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Apr 16, 2025

Thermally Conductive Gap Fillers, Pads, Spacers, Soft-, Ultrasoft-Gel

Highly thermally conductive, soft and ultrasoft, electrically insulating, silicone-based Gap Filler Pads (TC Soft Silicone Gel Pads) are suitable for applications which, aside from thermal conductivity, require the compensation of large gaps and tolerances – especially in the case of non-planar builds without pressure – as well as good electric insulation.

The high elasticity of these products additionally contributes to mechanical dampening within the application. Owing to their thermal properties, these elastomeric films – especially putty materials with low to no spring-back – are the ideal T.I.M. solution for application with electronic components on SMD circuit boards.

We are able to provide a broad range of excellent and innovative, highly thermoconductive soft elastomers with thermal conductivities ranging from 1.0 to 13 W/mK.

Some variants are equipped with carrier materials such as fibreglass reinforcement, polymer mesh, or surface lamination for added mechanical stability, and/or with one-sided adhesive that affords easy automated montage.

PRODUCT PROPERTIES

  • Thermal conductivity from 1.0 to 13.00 W/mK
  • Thermal resistivity <0.2 °C-inch²/W possible
  • Very high dielectric strength (10 kV/mm AC)
  • Material thickness from 0.25 to 10.00 mm
  • (other gauges available upon request)
  • Soft and very adaptive; very good mechanical dampening properties
  • (plastic gap fillers lower still)
  • Effective at very low or zero pressure
  • High temperature resistance and reliability (-60°C to 200°C)
  • Non-flammable (UL 94 VO) for many variants

PROPERTIES AND ADVANTAGES AT A GLANCE

  • Process-safe handling/pre-application
  • Easy montage due to natural auto-adhesion; zero-residue removal
  • after use
  • Some variants (LMW silicones) low outgassing
  • Excellent mechanical dampening properties
  • Very process-safe due to even material thickness
  • Extraordinary elasticity and flexibility
  • Low hardness (Shore 00 ➞ <30), i.e. very soft

PRODUCT VARIANTS

  • Silicone-based elastomer with ceramic fillers
  • Easy pre-application due to auto-adhesiveness;
  • zero-residue removal after use
  • Unreinforced or reinforced (PET mesh, fibreglass-PI laminate)
  • Some variants possess very low outgassing rates, less low-molecular
  • siloxane (LMW silicones)
  • Very thin material gauges possible (0.25 – 0.30 mm)

DELIVERY FORMS AND VARIANTS

  • In sheets or on rolls (thickness <1mm) upon request for special cuts
  • Auto-adhesive on one or both sides or laminated on one side
  • Loose bulk, special kiss-cut formats on sheet
  • Equipped with release lining on both sides (PET film)
  • Other customer-specific delivery formats available upon request

TYPICAL AREAS OF APPLICATION

Silicone-based Gap Filler Pads for thermal linkage and electric insulation of heat source and heat sink, for compensation of large gaps and

tolerances are used in:

  • SMD power modules; engine controls; cooling systems;
  • interfaces between vias in PCBs and casings or heat sinks;
  • electrolytic capacitors; storage batteries

Applications e.g.:

  • Heat-Pipes, CD-ROM coolers; CPU modules; battery storage systems
  • UPS, SMPS displays etc.

See more information and data sheets here