Deep Fill Underlayment

Low Density Fill™


Lightweight. Pours deep. Cap the next day.

  • Innovative, ultra-lightweight product
  • Ideal for deep fill applications and structural weight limitations
  • Up to 80% lighter than concrete
  • No thickness limitation
  • Fast drying—ready for topping the next day

Application
Multifamily and light commercial wood frame and concrete construction as part of a subfloor system.

Subfloor
Interior wood, concrete.

Technical Data

Installation DepthsNo thickness limitation
Compressive StrengthTypical range of 200 - 500 psi
(1.38 - 3.45 MPa)
Dry Density28-32 lbs/ft³ (449-513 kg/m³)
Packaging40 lb bag
Work Time10–30 min
Storage Temperature50 - 100 °F (10 - 38 °C)
Coverage1/2 in. thickness: 36 ft² (3.34 m²)
1 in. thickness: 18 ft² (1.67 m²)
2 in. thickness: 9 ft² (0.84 m²)
3 in. thickness: 6 ft² (0.56 m²)
Installation Temperature50 °F (10 °C) for at least 24 hours prior to installation
Trade TrafficFoot traffic 6–12 hours
Fire Performance (ASTM E84)Flame Spread – 0
Fuel Contribution – 0
Smoke Development – 0


maxxon logo

The Subfloor Experts

Find the right solution for your floors
Contact Us