BASF launches WALLTITE RSB spray polyurethane foam insulation, advancing sustainability in construction materials

• WALLTITE RSB incorporates recycled and renewable raw materials for a lower product carbon footprint (PCF) than conventional formulations
• New product meets growing demand for more sustainable building materials
• Third-party verification of biobased and recycled content ^[1][2]

WYANDOTTE, MI, December 12, 2025 – BASF is expanding its spray polyurethane foam (SPF) portfolio with WALLTITE^® RSB, a next-generation, closed-cell spray polyurethane foam. In response to the growing demand for more sustainable building materials, WALLTITE RSB combines industry-leading performance with a blend of recycled and renewable content for a lower overall carbon footprint.

BASF engineered the system with a proprietary resin formulation that incorporates both recycled and biobased raw materials. The result is a spray foam insulation solution that enables customers’ green transformation with transparent, third-party verified environmental benefits, including reduced embodied carbon.

“We want to create double-added value for our customers by providing high-performance and sustainable solutions, “said Nancy Houle, BASF Business Director for Spray Polyurethanes North America, “WALLTITE RSB supports green building programs by offering two key advantages: it can improve the energy efficiency throughout the building’s lifespan and lower embodied carbon from the outset of construction.”

WALLTITE RSB’s credentials include pending USDA BioPreferred^® Program certification and UL Solutions validation of recycled and biobased content. In addition, a manufacturer-specific Environmental Product Declaration (EPD) confirms measurable reductions in embodied carbon compared to conventional formulations.^[3] These accreditations make WALLTITE RSB an ideal option for projects pursuing LEED^® certification, meeting EPA Preferred Purchasing recommendations, or aligning with both public and private sector low-carbon construction mandates.

More information: https://spf.basf.com/sustainable-spray-foam-solution

WALLTITE^® is a registered trademark of BASF SE.

LEED^® an acronym for Leadership in Energy and Environmental Design™ is a registered trademark of the United States Green Building Council.

[1]  Pending USDA Biobased certification via ASTM D6866 standard, which measures the percentage of biobased carbon in the product.

[2]  Based on UL Solutions pending Environmental Claims Validations (ECV):  UL2809 for Recycled Content and UL 9798 for Bio-based Content Verification.

[3]  The product carbon footprint (PCF) calculations follow the requirements and guidance given by ISO 14067:2018.

About BASF’s Performance Materials division 

BASF’s Performance Materials division leads the transformation of the plastics industry by merging sustainability with a competitive edge. Our broad material competencies and product portfolio, backed by deep industry knowledge and understanding, make us the ideal one-stop-shop. With dedicated material-focused teams and strong R&D power, we constantly deliver industry-leading technologies and expertise to our customers worldwide. Our global network ensures a competitive advantage through superior innovations, regional proximity, and tailor-made solutions that meet local market demands. We are committed to enhancing performance and efficiency across sectors such as automotive, consumer goods, industrial applications, and construction. With BASF, our partners embark on #OurPlasticsJourney towards a more circular and sustainable future. In 2024, the Performance Materials division achieved global sales of €6.8 billion. Join #OurPlasticsJourney on LinkedIn https://www.linkedin.com/showcase/basf-performance-materials/ and in our newsletter https://plastics-rubber.basf.com/global/en/performance_polymers/plastics-journey-newsletter  

About BASF

BASF Corporation, headquartered in Florham Park, New Jersey, is the North American affiliate of BASF SE, Ludwigshafen, Germany. BASF has approximately 16,000 employees in North America and had sales of $19.7 billion in 2024. For more information about BASF’s North American operations, visit www.basf.com/us.

At BASF, we create chemistry for a sustainable future. Our ambition: We want to be the preferred chemical company to enable our customers’ green transformation. We combine economic success with environmental protection and social responsibility. Around 112,000 employees in the BASF Group contribute to the success of our customers in nearly all sectors and almost every country in the world. Our portfolio comprises, as core businesses, the segments Chemicals, Materials, Industrial Solutions, and Nutrition & Care; our standalone businesses are bundled in the segments Surface Technologies and Agricultural Solutions. BASF generated sales of €65.3 billion in 2024. BASF shares are traded on the stock exchange in Frankfurt (BAS) and as American Depositary Receipts (BASFY) in the United States. Further information at www.basf.com.