Keep your roof cool and watertight!

MasterSeal 550, a flexible acrylic modified cementitious waterproofing membrane, applied as part of the Master Builders Solutions' standard roofing system, prevents heat island effect with its high Solar Reflectivity Index (SRI). New report available from DCL lab.


Trusted quality and durability – with a new twist in application

MasterSeal 550 offers the performance architects demand and the ease of use contractors require - fast, effective application.

  • Waterproof your roofs
  • Prevent heat island effect with high SRI - keep your roof cool
  • Excellent adhesion - bonds to porous and nonporous surfaces.
  • Flexible.
  • Seamless - conforms to irregular shapes, openings, flashings for a monolithic finish.
  • Hard wearing - suitable for light pedestrian traffic.
  • Breathable - whilst repelling water, allows substrate to breathe.
  • High resistance to carbonation and chloride attach - protecting your substrate from premature deterioration.
  • Can be applied to 24 hour-old concrete - giving immediate protection.

UV and weather protection for excellent roof waterproofing


Can be applied directly on top of polyurethane (PU) foam insulation to waterproof and prevent the foam from blistering in direct sun and degradation due to UV rays. Also ideal for application on roof screeds. 


Commercial roof waterproofing made simple


Two-component acrylic modified cementitious coating that requires only on-site mixing. Minimum 1mm thickness applied by roller or brush for fast and straightforward application across multiple substrates.


Trusted support you can count on

Behind every Master Builders Solutions innovation is a team of dedicated BASF building science experts.
Contact our sales team to get a quote on your next project: Maged El Sayed

Learn more about other application areas of MasterSeal 550

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