MasterSeal M 640 – A flexible and elastic single component polyurethane waterproofing membrane

Formerly: Masterseal 640 Membrane

How does MasterSeal M 640 work?

MasterSeal M 640 is a single component, polyurethane based, elastomeric coating for roof waterproofing.

What are MasterSeal M 640 typical applications?

MasterSeal M 640 is applicable for outdoor use and can be applied on concrete and cement mortars. It is recommended for waterproofing roofs, balconies and terraces.

What are MasterSeal M 640 main benefits?

MasterSeal M 640 main features and benefits are:

  • High elasticity and flexibility
  • Excellent adhesion to concrete and mortar. Fully bonded system.
  • Once hardened it is impermeable to water and carbon dioxide.
  • Tar free
  • Easy to apply.
  • Single component and low viscosity.
  • Excellent crack bridging capacity even at low temperatures.
  • Monolithic – no laps, welds or seams.
  • High water vapour permeability - low risk of blistering.
  • Excellent mechanical properties.
  • Resistant to standing water.
  • Can be re-coated after only a few hours.

Product information

Technical Data Sheet


Central Region
+966 11 2790971
Western Region
+966 12 6394799
+966 12 6395702
Eastern Region
+966 13 8084896
South Region
+966 17 2748255
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