Hacker Industries' Firm-Fill 3310 gypsum concrete underlayment

Hacker Industries' Firm-Fill 3310, a gypsum concrete underlayment, and Hacker Sound Mat II, an environmentally friendly sound mat, are now included in 82 UL listings. The UL listings detail floor assemblies utilizing a Hacker floor underlayment as an integral component to achieve 1-, 2-, 3-, and 4-hour fire ratings.

Firm-Fill 3310 can be poured before or after drywall, delivering compressive strengths of as much as 3,300 psi. The Hacker Sound Mat II is engineered to provide optimum sound control and versatility for acoustical engineers, architects and developers.