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Treadstone® FR25

Fire-Rated Performance with High Flow
Our innovative Treadstone® FR25 gypsum concrete formulation adds the cementitious properties of high flow, high strength and abrasion resistance to the fire-resistive, non-shrinking, fast cure properties of gypsum underlayment.


This gypsum concrete formula is mixed onsite with locally sourced sand and water to provide a lightweight base that can host a wide variety of flooring. Treadstone® FR25 gypsum underlayment is approved for use over concrete, precast, wood, and Treadstone® Sound Attenuating Mats (thickness limitations apply).

  • Compressive strengths up to 3200psi
  • Fast Setting, light trade traffic in 1 hour, normal traffic 24 hrs.
  • Dense, smooth surface
  • Little to no surface prep, clean, prime, and pour.
  • Provides enhanced sound attenuation (STC & IIC) between floors
  • Reduces Carbon Footprint
  • UL Listed in over 100 designs
  • Installed by a technically trained network of Licensed Dealers
  • Multi-family Construction
    • Apartments
    • Hotels
    • Condominiums
  • Residential and Single Family
  • Commercial Office Space
  • Renovation of old wood frame or concrete structures


  • #10100  80lb bags
  • #10100-SS 2960 lbs Supersacks

Data Sheets