Product Detail Sheet:

Mainstay ML-72P Sprayable Microsilica Mortar (46 KB, requires Adobe Reader)

Mortar Type:

Polymer modified portland cement based mortar


Normally stocked in 65 pound bags; special packaging available

Applied Thickness:

Mainstay ML-72F Mortar may be applied from 1/8" to 1/2" depending on the condition of the substrate. Substrates requiring restoration thicknesses greater than 1/2" would typically be repaired using Mainstay ML-72 Sprayable Microsilica Restoration Mortar.


Approximately 30 square feet per bag at 1/4"


Mix 1.3 gallons of water per 65 pound bag

Test Data:

  • Compressive Strength per ASTM C-109: 10,000 psi at 28 days
  • Flexural Strength per ASTM C-293: 1,505 psi at 28 days
  • Tensile Strength per ASTM C-496: 910 psi at 28 days
  • Shrinkage per ASTM C-596: 0% at 28 days at 90% relative humidity
  • Bond Strength per ASTM C-882: 3,440 psi at 28 days

Suitable Applications:

  • Filling bugholes and resurfacing concrete that has been roughened by aggressive surface preparation in pools and exhibits in zoos and aquariums
  • Cementitious underlayment ideal for the application of an epoxy topcoat