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  • Extra Firm Cellular Silicone IOTA-HT-840

    Extra Firm Cellular Silicone IOTA-HT-840

    IOTA-HT-820 is an extra-firm grade silicone foam that offers improved durability and sealing. It is used to seal and protect various outdoor communication, lighting, and electronic enclosures from small dust particles, wind driven rain, and fire. It offers a higher tear and tensile strength than our lighter grade foams. IOTA Silicones are available in various

    thicknesses and manufactured in roll form to allow fabricators to easily convert the material to the proper dimensions.

     

    Features and Benefits

    Excellent memory and low stress relaxation reduces maintenance costs associated with gasket failures due to compression set and softening.

    Resistance  to  ultraviolet  light,  ozone,  extreme temperatures, and flame enables consistent performance in all environments.

    Compact cell structure provides improved sealing performance.

    Available through distribution sites throughout North America, Europe, and Asia.

     

    Applications

    Environmental seals to protect against penetration of dust, moisture, air, or light within outdoor enclosures such as lighting fixtures, HVAC units, and electronic cabinets.

    Enclosures requiring a more durable, high closure force gasket.

    Press pads requiring greater conformability and even pressure distribution at high temperatures.

     

    Installation

    Available with a pressure-sensitive adhesive on one or two sides to allow easy application to a variety of surfaces.

    IOTA-HT-840

    Property

    Test Method

    Typical Value

    PHYSICAL

    Color 

     

    Gray

    Thickness,  mm

    (inches)

     

    0.80 – 3.18 (0.031 – 0.25)

    Standard Width, mm (inches)

     

    449 (28)

    Density, kg/m3 (lb./ft3)

    ASTM D 1056 

    432 (27)

    Compression Force

    Deflection, kPa (psi)

    Force measured @

    25% Deflection

    ASTM D 1056

    151.7

    (22)

    Compression Set,

    % max.

    ASTM D 1056

    Test D @ 70

    (158)

    ASTM D 1056

    Test D @ 100

    (212)

     

    < 1

     

    < 5

    Tensile Strength, kPa (psi)

    ASTM D 412 

    414 (60)

    Elongation, %

    ASTM D 412 

    55

    FLAMMABILITY & OUTGASSING

    Flame Resistance

    UL 94

    Listed V-0 and HF-1

    Flame Spread Index (Ls) 

    ASTM E 162

    < 25

    Smoke Density (Ds )

    ASTM E 662

    Tested @ 4.0 minutes

    Tested @ 1.5 minutes

     

    < 50

    < 20

    Toxic Gas Emissions

    Rating

    SMP-800C

    Pass

    Environmental Properties

    Water Absorption

    Internal: 24 hrs @ room temp. 

    0.20 %

    UV Resistance 

    SAE J - 1960

    No Degradation

    Ozone Effect Rating 

    ASTM D 1171 

    0 (No Cracks)

    Corrosion Resistance 

    AMS - 3568 

    Pass

    Electrical & Thermal Properties

    Dielectric Constant 

    ASTM D 150 

    1.58

    Dielectric Strength 

    ASTM D 149, Volts/mil

    95

    Dry Arc Resistance 

    ASTM D 495, Seconds 

    98

    Volume Resistivity, Ohm – cm

    ASTM D 257 

    1014 

    Thermal Conductivity,

    w/m oK (BTU in/hr/ft2 /)

    ASTM C 518

    0.12 (0.84)

    Temperature Resistance

    Low Temperature Flex at -55 (-67)

    ASTM D 1056

    Pass

    Recommended Use Temperature,

    ()

    Internal

    -55° to 200° (-67° to 392°)

     

    The information contained in this data Sheet is intended to assist you in designing with IOTA Silicone. It is not intended to and does not create any warranties, express or implied, including any warranty of merchantability or fitness for a particular purpose or that the results shown on the Data Sheet will be achieved by a user for a particular purpose. The user should determine the suitability of IOTA Silicone for each application.



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