BASF Launches Next-Generation WALLTITE® RSB Closed-Cell Spray Polyurethane Foam, Based on Recycled and Bio-Based Feedstocks

December 12, 2025 - BASF announced the launch of its next-generation WALLTITE® RSB closed-cell spray polyurethane foam, further expanding its Spray Polyurethane Foam (SPF) product portfolio. Responding to the growing market demand for sustainable building materials, WALLTITE® RSB combines industry-leading performance with recycled and renewable materials, significantly reducing the product's overall carbon footprint.

BASF developed the WALLTITE® RSB closed-cell spray foam using its proprietary resin formulation, which incorporates both recycled and bio-based feedstocks. The resulting spray foam insulation solution helps customers in their green transition and offers transparent, third-party-verified environmental benefits, including reduced embodied carbon emissions.

Nancy Houle, Director of Spray Polyurethane Foam North America at BASF, stated: "We aim to create dual added value for our customers by offering high-performance and sustainable solutions. WALLTITE® RSB supports green building projects through two key advantages: it enhances a building's energy efficiency throughout its lifecycle and reduces embodied carbon emissions right from the start of construction."

The credentials for WALLTITE® RSB include pending certification under the USDA BioPreferred® Program and verification of recycled and bio-based content by UL Solutions. Furthermore, the manufacturer's Environmental Product Declaration (EPD) confirms that the product significantly lowers embodied carbon emissions compared to conventional formulations. These certifications make WALLTITE® RSB an ideal choice for projects pursuing LEED® certification, meeting U.S. Environmental Protection Agency (EPA) recommendations for preferential purchasing, or complying with low-carbon building requirements in both public and private sectors.