​MasterSeal 7000 CR

The Solution for Extreme Wastewater Challenges


The concrete infrastructure of wastewater treatment systems is subject to complex physical and chemical attacks. MasterSeal 7000 CR is specially designed to address these challenges.

Unique Combination of Application and Performance Properties 

MasterSeal 7000 CR's high resistance to abrasion and biogenic sulfuric acid corrosion are ideal to withstand the severe conditions that occur in pretreatment and aeration tanks, digesters, or sewers. Its dynamic and static crack-bridging abilities protect concrete from cracks thus prolonging the structure's life cycle.

  Proven durability


 Product properties

 Fast and easy application by rolling or spray at temperatures from 5oC to 35oC

 Excellent curing properties, which reduce downtime

 Specific chemical resistance, including high concentrations of biogenic sulfuric acid

 Crack-bridging for gaps of up to 0.7 mm

 Maximum moisture tolerance, including application on humid substrates

Fast and Easy application – even on humid substrates

The easy application of MasterSeal 7000 CR by spray or roller, as well as its compatibility with damp substrates, suit the conditions of wastewater facilities particularly well. Downtime – which is always critical when stopping a wastewater process – is also reduced because of its fast-curing properties that allow contact with water only 24 hours after application at 20oC.

Spray Applied 

Fast and easy application by spraying at temperatures from 5oC to 35oC

Video: Spray application of MasterSeal 7000 CR

Hand Applied 

Fast and easy application by rolling at temperatures from 5oC to 35oC

Video: Hand application of MasterSeal 7000 CR

Challenges in wastewater Treatment

1. Strong waterflow and water containing solid particles > Abrasion

2. Concrete shrinkage and steel reinforcement corrosion > Cracks, leakage and structural damage

3. Presence of chemicals and conditions for Biogenic Sulfuric Acid > Chemical attack

Increase the life cycle of the structures and reducing maintenance and repair

Fields of application

  • Urban and industrial wastewater treatment both in inflow and outflow areas
  • Biogas plants
  • Secondary containment in industry
  • Sewage effluent pipelines

Thickener tank at a wastewater treatment plant in Poznan, Poland

Secondary containment area at a wastewater treatment plant in Málaga, Spain

Chemical protection of manholes in Italy

Chemical protection of gunwales in Italy

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MasterSeal 7000CR Brochure

pdf (10.85 Mb)