Amorphus, apolar, visco-elastic, semi-solid, polyolefin mastic.

Surface Preparation

  • Hand Tool Cleaning


A visco-elastic self-supporting mastic that is a part of the Viscotaq coating system. Providing exceptional corrosion prevention and waterproofing while providing a smooth profile for the application of Viscotaq tapes and systems.

ViscoMastic XHT is available for high temperatures.


  • Impermeable to moisture and gases
  • Immediate adhesion to substrate / permanent wetting characteristics
  • No primer needed
  • Easy to apply, no mixing or messy clean-up
  • Minimal surface preparation required (SP2-wire brush)
  • Self-healing characteristics
  • Inert material, no deterioration over time
  • Resistant to aggressive soil conditions such as water, acid, salts, or soil organics
  • Quick long-term protective coating, ready for immediate service
  • Contains no solvents, no carcinogens, non-toxic, non-flammable
  • Contains fire retardant materials and self-extinguishing
  • UV resistant and never cracks or becomes brittle
  • Flexible, pliable, conforms to irregular shapes easily
  • Freeze / thaw resistant
  • Thermal resistance -45°F to 158°F (-45°C to 70°C)
  • Thermal resistance -45°F to 257°F (-45°C to 125°C) for XHT version
  • Ability to fill voids and anomalies of substrate
  • Meets NACE 0109:2019 and ISO 21809-3:2016
  • Available in high temperature grade
Technical Data Sheet


ViscoMastic XHT


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