Thermal Gap Fillers

Thermal Gap Fillers


Tflex HR600 Series

Mid-Performance Gap Filler with 3 W/mK
Tflex HR600 is a cost-effective and compliant gap filler thermal interface material with
excellent thermal performance and great handling for mass-production applications.

The low modulus interface pad conforms to component topography, resulting in little stress
on the components, mating chassis or parts. The softness relieves mechanical stress from
high stack-up tolerance and absorbs shock, resulting in improved device reliability. Tflex
HR600’s recovery properties for applications requiring material rework result in continued
mechanical integrity even after device rework and re-assembly.

Tflex HR600 is naturally tacky on both sides and requires no additional adhesive coating to
inhibit thermal performance. The tack is designed to hold the pad in place during
assembly and component transport.

Tflex HR600 is electrically insulating, stable from -45ºC thru 200ºC, and meets UL 94V0
flame rating.

• Thermal conductivity 3 W/mK

• Soft and compliant

• Available in thicknesses from 0.010” thru 0.200” (0.25mm thru 5.0mm)

• Naturally tacky for adhesion during assembly and transport

Additional Product Description Standard Thicknesses
0.010-inch to 0.200-inch (0.25 to 5.0 mm)
0.010-inch and 0.015-inch thick materials come standard with fiberglass reinforcement designated by the suffix “FG”Options
Proprietary DC1 option available to eliminate tack from one side to aid in handling.

Material Name and Thickness
Tflex™ indicates elastomeric gap filler product line
HR6xxx indicates high recovery ‘6 series’ 3 W/mK material
FG desginates Fiberglass (available in 0.010 and 0.015-inch thickness only)
DC1 designates proprietary option eliminating tack from one side

Tflex™ HR6120 = 0.120-inch thick material
Tflex™ HR610FG = 0.010-inch thick material with fiberglass reinforecement
Tflex™ HR6120-DC1 = 0.120-inch thick material with proprietary DC1 option

Applications • Cooling components to chassis, frame, or other mating components
• Memory modules
• Home and small office network equipment
• Mass storage devices
• Automotive electronics
• Telecommunication hardware
• Radios
• LED solid state lighting
• Power electronics
• LCD and PDP flat panel TV
• Set top boxes
• Audio and video components
• IT infrastructure
• GPS navigation and other portable devices
Color Dark Grey
Density 2.52
Dielectric Constant Range 17.6
Elongation at Break Pending

Construction & Composition

Ceramic filled silicone sheet

Thickness Range

0.020 (0.50mm)-0.200(5.08mm)

Thickness Tolerance

+/- 10%

Outgassing CVCM (Post Cured)


Thermal Resistance @ 40 mils, 20 psi @ 1mm, 138KPa

0.35 °C-in2/W 2.26 °C-in2/W

Percent Deflection @ 10 psi


Percent Deflection @ 50 psi


Percent Deflection @ 100 psi


Thermal Expansion

217 ppm/°C

Breakdown Voltage


Outgassing Total Mass Loss 0.19
Product Line Tflex HR600 Series
Shore Hardness 40
Temperature Range (Max Celsius) 200.00
Temperature Range (Min Celsius) -45.00
Tensile Strength del 15
Thermal Conductivity (W/mK) 3.00
Thickness Max (mm) 5.00
Thickness Min (mm) 0.25
UL Flammability 94 V0
Volume Resistivity Volume Resistivity Del 9


A service that is competitive, responsive and reliable

Our sales team and engineers are happy to work directly on site with clients always providing a personal and direct approach to fulfilling customer needs

  • High quality products that are produced in the UK (not China).
  • Local Sales team and engineers available 5 days per week.
  • Comprehensive back up and after sales service, with an actual technician ready to listen and help on the telephone 5 days a week. (No automated phone queuing system)
  • All products are REACH and ROHS compliant.
  • A Reliable, discreet and trustworthy partner with a proven track record in design and engineering.
  • Very competitive compared to overseas competition.
  • A huge reduction in air miles and lead times compared to overseas suppliers.
  • Able to deliver to most destinations in the European Union within 24hrs.

Microwave Absorbers

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NOTICE: The information contained herein is to the best of our knowledge true and accurate. However, since the varied conditions of potential use are beyond our control, all recommendations or suggestions are presented without guarantee or responsibility on our part and users should make their own tests to determine the suitability of our products in any specific situation. This product is sold without warranty either expressed or implied, of fitness for a particular purpose or otherwise, except that this product shall be of standard quality, and except to the extent otherwise stated Techni3’s invoice, quotation, or order acknowledgement. We disclaim any and liability incurred in connection with the use of information contained herein, or otherwise. All risks of such are assumed by the user. Furthermore, nothing contained herein shall be construed as a recommendation to use any process or to manufacture or to use any product in conflict with existing or future patents covering any product or material or its use.