Use case
Sustainable bio-based filler
Renewable, carbon-negative cork powder for composites and coatings.
Cork powder replaces mineral and petrochemical fillers in composites, coatings and binder systems — with a carbon footprint that is negative cradle-to-gate and a chemistry that improves rather than degrades the end-of-life profile.
Most fillers are inert. They add bulk without adding function, and they leave the composite with the same disposal problem as the matrix around them. Cork powder is different: it carries suberin, a natural waxy polymer that improves bonding in bio-based formulations and that biodegrades when the product reaches end of life.
In NBR and EPDM compounds, fine cork powder at 30–80 µm replaces mineral fillers at comparable loading levels while reducing compound density and improving compression recovery. In natural-binder systems, the suberin content acts as a partial co-binder, reducing the synthetic fraction needed to achieve strength.
Every batch carries traceability to the Portuguese cork forest of origin. For brands and formulators pursuing bio-based certifications or EPD documentation, that traceability closes the chain of evidence.
Why cork works
The material advantage.
- Carbon-negative cradle-to-gate when traced to Portuguese montado.
- Suberin content improves natural binding in bio-based formulations.
- Replaces talc, calcium carbonate and synthetic microspheres 1:1 by volume.
Products for this use