FIRM-FILL® 3310 Floor Underlayment

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An innovative new product that elevates gypsum concretes to an unprecedented level of rock-solid performance. FIRM-FILL® 3310 floor underlayment's fast-setting surface rapidly eliminates water allowing for accelerated drying time and unparalleled levels of strength and finish over wood and concrete subfloors in new construction and renovation projects.

FIRM-FILL® 3310 Floor Underlayment Recommended Applications

Over subfloors in:

Multi-Family
Custom Homes
Commercial Buildings
Hotels & Motels
Renovation Projects

FIRM-FILL® 3310 Floor Underlayment Features and Benefits

Premium strength, smooth surface over wood and concrete subfloors
Eliminates water rapidly for accelerated drying time
FIRM-FILL® 3310 Floor Underlayment can be poured before or after drywall
Exceptional compressive strengths from 2000 to 3300 psi
Delivers fire resistance and improved sound performance
FIRM-FILL® 3310 Floor Underlayment creates a smooth, crack-free surface
Expert application; installed only by trained, Licensed Applicators
Meets ASTM F2419, Standard Practice for the Installation of Thick Poured Gypsum Concrete Underlayments and the Preparation of the Surface to Receive Resilient Flooring

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Technical Data	Properties	ASTM

Weight	7.6 psf at 3/4"	C-472

Thickness	3/4" (19mm) (minimum over wood) to 3 1/2" (89mm); 1/2" (13mm) (minimum over concrete)

Compressive Strength	2000 - 3300 psi	C-472

Thermal Performance	K-value of 2.8 Btu; R-value of 0.36 ft2.h.°F/Btu	C-177-76

Fire Hazard Classification	Flamespread index 0; Fuel Contribution 0; Smoke Density 0	E-84

Patty Size	7 1/2" (approx. 191mm) plus or minus 1/2" (13mm) in diameter

Sand	1/8" (3mm) or less washed plaster or masonry sand	E-11

UL Listings	Listed in over 83 1, 2, 3, and 4-hour floor/ceiling assemblies

FIRM-FILL® 3310: Recommended Specifications | Project References

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