MasterSeal 590 - A fast setting mortar to plug active water leaks in concrete and masonry

Formerly  Thoro Waterplug


MasterSeal 590 is a blend of hydraulic cements, well graded sands and additives supplied in dry powder form. It requires only the addition of clean water to produce a ready-touse, ultra-rapid setting, plugging mortar.

Where is MasterSeal 590 applied?

  • Stops active water or seepage under pressure through joints, cracks and holes in concrete or masonry, where a normal mortar would be washed away and resin would not bond
  • For sealing cracks and construction joints in reservoirs and other water-retaining structures
  • For instant sewer connections
  • For rapid anchoring of bolts, conduits, pipes, railings, sanitary equipment, etc. 
  • Joint filling, pointing between concrete segments in concrete and brick tunnels, sewage systems, pipes and mines

What are the advantages of MasterSeal 590?

  • Durable
  • Chloride-free, will not promote corrosion of reinforcement
  • Expands as it sets to ensure a permanent watertight seal
  • Mechanical characteristics similar to concrete
  • Cost effective 
  • Ultra-rapid setting for instant leak plugging
  • Blocks water, no injection equipment required
  • Easy to apply 
  • Only to be mixed with water
  • Environmentally friendly
  • Cement based, contains no toxic elements

Product Information

Technical Data Sheet

Info & price request

Midrand: +27112032405 Westonaria: +27117541343
Coastal Regions: +27112032405


MasterSeal 590 TDS

pdf (68,10 Kb)
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