Here's an improvement on the AX-3682 felt backed material which has proved to be very popular over the years. This new heavier product, which is 4.5kg/m2 loaded with Barium mineral has a 4mm sheet of dense foam rubber bounded to the heavy sheet. The foam rubber has similar sound-deadening qualities compared to the old felt version but will not rot when damp, making it ideal to laid under carpets, between door trims and car doors, etc. The noise attenuation rating is now STC 27 whereas the previous material was STC 26+ (as measured by National Acoustic Labs, Sydney). It can be cut and mounted in similar fashion to the AX-3682 product. 

• Sheet size 675 x 330 x 6mm thick (approx).
• Sound transmission class: 27
• Humidity: Unaffected
• Stability: Indefinite
• Supplied in a polythene bag

Tested to Australian Standards:
• AS2755.1: 1985 ignitability
• AS1530.3: 1989 Early Fire Hazard
• AS1191: 1985 Airborne Noise Transmission
• AS8123: Quality Control Program
• AS1276: 1276 Sound Transmission Class

Frequency(Hz) TRANSMISSION LOSS (dB)
100  - 17.1         
125  - 15.7
160  - 17.0
200  - 17.5
250  - 17.8
315  - 19.8
400  - 21.0
500  - 22.0
630  - 23.1
800  - 24.5
1000  - 26.5
1250  - 28.2
1600  - 29.9
2000  - 31.6
2500  - 33.4
3150  - 35.3
4000  - 37.0
5000  - 38.6