Polyurethane foam (PU foam) is a versatile, expanding material used primarily for insulation and filling gaps or cracks. It is commonly used in the construction industry for sealing windows, doors, and wall cavities, providing thermal and sound insulation. When applied, PU foam expands to fill irregular gaps and hardens into a solid mass, forming a robust seal that helps with energy efficiency by preventing heat loss and air infiltration.

In addition to insulation, PU foam provides excellent soundproofing and water resistance, making it suitable for use in areas exposed to moisture or noise. This foam is also used in automotive, packaging, and DIY applications, where it helps with noise dampening, cushioning, and sealing. Its ease of use, along with its ability to expand to fit complex shapes, makes it a go-to material for a wide range of sealing and insulating tasks.