Technical Specifications

Vinyl/Foam Insulation

Absorption Layer
Enclosure Bulkhead
Wood, fiberglass, or metal.

Barrier Layer
Decoupler Layer
The combination of thebarrier and the decoupler layer covered by athin attractive vapor
barrier facing acts as asecond wall, in addition
to the machinery space
enclosure. This wall
reflects noise back into
the absorption layer.

Absorbs reverberating
sound in the machinery
space by filtering soundwaves through fineporous foam or fiberglass.

Film Facing
The attractive easy-toclean surface protects
the absorption material
from spills, mists, andvapors.

Above: SOUNDOWN
manufactures a wide range ofinsulation to meet specific needs.
Left: SOUNDOWN’S custom
cutting reduces labor, scrap andshipping costs. SOUNDOWN
technicians work with digital files,
drawings and complex patterns.

Vinyl Foam
Barrier Composite
SOUNDOWN’S
Vinyl/Foam composite
insulation is an effectivetreatment for airborne
noise that radiates fromengines, and othermachinery. The standard
composite consists of alayer of mass loaded
vinyl sandwiched
between two layers ofpolyether fire retardantfoam covered by a thin
attractive vapor barrier
facing. The composite isdesigned and manufactured specifically forattenuation of sounds
from machines such asengines, generators,pumps, and other marine
equipment which may
have significant base andmid-range frequency
components. Our construction centers theacoustic vinyl between
equal thicknesses offoam, front and back. Thisconfiguration optimizes
the mid and bass fre-quency sound isolation incomparison to othermaterials with only a thinfoam layer on the backside; soley optimized for“tinier” high-frequency
noise.
Vinyl/Foam composite
insulation fromSOUNDOWN is available
in a number of formats
for optimal sound attenuation within the available
space. Soundown is able
to tune this attenuation
by utilizing barrier material of 0.5 lb.,1 lb., 1.5 lbs.,
or 2 lbs. per square footin our composites. In
areas where hatch andbulkhead clearances do
not allow the use of
thicker composites wemay substitute heavier
barrier material so that
performance is not compromised. Likewise, inweight critical applications, lighter barriers may
be used in thicker
composites.

Barrier Foam Composites
Barrier.5 lb./ft2 1 lb./ft2 1.5 lb./ft2 2 lb./ft2
1/16”

1/8”

3/16”

1/4”

Decoupler Layer

Absorber Layer

Polyether Polyurethane
Flexible Foam-1.6 lb/ft3
220+pores/inch
1/2”-3” thickness available

Polyether Polyurethane
Flexible Foam 1.6lb/ft3
220 + pores/inch
1/2”-3” thickness available
1.5 mil Ripstop Mylar Vapor Barrier Facing

Typical Physical Properties
Thickness

Stiffness, MPA(Barrier)
ASTM 749
Tensile, PSI(Barrier)
ADSTM D 412

1/4” to 4”

Weights (per ft2)

.55 lbs. to 2.5 lbs.

Flammability, foam
UL 94 HF-1
MVSS 302

PASS
MEETS

Specific Gravity(Barrier)

1.80

ASTM D 798
Hardness(Barrier)Shore A 2
ASTM D 2240

90 Nominal

19.60

407

Elongation, %(Barrier)
ASTM D 412

120

Tear, lbs/1”(Barrier)
ASTM D 624

77

Temp Range, Fahrenheit(Composite)-40 to 255 degrees

Typical Acoustic Properties
Transmission loss of Composite by Weight
Per ASTM E90-90

Octave Band
Center Freq. Hz

Sound Absorption
Per ASTM C 423-84A

1 lb./ft2

1.5 lb./ft2

1” Foam, Mylar Face

125

1418.14250

1721.37500

2225.691k2832.61

2k

36

37.79

4k

4446.48

STC

2830

NRC.60* Transmission loss as published by SOUNDOWN and other manufacturers of composite insulation represent a test of the material alone without panel to it might be attached to in service.
17 Lime Street Suite 1Marblehead, MA 01945
1-800-359-1036
www.SOUNDOWN.com

3005 S.W. 2nd Ave. #102
Ft. Lauderdale, FL 33315
1-954-761-9188
sales@soundown.com