The article highlights how Arlon 3000XT®, a groundbreaking cross-linked PEEK-based polymer developed by Greene Tweed, is addressing the material challenges associated with hydrogen technologies. With a focus on enabling oil and gas companies to operate in deeper reserves with higher temperatures and pressures, the polymer has now been optimized to meet the complex demands of hydrogen applications. From enhancing the efficiency of electrolysers by offering improved chemical resistance to providing solutions for fuel cells, compressors, and valves operating in harsh hydrogen environments, Arlon 3000XT® is positioned as a versatile material for various components. Greene Tweed's investment in custom compounds based on this polymer showcases their commitment to continuous innovation in material science. The article emphasizes the transformative potential of Arlon 3000XT®, which has been validated through rigorous testing under high-pressure cyclic exposure to hydrogen environments. This testing, conducted as part of a research program with two US national labs, demonstrated the material's stability and suitability for hydrogen applications. Notably, beyond hydrogen, the material shows promise in addressing challenges in the carbon capture industry. The versatility of Arlon 3000XT® is further illustrated through its potential applications in decarbonisation efforts. The article discusses how the polymer's unique properties can enhance the performance of PEEK packings in absorber columns, offering superior wetting results and increased mechanical strength and chemical resistance at high temperatures. By pushing the limits of traditional PEEK grades, Arlon 3000XT® presents itself as a key solution to the evolving material challenges in sectors transitioning towards decarbonisation. In conclusion, the article highlights the significance of crosslinking in enhancing chemical resistance and reducing swelling for polymers, with Arlon 3000XT® demonstrating superior temperature capabilities compared to standard PEEK grades. The material's potential to operate at temperatures close to boiling points in various applications positions it as a versatile and innovative solution for industries facing material challenges in hydrogen technology and beyond.