Energy Efficient Blowing Agent Choices

Foam blowing agents expand polyurethane foam, creating highly energy-efficient insulation for roof and wall panels of temperature-controlled environments. Insulated metal panels (IMPs) are typically formed with polyurethane (PUR) or polyisocyanurate (PIR) foam sandwiched between two metal sheets to make composite roof, wall, and partition panels.

The choice of foam blowing agent during fabrication directly impacts the performance of the finished product and operating costs of the structure. Honeywell foam blowing agents are are preferred for their thermal insulation properties for rigid insulating foams.

Low Global Warming Potential (GWP) Blowing Agent

With its outstanding thermal performance and a GWP of 1, Honeywell Solstice® Liquid Blowing Agent (LBA) is a balanced solution to today’s environmental and performance challenges in insulated metal panel applications.

Solstice LBA is the next generation of high performance foam blowing agents from the leader in foam blowing agent technology. Engineered to advance state-of-the-art panel manufacturing and polyurethane insulation technology, Solstice LBA delivers unique performance advantages in a variety of applications:

Superior Insulation Performance

  • Increases R-value of conventionally processed PUR and PIR foam in both continuous and discontinuous panel operations
  • Up to 2mW improvement compared to pentane blown boards
  • Translates to a thinner panel to achieve desired performance


  • GWP of 1
  • Supports compliance with current and future environmental regulations

Advanced Physical Properties, Mechanical Stability, and Nonflammability

Research and field trial data on Solstice LBA shows:

  • Improved thermal performance
  • Proven nonflammablility
  • Significantly better dimensional stability at high temperatures than systems formulated with pentanes or HFC-134a
  • Higher compressive strength than IMPs formulated with pentane, HFC-134a or HCFC-141b

Ease of Use

  • “Drop-in” replacement for conventional panel processing equipment
  • Working with major systems producers to ensure required testing and data is available to meet most applications
  • Requires no investment in plant equipment to meet flammability or other special concerns
  • Straightforward and cost-effective transitions

Contact us to learn more about Honeywell Solstice LBA in insulated metal panels.

A Proven Foam Blowing Agent for Insulated Metal Panels

Enovate® 245fa blowing agent provides discontinuous and continuous insulated metal panel (IMP) manufacturers with a wide range of processing and performance benefits. It’s an ideal non-ozone-depleting, nonflammable replacement for HCFC 141b, HCFC-22 and other foam blowing agents being phased out in accordance with the Montreal Protocol.

Enovate blowing agent provides IMP manufacturers many benefits including:

Greater Energy Efficiency

  • 10% higher R-value (at 30°F / -1°C) compared to hydrocarbon-blown panels in internal tests

Greater Dimensional Stability and Durability

  • Will not condense in foam as the temperature drops in typical cold storage applications (Panels formulated with other foam blowing agents experience condensation, which can lead to dimensional stability issues in the finished panel.)
  • Panel durability further enhanced by excellent adhesion to metal skins and compressive strength

Regulatory Compliance

  • Meets Montreal Protocol requirements
  • Supports compliance with phase-out of HCFC-141b

Minimal Conversion Costs

  • Rapid deployment
  • “drop-in” replacement*

* minor equipment modifications may be necessary, depending on how current foam blowing agent is stored and routed through facility

Excellent Processing with Favorable Cost Implications

  • Excellent flow properties
  • Good solubility in polyols
  • Potential foam density reductions
  • Possible waste reduction due to ease of processing

Improved Environmental and Safety

  • Nonflammable
  • No impact on the ozone layer
  • Not considered Volatile Organic Compound (VOC) in U.S.
  • Foam cores blown with Enovate meet the ASTM E-84 Class 1 specification
  • Foam cores blown with Enovate require no special handling during installation
  • Enhances worker safety and helps reduce potential facility risks

Some examples of Panel applications include:
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