FIRM-FILL® 4010 floor underlayment is designed for thin capping of concrete in new construction or over damaged concrete in renovation projects. FIRM-FILL® 4010 floor underlayment’s high strength and superior bonding characteristics will provide concrete floors with new life and exceptional surface hardness, offering compressive strengths ranging from 4000 to 5200 psi.

Recommended For

Concrete Toppings & Self-Levelers

New concrete & cracked or damaged concrete.

Features & Benefits

  • FIRM-FILL® 4010 floor underlayment has exceptional compressive strengths from 4000 to 5200 psi
  • FIRM-FILL® 4010 floor underlayment is cost efficient
  • Creates a smooth, flat, crack-resistant surface
  • Rapid installation; up to 25,000 square feet installed per day
  • FIRM-FILL® 4010 floor underlayment requires no troweling
  • Unique bonding capabilities
  • Proven performance and durability
  • Quick drying; can be walked on in 90 minutes
  • Expert application; installed only by trained, Licensed Applicators

External Resources

Sweets ProductTAG

CAD Details

Product Resources

Key: Word   PDF   Web Page
Product Submittal
3-Part Specifications
Project References
Drying Conditions Flyer
Post-Pour Instructions
Guidelines for Finished Floor Coverings

Featured Application

SearStone-Calais Terrace and Lorraine Plaza in Cary, NC
Hilton Gardens Hotel of Indianapolis, IN
Technical Data Properties ASTM
Weight 7.6 lbs/ft2 at 3/4″ (19 mm) C472M
Thickness 3/4″ (19mm) (minimum over wood) to 3 1/2″ (89mm); 1/2″ (13mm) (minimum over concrete)
Compressive Strength 3000-3700 psi C472M
Thermal Performance K-value of 2.8Btu/ft2·h·°F; R-value of 0.36 ft2·h·°F/Btu C177
Fire Hazard Classification Flamespread index 0; Fuel Contribution 0; Smoke Density 0 E84, E136
Patty Size 8 1/2″ (approx. 216mm) plus or minus 1/2″ (13mm) in diameter
Sand 1/8″ (3mm) or less washed plaster or masonry sand E11
UL Listing Listed in over 100 1, 2, 3 and 4 hour floor/ceiling assemblies