The 3R839 is an aluminized polyurethane foam with very good sound absorption propriety. The aluminized film also prevents the penetration of vapor, dust and moisture. This product meets the North American safety requirements for flammability UL94 HF-1.


The 3R839 is ideal for any application of sound insulation. This product can be used where protection against grease, certain chemicals and abrasion is needed. It is ideal for engine compartments, gen-sets, pump housings and equipment enclosures.


Technical Data

Physical Properties
Temperature -73°C to 150°C (-100°F to 300°F)
Material Flexible open-cell polyurethane foam
Color Grey-Charcoal
Chemical resistance Acetic acid, hydrochloric acid, sodium hydroxide, trichloroethylene and hydrocarbon oils
Thickness 1/2" and 1"
Width 54"
Density (lbs/pi³) 2
Tensile strenght 17 psi
Absorption coefficients (ASTM C-384)(1 inch thick)
125Hz .23
250Hz .29
500Hz .93
1kHz .84
2kHz .75
4kHz .64
N.B. The information, details and values indicated are to the best of our knowledge. We recommend to conduct tests according to local conditions. The data is subject to some variations without notice.