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.

Details

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.

IOTA-HT-820

Property

Test Method

Typical Value

PHYSICAL

Color 

Gray

Thickness,  mm

(inches)

0.80 – 6.40 (0.031 – 0.25)

Standard Width, mm (inches)

914 (36)

Density, kg/m3 (lb./ft3)

ASTM D 1056 

368 (23)

Compression Force

Deflection, kPa (psi)

Force measured @

25% Deflection

ASTM D 1056

110.3

(16)

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 

345 (50)

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. 

0.80 %

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 

1.50

Dielectric Strength 

ASTM D 149, Volts/mil

93

Dry Arc Resistance 

ASTM D 495, Seconds 

96

Volume Resistivity, Ohm – cm

ASTM D 257 

1014 

Thermal Conductivity,

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

ASTM C 518

0.11 (0.75)

Temperature Resistance

Low Temperature Flex at -55C (-67)

ASTM D 1056

Pass

Recommended Use Temperature,

C ()

Internal

-55° to 200° (-67° to 392°)

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