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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 3500 to 5000 psi.

FIRM-FILL® 4010 Floor Underlayment Features and Benefits

·FIRM-FILL® 4010 Floor Underlayment has exceptional compressive strengths from 3500 to 5000 psi
·FIRM-FILL® 4010 Floor Underlayment is cost efficient
·Creates a smooth, flat, crack-resistant surface
·Rapid installation; up to 40,000 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

Technical Data	Properties	ASTM
Weight	7.2 psf at 3/4"	C-472
Thickness	Feather edge in transitions to 1-1/2" (26mm)
Compressive Strength	3500 to 5000 psi	C-472
Fire Hazard Classification	Flamespread index 0; Fuel Contribution 0; Smoke Density 0 E-84	E-84
Patty Size	7" 9203mm) plus or minus 1/2" (13mm) in diameter
Sand	1/8" (3mm) or less washed plaster , masonry sand, or silica sand	E-11