Communicators

Vancouver, BC, Canada - April 27, 2021 - Rock Tech Lithium Inc. (the "Company" or “Rock Tech”) (TSX-V: RCK; Frankfurt: RJIB) is pleased to announce that it has engaged ANZAPLAN for further pilot plant testwork.

The Phase 2 pilot plant will provide additional lithium hydroxide monohydrate (“LHM”) customer samples while proving the flowsheet, converting spodumene concentrate into LHM following the industry-standard sulphate route. The feed material for the Phase 2 pilot plant will come from concentrates produced from commercial operations, demonstrating the flowsheet’s ability to receive material currently available in the global market.

“We are excited to be working with ANZAPLAN on our Europe-based lithium hydroxide pilot plant,” said Dirk Harbecke, Rock Tech’s chairman. “ANZAPLAN’s deep understanding of European industry and highly competent team of processing engineers, chemists and geoscientists will be a great asset to Rock Tech as we continue to advance our European lithium hydroxide converter plant.”

About ANZAPLAN

The Dorfner group of companies is a leading European industrial and specialty minerals producer with more than a century of experience in industrial and specialty minerals processing, delivering high quality materials, purified products and refined additives to a wide range of industries including the chemical, pharmaceutical, electronics, ceramics and glass industry. ANZAPLAN, established in 1985 as an independent entity within the Dorfner group of companies, provides a one-stop shop solution across all phases of the process development and economic evaluation of industrial and specialty mineral and metal projects - with technological expertise from its own laboratories, on-site test center and pilot plant processing facilities and extensive experience in mineral beneficiation and specialty chemical production.

On behalf of the Board of Directors,

"Dirk Harbecke"

Dirk Harbecke

Chairman

For further information, please contact:

Brad Barnett

Chief Financial Officer

Rock Tech Lithium Inc.

777 Hornby Street, Suite 600

Vancouver, B.C., V6Z 1S4

Telephone: (778) 358-5200

Facsimile: (604) 670-0033

Email: bbarnett@rocktechlithium.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Statements included in this announcement, including statements concerning our plans, intentions and expectations, which are not historical in nature are intended to be, and are hereby identified as, "forward‐looking statements". Forward‐looking statements may be identified by words including "anticipates", "believes", "intends", "estimates", "expects" and similar expressions. The Company cautions readers that forward‐looking statements, including without limitation those relating to the Company's future operations and business prospects, are subject to certain risks and uncertainties that could cause actual results to differ materially from those indicated in the forward‐looking statements.