Bergquist GAP PAD® brand gap fillers provide effective thermal interfaces between heat sinks and electronic devices, accommodating for uneven surfaces, air gaps and rough surface textures. The thermally conductive pad's soft construction offers high conformability to reduce interface resistance. In addition to effective heat dissipation, thermal GAP PAD® gap fillers also help reduce vibration stress for shock dampening.

Exceptionally simple to use, Bergquist GAP PAD® materials are manufactured to size and facilitate easy application: operators simply peel the protective film and place the thermal management pad on the desired component.

GAP PAD® gap fillers are produced in a variety of standard dimensions and thicknesses, but can also be customized for specific application requirements. Available as custom die cut parts with the ability to individualize thickness and constructions, thermal GAP PAD® materials are always fit for purpose to ensure optimized thermal control no matter what the application.

GAP PAD® Materials

With shock dampening abilities,  thermal GAP PAD® gap fillers are recommended for applications that require a minimum amount of pressure between components. For applications that do not allow silicone, such as silicone-sensitive optic components and automotive lighting, thermal GAP PAD® materials are available in a silicone-free formulation.

The broad GAP PAD® family provides an effective thermal interface between heat sinks and electronic devices where textures are present, and the GAP PAD® thermal conductivity range is extensive — going as high as 12.0 W/mK. Henkel application specialists work closely with customers to specify the proper GAP PAD® material for each unique thermal management pad requirement.


Each of the many products within the GAP PAD® portfolio is unique in construction, properties and performance. Thermal gap filler include the following features:

  • Low-modulus Polymer material
  • Available with fiberglass/rubber carriers or in a non-reinforced version
  • Innovative filler technology to achieve specific thermal and conformability characteristics
  • Highly conformable to uneven and rough surfaces with very low-stress thermal gap filler compression
  • Electrically isolating
  • Natural tack on one or both sides with protective liners
  • Variety of thicknesses and hardnesses
  • Range of thermal conductivities
  • Available in sheets and die-cut part


GAP PAD® brand thermal products are designed to improve an assembly’s thermal performance and reliability.

  • Eliminate air gaps to reduce thermal resistance
  • Ultra-conformable with minimal thermal gap filler compression, low modulus reduces interfacial resistance
  • Low-stress vibration dampening
  • Shock absorbing
  • Easy material handling
  • Simplified application
  • Puncture, shear and tear resistance
  • Improved performance for high-heat assemblies


Some GAP PAD® products have special features for particular applications, including:

  • Available with or without adhesive
  • Rubber-coated fiberglass reinforcement
  • Thicknesses from 0.010 in. to 0.250 in.
  • Available in custom die-cut parts, sheets and rolls (converted or unconverted)
  • Custom thicknesses and constructions
  • Adhesive or natural inherent tack
  • Silicone-free thermal GAP PAD® products available in thicknesses of 0.010 in.-0.125 in.
  • Custom, specialized GAP PAD® gap fillers are available; tooling charges vary depending on tolerance and complexity of the part



GAP PAD® thermal interface products are well-suited to a wide variety of electronics, automotive, medical, aerospace and satellite applications such as:

  • Between an IC and a heat sink or chassis; typical packages include BGAs, QFPs, SMT power components and magnetics
  • Between a semiconductor and heat sink
  • Memory modules; heat pipe assemblies
  • Hard drive cooling
  • Power supplies
  • IGBT modules
  • Signal amplifiers

GAP PAD® Applications and Industries

Henkel’s GAP PAD® brand gap fillers can be used for both industrial and consumer applications in the following industries

Resources for GAP PAD® Materials