewage market, which eats through cement and penetrates the reinforcing. Our product completely cancels out that process. Ours is an easy to apply brush on product, and as such is a great improvement on anything that has previously been available.”

Marais works with many professional architects in advising them on their upcoming projects, whether commercial, industrial or residential, whether new developments or revamps. “The products we have are extremely good quality that give our clients confidence in their projects, as it takes away the guesswork as to whether or not a product will work, but it is not any just person who can buy our products – we work only with preferred appliers who’ve done the relevant training and we’ve witnessed the quality of their workmanship.

“We stand by them every step of the way, helping them build their business through our products. Service is primarily what differentiates us from our competitors by relationship building.”

R&D is a big component of Master Solutions’ business, and the company’s Dubai office has the capability to develop and manufacture bespoke solutions for companies. “A key component of that process is testing any new product before it gets introduced to the market. A huge focus of our R&D is reducing the carbon emissions of our product range. This is a key factor for our architect clients who are themselves required to give a ‘green’ rating on their buildings,” concludes Marais.

Read the latest issue

Latest Issue