Soudafoam Flex is a premium grade, flexible, one component and moisture curing PU-foam. Its elastic properties make it the perfect product to be used in applications where limited movement may occur. The product is low expanding, offers the same extreme temperature ranges as Soudafoam All Season and is sealed with a new-generation plastic adaptor head which makes it possible to store the product in all positions and giving it an extended shelf life with no loss of yield.
Available in 24 oz. (Gun)

Technical Data:
Base |
Polyurethane |
Consistency |
Stable Foam,thixotropic |
Curing System |
Moisture-cure |
Skin Formation |
Ca. 6 minutes (20°C/65% R.H.) |
Drying Time |
Dust-free after 20 – 25 minutes at 20°C |
Curing Rate |
Ca 1 hour for a 1.2” bead |
Foam Yield |
24 oz yields 6.6 gallon of cured foam |
Yield (ASTM C-1536) (for 24 oz) |
4005 linear feet (1221m) @ ¼” (6.4 mm) dia. bead |
Shrink |
Very limited |
Post Expansion |
Very limited |
Cellular Structure |
Fine cellular structure |
Specific Gravity |
Ca. 25kg/m³ (extruded, fully cured) |
Temperature Resistance |
-40°F to +194°F when cured |
Color |
Champagne |
Fire Class |
B2 (DIN4102 part2) |
Air penetration (DIN 18542) |
a<0.1m³/[h.m.(daPa)2/3] |
Vapour permeability (DIN EN ISO 12572) |
Water diffusion resistance µ = 20 |
Water Absorption |
1% Vol. |
Acoustic Rating (EN ISO 717-1) |
RST,W (c;ctr) = 60dB (-1; -4) |
Permanent deformation at pressure (ISO 1856) – 50% compression 22h 1 day recovery |
Ca 6% |
Insulation Factor (DIN52612) |
35mW/meter Kelvin |
Shear Strength (ASTM C-273) |
3.6 psi |
Elastic Recovery (ISO 1856) |
Until 92% (75% compressed) |
Compressive Strength (ASTM D-1621) |
2.2 psi |
Change of Volume (DIN EN ISO 10563) |
<5% |
(Values may change slightly due temperature, humidity, surface and way of application)
Product:
SoudaFoam Flex is a one-component, selfexpanding, ready to use polyurethane foam. It is fitted with a plastic adaptor head for use with a foam applicator gun. It contains CFC-free propellants, which are completely harmless to the ozone layer. The product has a minimal expansion after application (less than 50%) and is therefore very economical to use. The foam is very elastic and has a very high Acoustic Rating and Thermal Insulation value.
Characteristics:
-
Very high elastic recovery
-
Copes with extreme mechanical movement
without cracking -
Excellent adhesion on most substrates (except
Teflon, PE and PP) -
High thermal and acoustical insulation
performance -
Very good filling capacities
-
Excellent stability (no shrink or post expansion)
-
Very precise application due to the foam
applicator gun system -
Low expansion
-
Good compressibility
Application:
Shake the aerosol can for at least 20 seconds. Fit
the gun on the adapter. Moisten surfaces with a
water sprayer prior to application to have the
optimal performance to elasticity, noise
reduction and cellular structure . Fill joints and
cavities for 65 %, as the foam will continue to
expand slightly.
Repeat shaking regularly during application. If you
have to work in layers repeat moistening after each
layer. Fresh foam can be removed using Soudal
Foamcleaner or acetone. Cured foam can only be
removed mechanically. Working temperature 41°F
to 95°F. (68°F-77°F recommended) Due to the
flexibility of the product, it is recommended to use a
sharp knife to cut the foam.
Health and Safety Recommendation:
Apply the usual industrial hygiene.
Wear gloves and safety goggles.
never burn away PU-foam
Consult the label for more information.
Application Areas:
Good applicability in expanding joints.
Vibrating constructions
Use as fixing foam while minimizing noise
transmission
Impact and shock damping
Sealing of window- and doorframes
Filling of cavities
Sealing of all openings in roof constructions
Creation of a soundproof screen
Connecting of insulation materials and roof
constructions
Application of a soundproofing layer on motors
Improving thermal isolation in cooling/heating
systems
Shelf Life:
18 months in unopened packaging in a cool
and dry storage place at temperatures between
+5°C and +25°.
Always store can with the valve pointed
upwards
Packaging
Aerosol can 24 oz with gun adaptor.
Remarks:
-
Work in layers and repeat moistening after
each layer -
cured PU foam must be protected from UVradiation
by painting or applying a top layer of
sealant (silicone, MS Polymer, acrylic and PUsealant) -
Respect the cleaning and storage instructions
enclosed in the Foam Gun box.
Norms and Certificates:
Fire rating B2 ( DIN 4102-1 ) Prüfzeugnis PSAC
02/III-164 (MFPA)
Heat transmission rating ( DIN 52612) PB
070598.1 Hu ( MPA Bau Hannover)
Acoustic Insulation ( EN ISO 717-1) PB
16733428 (IFT Rosenheim)
Vapour penetration ( DIN EN ISO 12572 ) PB
50933428 ( IFT)
Air Penetration (DIN 18452) PB 10533428 (IFT
Rosenheim)
*For the most up to date version click to download the Technical Data Sheet