Ucore Verifies Louisiana RapidSX(TM) Equipment Scale-Up Configurations

Ucore announces: the successful completion of its RapidSX™ equipment ("RSX-1") scale-up verification program for its developing Louisiana Strategic Metals Complex in Alexandria, Louisiana selection of Enhanced Machine A's specific equipment and operational configurations Halifax, Nova Scotia--(Newsfile Corp. - August 5, 2026) - Ucore Rare Metals Inc. (TSXV: UCU) (OTCQX: UURAF) (" Ucore " or the " Company ") is pleased to announce that it has successfully completed the scale-up testing and optimization program for its commercial-scale RapidSX™ computerized and motionless mixing contactor assemblies to be deployed at its Alexandria, Louisiana, Strategic Metals Complex (" SMC "). This contactor equipment scale-up program (" RSX-1 ") builds on the 7,400+ hours of simulated commercial runtime on the Company's Demonstration Plant (" Demo Plant ") at its RapidSX™ Commercialization and Demonstration Facility (" CDF ") in Kingston, Ontario.

The contactor scale-up and optimization program is partially funded by Ucore's US Department of War US$18.4 million Other Transaction Agreement (" OTA ") Modification (US$20.4 million total) to facilitate the technology transfer from demonstration-scale in Kingston to full commercial-scale deployment in Louisiana. The completion of this optimized RapidSX™ equipment testing marks a significant milestone in Ucore's pathway to build its first commercial RapidSX™ rare earth separation machine, 'Enhanced Machine A', capable of processing 600 tonnes per year (" tpa ") of total rare earth oxides (" TREO ").

The Objectives of the RSX-1 scale-up and optimization program were to: verify the commercial scale-up of the 4" diameter Demo Plant contactors and matched phase separators, and associated piping, pumps, sensors, instruments, chemistry, and operational parameters up to the selected maximum 24" diameter contactor size design for the SMC; confirm that the RapidSX™ technology performs as expected and performs equal to or better than conventional solvent extraction (" CSX ") in all contactor sizes expected to be deployed at the Company's Louisiana SMC, under the most conservative chemistry assumptions;

The Results from the RSX-1 scale-up and optimization program were: Ucore developed an optimized operating profile for intermediate-size contactors based on over 400 completed tests with 1-1/4", 2", 4", 12", and 24" contactor diameters and configurations of organic/aqueous (" O/A ") ratios and hydraulic flux rates; Ucore designed, compared, optimized, and validated a 24" diameter contactor assembly against a four (4) by 12" diameter contactor assembly (i.e., the same total area, working in parallel) to take advantage of RapidSX™'s inherent equipment flexibility and modularity for varying hydraulic flux rates. This was also done for other equivalent area contactor configurations. Ucore selected the specific operational configurations and equipment for Enhanced Machine A and other planned SMC machines.

The Follow-On Enhanced Machine A activities from the RSX-1 scale-up and optimization program are: all testing information now exists to incorporate the results into detailed design engineering as part of the final Factory Acceptance Testing (" FAT ") program, Ucore will test the now optimized Enhanced Machine A individual contactor assembly configuration (i.e., a two (2) x 8" diameter RapidSX™ contactor assembly) with the specifically selected components and operational parameters as part of RSX-2 & RSX-3, planned for the remainder of August and September of 2026