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Mine Block Mortar

Polyurethane Mine Stopping Adhesive

Mine Block Mortar is a superior, single component, polyurethane mine ventilation stopping adhesive.  It quickly provides a strong air sealing bond between concrete blocks used in underground coal mine ventilation stoppings.  Mine Block Mortar bonds standard block, replacing traditional mortar and strength-enhancing surface skim coating found in most underground coal mines.  It can also be used in underground, non-gassy metal and non-metal mines.  It is fire retardant and meets air quality standards when used according to manufacturer's recommendations. Mine Block Mortar can also be used to repair and seal mortar joints.

Features & Benefits

  • Lightweight cylinders contain 20 lbs. of adhesive
    • Enough material for multiple stoppings
    • Reduces risk of strain injuries from heavy lifting
  • Cures and adheres to block within 30 minutes
  • Bond strength exceeds cement mortar (ASTM C1072)
  • Retains full function after 1 hour fire test (ASTM E119)
  • Not affected by moisture or temperature during curing
  • 10 ft. hose and applicator
  • Eliminates the need for parge coating
  • No tools or mixing required
  • ASTM E84 Class A Fire Resistance
    • Flame Spread: 10
    • Smoke Developed: 10

Typical Uses

  • Underground coal mine ventilation control adhesive
  • Standard 6" wide or larger hollow core or solid concrete block: Suitability Number MSHA-ST25/0
  • 6" x 12" x 24" or larger ACC lightweight block:  Suitability Number MSHA-ST30/0

Technical Information

Mine Block Mortar - Safety Data Sheet (PDF)
Mine Block Mortar - Technical Data Sheet (PDF)


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