Our Spherix and Fortimix products are designed to serve as custom-engineered, performance-enhancing additives for rubber. Your products demand more. Fortimix surface-treated microspheres are revolutionary process aids for enhanced processing and properties. With surface functional groups in Fortimix, processors gain toughness, elastic recovery, tear, and compression set in addition to the many processing benefits of microspheres. Being a 100% post-industrial material, Fortimix replaces manufactured goods as process aids, contributing to corporate sustainability initiatives.