MasterSeal 599 - An elastomeric, cement-based waterproof coating for concrete and masonry

Formerly Thoroseal FX 122


MasterSeal 599 part 1 is a blend of Portland cements, selected silica, micro-fibres and modifying agents. When mixed to a slurry consistency with the acrylic polymer emulsion MasterSeal 599 part 2, it can be easily applied by brush or spray equipment. 

It cures to give an elastomeric flexible membrane. Fiber mesh is a fabric which can be used in strip form over joints and cracks or as reinforcement for the whole application.

Where is MasterSeal 599 applied?

  • For waterproofing water-retaining structures which may be subject to movement like water tanks, pools, reservoires, etc
  • As part of the MasterSeal basementwaterproofing system, in areas sensitive to movement, vibrations and slight settlement 
  • To protect concrete from water, carbonation and de-icing salts 
  • Suitable for internal and external use, against positive and negative water pressure 

What are the advantages of MasterSeal 599?

  • Retains flexible when submerged 
  • Good chemical resistance against soft water, domestic waste water, manure or other liquids moderately aggressive to mineral substrates
  • Freeze-thaw resistant 
  • Water vapour permeable
  • CO2 barrier
  • Crack bridging. 
  • UV stable 

Product Information

Technical Data Sheet


MasterSeal 599 MSDS Part A

pdf (44,47 Kb)

MasterSeal 599 MSDS Part B

pdf (43,98 Kb)

MasterSeal 599 TDS

pdf (214,86 Kb)