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BISCO HT-840

Rogers BISCO HT-840 Extra Firm Cellular Silicone provides enhanced durability with the excellent sealing properties of sponge rubber.

BISCO HT-840

BISCO HT-840 Extra Firm Cellular Silicone is a very firm-grade silicone foam that offers superior sealing capabilities.

HT-840 silicone provides a higher tear and tensile strength than our lighter-grade foams.

HT-840 silicone is designed for use in enclosures requiring a more durable, high-closure force gasket. This material is also ideal for use in press pads requiring greater conformability and even pressure distribution at high temperatures.

HT-840 silicone is a great choice for sealing and protecting outdoor communication, lighting, and electronic enclosures from small dust particles, wind-driven rain, and fire.

Data Sheet
Thickness
Features
Benefits
Applications
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BISCO HT-840 Data Sheet

PROPERTYTEST METHODTYPICAL VALUE*
ColorVisualGray
Thickness, mm (inches)Internal1.59 - 6.35
(0.063 - 0.250)
Density, kg/m³ (lb./ft³)Internal448
(28)
Compression Force Deflection, kPa (psi)ASTM D1056142
(20.6)
Compression Set, %ASTM D1056 100°C (212°F) / 22 hrs / 50%1.8
Water Absorption, %Internal
2" below water surface / 24 hrs /
change in weight
0.5
Temperature Range, °C (°F)Internal-55 to +200
(-67 to +392)
Thermal Conductivity, W/m °K ASTM D5180.09
Low Temperature FlexASTM D1056
-55°C (-67°F) / 5 hrs
Pass
Low Temperature BrittlenessASTM D746
-55°C (-67°F) / 3 min
Pass

BISCO HT-840 Thickness

NOMINAL THICKNESSTOLERANCE
mm (inches)mm (inches)
1.59
(0.063)
± 0.508
(± 0.020)
2.39
(0.094)
± 0.508
(± 0.020)
3.18
(0.125)
± 0.635
(± 0.025)
4.78
(0.188)
± 0.635
(± 0.025)
6.35
(0.250)
± 0.762
(± 0.030)

BISCO HT-840 Features

  • Compact cell structure
  • Available in thicknesses from 0.063 to 0.250 in.
  • The typical density of 28 PCF
  • CFD range of 16-26 PSI
  • Resistant to UV, ozone, extreme temperatures, and flame

BISCO HT-840 Benefits

  • Provides enhanced durability and sealing performance
  • Offers consistent performance in all environments
  • Reduces maintenance costs associated with gasket failures due to compression set and softening

BISCO HT-840 Applications

  • Cold Supply Chain
  • Gap Filling
  • Gasketing&Sealing
  • Shock Absorption
  • Vibration Management
  • Cutting or slitting to the length and width required by the customers
  • Laminate double-sided tape or other materials
  • Die cut according to customer's drawing

Contact AdhTapes

Feel free to contact the AdhTapes team via WhatsApp, WeChat, Email, or Phone Calls for any questions you may have,
our well-trained operation team is ready to give you the answers you need. 
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    +86-755-2301-3143
    +86-158-7555-3143
    NO.57 Houting Second Industry Area Shajing Baoan Shenzhen China 518104

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