Masterseal M 689 - A high elastic, ultra-fast curing, spray applied 100% polyurea membrane for use in waterproofing applications 


MasterSeal M 689 is a solvent free, two component waterproofing membrane. It is highly reactive and can only be applied by special two component hot spray equipment. 

Where is Masterseal M 689 ultra-fast curing polyurea membrane applied?

MasterSeal M 689 is used in a variety of waterproofing applications, especially where a high degree of chemical and mechanical resistance is required. 

This includes: 

  • Waste water treatment plants (urban and industrial), both in the inflow and outflow areas. 
  • Sewage effluent pipelines. 
  • Steel and concrete pipes. 
  • Secondary containment bunds in chemical and petrochemical industries. 
  • Additionally MasterSeal M 689 can be applied on: 
  • Flat and architectural roofs.
  • Horizontal and vertical substrates. 
  • Internal and external areas. 
  • Concrete, cementitious mortar or steel substrates. 
  • Reinforced concrete to protect it against carbonation, chloride induced corrosion or chemical attack in industrial environments. 

What are the advantages of a ultra-fast curing, spray applied 100% polyurea membrane?

  • Spray delivered and ultra-fast curing: enables easy application to form a monolithic waterproofing membrane on simple and complex surfaces. 
  • Rapid curing
  • Continuous membrane: monolithic – no laps, welds or seams  Excellent chemical resistance. 
  • Waterproof and resistant to standing water. 
  • Fully bonded to substrate: can be applied to a wide range of substrates with the appropriate primer. 
  • High water vapour permeability: low risk of blistering. 
  • High resistance to carbon dioxide diffusion: Protects concrete from rebar corrosion. 
  • High abrasion and impact resistance: Withstand mechanical traffic. 
  • High elasticity and crack bridging capability: o Remains elastic at low temperatures; Tg approx. – 45°C o High durability and protection with reduced cracking due to embrittlement 
  • Thermoset – does not soften at high temperatures

Product Information

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