What Are Phase Change Materials? 

Phase change material products replace grease as the interface between power devices and heat sinks to provide effective thermal performance in components. LOCTITE® dispensable and printable phase change thermal compounds create a significantly thinner bondline and lower thermal resistance when compared to other formats. 

The no-mess thixotropic characteristics keep phase change material products from flowing out of the interface, simplifying handling and providing a non-tacky material at room temperature. 

LOCTITE® Bergquist® thermal interface material phase change products can be integrated into a fully automated process, giving customers fast and flexible processing for mass production and high throughput.


Why Use Henkel Phase Change Materials?

Henkel is a world-leading phase change material supplier. LOCTITE® Bergquist® dispensable and printable phase change thermal compounds give you better long-term thermal performance, with less mess. 

Our phase change materials react faster to a change in temperature than greases and pastes, changing from a solid to a liquid to efficiently release and absorb heat for better dissipation and stronger thermal performance.

Save time and money in your manufacturing processes when you choose phase change materials as an alternative to thermal grease. 


Compare Phase Change Materials

Discover the full range of phase change material products available from Henkel. These include adhesive and non-adhesive options, film or fiberglass carriers for electrical isolation, tabbed parts, die-cut parts, sheets, and bulk rolls. Custom options are also available to suit your needs.


Explore the full range of LOCTITE® Bergquist® phase change materials and download product-specific technical data sheets (TDS) to learn more. Find information on hazardous substances with the restriction of hazardous substances sheet (RoHS), or download a safety data sheet (SDS) for details on safe use.

Features of Phase Change Materials

HI-FLOW phase change materials provide similar handling to Bergquist® SIL PAD® materials at room temperature but flow like grease at their designed phase change temperature. Features of our thermal grease alternatives include: 

  • Comparable thermal performance to grease in most applications.
  • Thermally conductive phase change interface compound.
  • Aluminum, film or fiberglass carriers and non-reinforced versions.
  • Low volatility substitute for thermal grease products.
  • Easy to handle and apply in the manufacturing environment.
  • Tackified or tack-free at room temperature.

Benefits of Phase Change Materials

Using Bergquist® HI-FLOW or LOCTITE® dispensable/printable phase change materials as a substitute for thermal grease can save time and money without sacrificing thermal performance. Benefits of our phase change materials include:

  • No mess thixotropic characteristics of the materials keep it from flowing out of the interface.
  • Easier handling due to being tackified or tack-free at room temperature.
  • No protective liner required (HI-FLOW).
  • High thermal performance helps ensure CPU reliability.
  • Does not attract contaminants in assembly.
  • Easier material handling, shipping, and processing.
  • Simplified application that can be easily automated.

Phase Change Material Options

The broad HI-FLOW and LOCTITE® product phase change portfolios offer a variety of choices to meet performance, handling, and process needs, including:

  • Availability with or without adhesive for application needs.
  • Dispensable/printable for high throughput processing.
  • Dispensable/printable phase change materials are dry to the touch and can be pre-applied on certain devices such as power components.
  • Aluminum carrier for applications not requiring electrical isolation.
  • Film or fiberglass carrier for electrical isolation.
  • Dry, non-reinforced material.
  • Tackified or tack-free at room temperature.
  • Tabbed parts, die-cut parts, sheets, or bulk rolls.
  • Adhesive specifically for cold application without preheating heat sink.
  • Customized options are available; tooling charges vary depending on the complexity of the part.

Explore Applications

HI-FLOW products and other LOCTITE® Bergquist® thermal grease alternatives suit various applications. From consumer electronics and automotive manufacturing to medical and aerospace, find phase change materials to improve thermal performance in tasks including:

  • UPS and SMPS AC/DC, DC/DC or linear power supplies
  • Between a CPU and heatsink
  • Power conversion devices
  • Fractional and integral motor control
  • Leaded, surface mount, and power modules
  • In applications using clips and screws, where constant clamp load can be relied upon to ensure steady, constant contact between the phase change material and the component.

Resources for Phase Change Materials

Find out more about the specifications for our thermal interface material phase change products and the wider range of thermal interface materials. Download the brochures below. 

Phase Change Materials FAQs

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