Super SAM® 125 is a premium sound abatement membrane for surfaces that require impact and audible sound reduction without a sound rated ceiling assembly.


How It Works

Super SAM® 125  is a thin (approx.1/8" thick), self-adhering, sound deadening sheet membrane chemically formulated to reduce airborne (STC) and impact (IIC) sound transmission when used under stone, ceramic and porcelain tile, wood and other hard surface flooring. Super SAM® 125 is composed of modified elastomers, sound deadening resins and reinforced woven fibers and is designed for use in applications without a sound rated ceiling assembly. 


NAC TAC, NAC TAC II or NS97 Primers are necessary components of NAC sheet membrane systems.


Super SAM® 125​ has been extensively tested and certified for sound reduction on a variety hard surface substrates.


Bare 6" Concrete Slab - Tile Finished Floor 

IIC:  51

STC: 54

Delta IIC: 22


Bare 6" Concrete Slab - Engineered Wood Finished Floor

IIC: 51

STC: 52

Delta IIC: 23

Bare 8" Concrete Slab - Tile Finished Floor




6" Concrete Slab with 1/2" Backerboard - Tile Finished Floor



Delta IIC:23


Wood Joist Assembly - Tile Finished Floor

IIC: 56

STC: 61

For floors requiring crack isolation protection, Super SAM® 125 provides protection from in-plane, structural movement up to 3/8".  


For protection against Moisture Vapor Transmission (MVT), use Super SAM® 125 and the appropriate NAC primer to provide protection of 10#/1000SF/24HRS when used with NAC TAC or NS97 Primer or 7#/1000SF/24HRS when used with NAC TAC II Primer.



Super SAM® 125 is a perfect solution for applications requiring integrated sound abatement such as apartments, condominiums, multi-level hotels, high-rise office buildings, media rooms, children’s play areas, and other areas needing sound reduction.


Use Super SAM® 125 membrane OVER:


Concrete: Poured, pre-stressed and pre-cast concrete, concrete backerboard, mud beds, gypsum, lightweight concrete and patching compounds. 


Wood: Plywood, APA-rated sheathing, Sturd-I-Floor, hardwood, tongue and groove and OSB with standard face. (Gap between sheeting as required.) 


Other Substrates: Ceramic and porcelain tile, stone, terrazzo, metal, painted and sealed floors and floors damaged by dry shrinkage and structural movement. 


Use Super SAM® 125 UNDER:


Medium-bed mortar installations (ANSI A118.4) of ceramic, porcelain, stone, marble, slate, granite tile, pavers, brick. Hardwood, manufactured wood, and other finished floors; check with flooring manufacturer for more information. When installing wood over membrane, a solvent free or urethane glue/adhesive must be used. 


Also ideal for use with radiant heated floors and low voltage tile warming systems.



Super SAM® 125 is available in 3'x50' rolls (150 sq. ft.)


Super SAM® 125 Sound Control Membrane

Features and Benefits


• Sound abatement over 6” & 8” concrete slabs

   and a variety of wood substrates

• IIC 51, STC 54, ΔIIC 22 on a 6" concrete slab

• IIC 56, STC 61 on a wood joist system

• Protects against reflective cracking and


• Reduces live and dead load failures 

• Safely covers asbestos flooring and provides

   an effective  barrier against radon and mold

• Resists Moisture Vapor  Transmission (MVT)

   10#/1000SF/24HRS when used with NAC TAC

   or NS97 Primer or 7#/1000SF/24HRS when

   used with NAC TAC II  Primer 

• Eliminates need to cut tile to meet control/cold


• No need to remove old floors or recess new


• Self-bonding and self-healing formula 

• Tile can be installed the same day    

   as membrane 

• Works with radiant-heated floors and tile

   warming systems 



Phone: 330-644-3117/800-633-4622   Fax: 330-644-3557    Email:

© 2020 National Applied Construction Products, Inc.