Formulated with an environmentally friendly HFO (Hydrofluoroolefin) blowing agent, Huntsmans FOAM-LOK 500 Open-Cell Spray Foam Insulation offers a low global warming potential (GWP), making it a sustainable choice for those looking to reduce their carbon footprint. Its open-cell foam structure also allows it to expand and fill gaps and voids, ensuring a tight seal that prevents air leaks and moisture infiltration. FOAM-LOK 500 is a reliable option for builders and homeowners seeking high-quality, energy-efficient insulation that also contributes to improved indoor air quality.