Firm Cellular Silicone IOTA-HT-820
IOTA-HT-820
is a 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
Good 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 pentration 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.
Installation
Available with a
pressure-sensitive adhesive on one or two sides to allow easy application to a
variety of surfaces.
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IOTA-HT-820
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Property
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Test Method
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Typical Value
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PHYSICAL
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Color
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Gray
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Thickness, mm
(inches)
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0.80 – 6.40 (0.031 – 0.25)
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Standard Width, mm (inches)
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914 (36)
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Density, kg/m3 (lb./ft3)
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ASTM D 1056
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368 (23)
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Compression Force
Deflection, kPa (psi)
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Force measured @
25% Deflection
ASTM D 1056
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110.3
(16)
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Compression Set,
% max.
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ASTM D 1056
Test D @ 70℃
(158℉)
ASTM D 1056
Test D @ 100℃
(212℉)
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< 1
< 5
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Tensile Strength, kPa (psi)
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ASTM D 412
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345 (50)
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Elongation, %
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ASTM D 412
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55
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FLAMMABILITY & OUTGASSING
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Flame Resistance
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UL 94
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Listed V-0 and HF-1
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Flame Spread Index (Ls)
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ASTM E 162
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< 25
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Smoke Density (Ds )
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ASTM E 662
Tested @ 4.0 minutes
Tested @ 1.5 minutes
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< 50
< 20
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Toxic Gas Emissions
Rating
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SMP-800C
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Pass
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Environmental
Properties
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Water Absorption
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Internal: 24 hrs @ room
temp.
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0.80 %
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UV Resistance
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SAE J - 1960
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No Degradation
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Ozone Effect Rating
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ASTM D 1171
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0 (No Cracks)
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Corrosion
Resistance
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AMS - 3568
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Pass
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Electrical
& Thermal Properties
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Dielectric Constant
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ASTM D 150
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1.50
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Dielectric Strength
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ASTM D 149, Volts/mil
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93
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Dry Arc Resistance
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ASTM D 495, Seconds
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96
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Volume Resistivity, Ohm –
cm
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ASTM D 257
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1014
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Thermal Conductivity,
w/m oK (BTU in/hr/ft2 /℉)
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ASTM C 518
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0.11 (0.75)
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Temperature
Resistance
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Low Temperature Flex at
-55C (-67℉)
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ASTM D 1056
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Pass
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Recommended Use
Temperature,
C (℉)
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Internal
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-55° to 200° (-67° to 392°)
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