RubberFEX is an industrial AI platform developed specifically for rubber compound development. It brings formulations, trial results, technical documents and engineering decisions into a structured workspace, helping teams make better use of existing technical knowledge. Rubber manufacturers, compounders, material suppliers and recyclers can work with versioned formulations in phr, link testing data to the exact compound version and use Mariel, the RubberFEX AI assistant, to investigate technical questions with source references where available. For circular rubber development, RubberFEX supports documenting recycled and devulcanised rubber in formulations, comparing alternatives against virgin reference compounds and retaining the evidence behind technical decisions. The same approach can support the evaluation of renewable and alternative raw materials. RubberFEX helps engineers investigate formulation options, learn from earlier trials and preserve technical expertise, while laboratory testing and qualification remain under engineering control. RubberFEX is operated by RubberFEX Operations UG (haftungsbeschränkt), Düsseldorf, Germany. Contact: info@rubberfex.com