A recyclable radar-absorbing coating that renders objects nearly invisible to radar while remaining non-toxic and fully reusable: that is the direction a Dutch start-up is pursuing together with the University of Twente. The coating combines strong electromagnetic absorption with a material composition built entirely on European raw materials. In doing so, the development touches three themes currently shaping European manufacturing: functional surface technology, circularity and strategic raw-material independence.
How radar-absorbing coatings work
Radar-absorbing materials (RAM) convert incoming electromagnetic waves into heat rather than reflecting them. Classic solutions often rely on ferrites, carbon or heavy metals that are heavy, brittle or hard to process — and almost never recyclable. The new system aims to remove these drawbacks by achieving absorption with a non-toxic, reusable formulation. Its key properties:
- Strong absorption across a relevant frequency range, reducing an object's radar reflection.
- Non-toxic composition without the heavy metals or harmful additives that complicate processing and waste handling.
- Full recyclability, so the coating does not end up as residual waste at end of life.
- European raw materials, reducing dependence on imports from Asia and elsewhere.
The combination is technically demanding: absorption, mechanical durability, applicability and recyclability often pull in opposite directions. A formulation that unites these properties is therefore more than a niche innovation.
Why circularity and European materials converge now
The development fits a broader shift. European manufacturers face pressure from stricter environmental regulation, rising requirements around industrial chemistry, adhesives and coatings, and an increasing focus on supply-chain transparency. At the same time, recent geopolitical turbulence makes painfully clear how vulnerable Europe is to disruptions in the supply of critical materials. A coating that runs entirely on European raw materials lowers that risk and aligns with the drive toward strategic autonomy.
Recyclability is no longer an afterthought either. Where surface treatment was long judged on function and cost, the end-of-life question now weighs more heavily. Manufacturers that today use wet painting and spraying or other finishing processes increasingly face questions about the environmental impact and reusability of their coatings.
Applications beyond defence
Radar absorption immediately evokes stealth technology, but the field of application is broader. As radar and sensor technology penetrate civilian domains, the need for controlled electromagnetic behaviour grows:
- Automotive and mobility: driver-assistance systems use radar; unwanted reflections between sensors can degrade performance.
- Telecom and 5G/6G: shielding and damping prevent interference in dense antenna environments.
- Test environments: anechoic chambers and measurement set-ups require reliable absorption.
- Industrial electronics: EMC control becomes stricter as equipment grows more wirelessly connected.
For suppliers, this means a functional coating with a clean environmental profile could serve multiple markets, provided its properties are validated in practice through thorough testing, inspection and NDT.
From laboratory to production-ready application
A promising formulation is not the same as a scalable product. The road to industrial application has familiar hurdles: reproducible application methods, adhesion to varied substrates, resistance to weather, wear and temperature, and a recycling route that works in practice. Integration with existing composite materials and metallic substrates also demands attention, because the coating must conform to the structure beneath it.
The collaboration between a start-up and a technical university is typical of how material innovation emerges in the Netherlands: fundamental research that moves toward market via a spin-off. Success depends on scaling up, qualification with customers and finding first applications that carry the business case.
What this means for the manufacturing industry
For Dutch and European manufacturers, this development underlines that functional surface technology is becoming a strategic playing field. Coatings that perform, are non-toxic and recyclable at the same time align with tightening regulation and customer expectations around sustainability. Those who factor surface treatment into product design now — rather than treating it as an afterthought — build an advantage. The lesson is not that radar absorption is suddenly needed everywhere, but that the combination of performance, circularity and European supply security is becoming the new quality benchmark for material choices in industry.