IPBC Alternatives Face Challenges in Meeting EU Biocidal Regulations

IPBC’s Role and Regulatory Challenges

IPBC is a crucial component in construction material preservatives under Product Type (PT) 10, protecting non-wood materials from fungal damage. However, its potential classification as an environmental endocrine disruptor under BPR’s substitution criteria has prompted an in-depth analysis of alternatives​​.

Evaluated Alternatives

The analysis identified two main candidates:

• Fludioxonil: A chemical fungicide with limited application to indoor use. Despite its technical feasibility in some scenarios, it lacks authorization for outdoor uses and availability in approved biocidal products​.
• Pythium oligandrum: A biological alternative suitable for indoor applications using waterborne formulations. However, its limited spectrum of efficacy and inability to serve in solvent-based or outdoor formulations restrict its viability​.

Challenges with Alternatives

Both alternatives fall short in addressing the comprehensive demands of construction material preservation, including efficacy, formulation compatibility, and market availability. Fludioxonil’s classification as a potential per- and polyfluoroalkyl substance (PFAS) also raises concerns over future regulatory restrictions​​.

Economic and Technical Constraints

Developing new biocidal substances faces prohibitive costs, averaging €10 million over a 10-year timeline. This deters innovation, leaving the industry dependent on existing substances that meet stringent BPR criteria​.

The absence of viable alternatives underscores IPBC’s critical role in PT 10 applications. The report advocates maintaining IPBC’s availability while exploring long-term innovations to meet environmental and safety standards​​.