United States

The U.S. government is considering various approaches to address the use of high global warming potential (GWP) materials. In addition to regulatory-driven changes which are under consideration that may impact high global warming potential materials and drive higher performance foam insulation materials, there are also market pressures that favor the use of low GWP, high performance blowing agents like Solstice® Liquid Blowing Agent (LBA) and Solstice® Gas Blowing Agent (GBA).

Anticipating these regulations and similar initiatives globally, industry is preparing solutions to meet anticipated climate change regulations. Honeywell is an industry leader with our low GWP development program, including blowing agents, refrigerant gases, solvents and aerosols.

Solstice LBA

Solstice LBA has received all necessary regulatory approvals, including Toxic Substances Control Act (TSCA) and Significant New Alternatives Policy (SNAP) listings necessary for commercial sales of Solstice LBA and foam systems containing Solstice LBA.  It is considered VOC-exempt by the U.S. EPA.

Solstice GBA

Solstice GBA is used as a blowing agent for polyurethanes, polystyrene and other polymers. It has low environmental impact, as measured by its ultra-low global warming potential of less than 6 and is non-ozone-depleting.

It has been SNAP listed for all blowing agent applications in polyurethane and polystyrene foams. It also has received TSCA PMN approval and has been fully commercialized.  It is considered VOC-exempt by the U.S. EPA.


The measure that characterizes whether a chemical is a volatile organic compound (VOC) is the Maximum Incremental Reactivity (MIR). The measure (MIR) at which a chemical is generally considered to be a VOC, by U.S. regulation, is that of ethane.

Other low GWP materials, like propane or butane, because of their very short atmospheric lifetime, often prove to be VOCs that contribute to ground level ozone formation.

The Maximum Incremental Reactivity (MIR) of Solstice Liquid Blowing Agent has been measured at less than the value for ethane, and is VOC-exempt as determined by the U.S. EPA.

Enovate 245fa

Enovate 245fa is non-ozone-depleting and is VOC-exempt.