company tower banner
Auburn Manufacturing Co. Company Logo

Auburn Manufacturing Co. PDF HT-840 Extra Firm Silicone Foam

Auburn Manufacturing Co. PDF HT-840 Extra Firm Silicone Foam that offers improved durability and sealing. It is used to seal or protect various outdoor communication, lighting or electronic enclosures, while providing protection against small dust particles, winddriven rain or fire. The material offers higher tear and tensile strength than lighter grade foams. Auburn silicone foams are available in various thicknesses and manufactured in roll form which can be easily converted into tapes, sheets or custom die cut gaskets.

Foam Type: Memory Foam

Density: 432.0 - 432.0 kg/m³, 432.675 - 432.675 kg/m³

Chemical Family: Silicones

End Uses: Aerospace Applications, Enclosures, Gaskets, Rail Interior, Seals

Physical Form: Foam

Technical Data Sheet
  • TypeDocument Name
View All Documents

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Foam Type
Product Type

Features & Benefits

Features & Benefits

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 Auburn silicone foams to perform consistently in all environments.
  • Compact cell structure and unique formulation provides enhanced sealing performance with resistance to penetration of fine particles or winddriven rain.
  • Available in roll goods, slit tapes or custom die cut parts. All Auburn silicone foams are available either plain or with an adhesive backing applied to one or both surfaces.

Applications & Uses

Application & Uses

Applications

  • Environmental seals to protect against penetration of dust, moisture, air, or light into outdoor enclosures such as lighting fixtures, HVAC units or electronic cabinets.
  • Vibration isolators in electronic components or transportation vehicles.
  • Shock absorbing cushions, pads or gaskets.

Properties

Color
Flame Rating
Physical Form
Environmental Properties
ValueUnitsTest Method / Conditions
Water Absorption (Internal, 24 hrs at Room Temperature)0.2%-
UV ResistanceNo Degradation-SAE J -1960
Ozone Effect Rating0 (No Cracks)-ASTM D 1171
Corrosion ResistancePass-AMS 3568
Typical Properties
ValueUnitsTest Method / Conditions
Thickness1.6 – 6.4mm-
Standard Width449.0mm-
Density (Force Measuredat 25% Deflection)27.0Ib/ft³ASTM D 1056
Compression Force Deflection (70°C)22.0psiASTM D 1056- Test D
Compression Set, Typical ( 100°C)max. 1%ASTM D 1056 Test D
Tensile Stength60.0psiASTM D 412
Elongation60.0%ASTM D 412
Fire & Smoke Properties
ValueUnitsTest Method / Conditions
Smoke Density (4.0 minutes)50.0-ASTM E 662
Toxic Gas Emissions RatingPass-SMP-800C & BSS 7239
Temperature Properties
ValueUnitsTest Method / Conditions
Low Temperature Filex (55°C)Pass-ASTM D 1056
Recommended Use Temperature55 - 200°CSAE J-2236
Recommended Intermittent High Temperature Use250.0°CInternal
Flame Characteristics
ValueUnitsTest Method / Conditions
Flame ResistanceListed V-0 and HF-1-UL 94
Flame Spread Indexmax. 25-ASTM E 162
Typical Thermal & Electrical Properties
ValueUnitsTest Method / Conditions
Dielectric Constant1.58-ASTM D 150
Dielectric Strength95.0Volts/milASTM D 149
Dry Arc Resistance98.0-ASTM D 495
Volume Resistivity1014.0Ohm- cmASTM D 257
Thermal Conductivity0.12W/m°KASTM C 518

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Technical Details
Standard Thickness Tolerance
Standard Thickness (Inches)

Tolerance (Inches)

0.031 ±0.015
0.062 ±0.02
0.093 ±0.02
0.125 ±0.025
0.188 ±0.025
0.25 ±0.03

 

Width Tolerance (Cellular)
Nominal Width (Inches) Tolerance (w/o PSA)

Tolerance (with PSA)

0 < T ≤ 3 ±0.063 ±0.031
3 < T ≤ 8 ±0.094 ±0.031
8 < T ≤ 12 ±0.125 ±0.031
12 < T ≤ 18 ±0.188 ±0.031
18 < T ≤ 26 ±0.219 ±0.063
26 < T ≤ 36 ±0.25 ±0.063

Packaging & Availability

Packaging Type