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Rock Tech Announces Re sults from Lithium Hydr oxide Pilot P lant in Germany – High Quality, Battery Grade Lithium Hydroxide Produced

Metallurgy & Processing

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB | OTCQX: RCKTF

Rock Tech Announces Re sults from Lithium Hydr oxide Pilot P lant in Germany – High

Quality, Battery Grade Lithium Hydroxide Produced

Vancouver, BC, Canada – October 18, 2021 – Rock Tech Lithium Inc. (the "Company" or

“Rock Tech”) (TSX -V: RCK; Frankfurt: RJIB ; OTCQX: RCKTF ) is p leased to announce

completion of a pilot test program and prototype production of battery grade lithium hydroxide

monohydrate greater than 99.5% purity, in compliance with end-user electric vehicle lithium-ion

battery production specifications.

Rock Tech has been develo ping and optimi zing a commercially proven process technology to

produce battery grade lithium hydroxide monohydrate (BG-LHM) from various spodumene

concentrates. The process technology was developed to optimize conversion and purification of

lithium from concentrates produced a t several min ing operations in Australia and North

America.

The process technology was pilot tested at Anzaplan of Germany to demonstrate product quality

using the process design developed for Rock T ech by Wave International of Australia. Several

test programs are in progress at various equipment vendor test facilities to finalize the design and

process equipment selection for commercial scale solution purification and cr ystallization

circuits.

Through consultation with tier 1 end users, the Company planned and delivered a high-end

product specification which exceeds the requirements of GB/T 2600 8-2020 D1 , a Chinese

technical standard commonly considered as the benchmark for BG -LHM. The Company ha s

targeted su ch a specifi cation in order to attract tier 1 cust omers, and de-risk the future

marketability of the Company’s product as customers continue to demand higher specification

cathode materials over time.

“We ar e pleased with the initial test results from our batchwise pilot program in

Germany,” said Don Stevens, Rock Tech ’s Chief Te chnology Officer . “The results

demonstrate the functi onality of our process flowsheet to produce high quality, b attery

grade lithium hydroxide and are key input s into the desig n of our first planned

commercial scale lithium hydroxide converter.”

The Co mpany has received a sample of BG-LHM as a produ ct f rom the Anzaplan pilot test

program and has begun shipping samp les to potential customers (end-users) for product quality

testing as offtake discussions progress.

“Discussions with potential LHM customers are intensifying,” said Dirk Harbecke, Rock

Tech’s Chairman and Chief Executive Officer. “Understanding the pe rformance of

spodumene feedstock in our flow sheet and meeting potential customer product

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB | OTCQX: RCKTF

specifications are k ey mil estones for us as we aim to build Europe ’s firs t lithium

hydroxide converter.”

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB | OTCQX: RCKTF

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.

About Wave International

Wave International (Wave) are a leading consultancy specializing in the battery and technical

metals sectors, with specific expertise in the lithium ion battery supply chain. Wave have over 18

years experience in lithium processing, including upstream mineral concentrates and downstream

lithium chemical manufacturing. Wave are headquartered in Australia, with offices in the

Netherlands, Mongolia and South Africa.

About Rock Tech Lithium Inc.

Rock Tech is a cleantech company powering the electric mobility revolution. The Company aims

to serve the automotive industry with high-quality lithium hydroxide. Rock Tech’s goal is to zero

out emissions – one lithium battery at a time by becoming the first closed-loop lithium company,

using and reusing lithium for a cleaner future.

On behalf of the Board of Directors,

"Dirk Harbecke"

Dirk Harbecke

Chairman & Chief Executive Officer

For further information, please contact:

Thomas Rolfes

Head of Public Relations

Rock Tech Lithium Inc.

777 Hornby Street, Suite 600

Vancouver, B.C., V6Z 1S4

Telephone: (778) 358-5200

Facsimile: (604) 670-0033

Email: [email protected]

Cautionary Note Concerning Forward-Looking Information

The following cautionary statements are in addition to all other cautionary statements and disclaimers contained elsewhere in, or referenced by,

this news release.

Certain information set forth in this news release contains “forward-looking information” within the meaning of applicable Canadian securities

laws. All statements other than statements of historical facts included in this news release, including those regarding Rock Tech’s opinions,

beliefs and expectations, business strategy, development and exploration opportunities and projects, mineral resource estimates, drilling and

modeling plans, and plans and objectives of management for operations and properties constitute forward-looking information. Generally,

forward-looking information can be identified by the use of words or phrases such as “estimate”, “project”, "anticipate", "expect", "intend",

Rock Tech Lithium Inc.

600-777 Hornby Street | Vancouver | British Columbia | Canada | V6Z 1S4

P. +1.778.358.5200 | F. +1.604.670.0033

www.rocktechlithium.com | [email protected]

TSXV: RCK | Frankfurt: RJIB | OTCQX: RCKTF

"believe", "hope", "may" and similar expressions, as well as "will", "shall" and all other indications of future tense. All forward-looking

information set forth in this news release are expressly qualified in their entirety by the cautionary statements referred to in this section.

Forward-looking information is based on certain estimates, expectations, analysis and opinions that are believed by management of Rock Tech to

be reasonable at the time they were made or in certain cases, on third party expert opinions. It should be noted that, in order to achieve its

objectives, Rock Tech will be required to raise additional funding and the availability of financing on satisfactory terms is not guaranteed. This

forward-looking information was derived utilizing numerous assumptions regarding, among other things, the supply and demand for, deliveries

of, and the level and volatility of prices of, intermediate and final lithium products, expected growth, performance and business operation,

prospects and opportunities, general business and economic conditions, results of development and exploration, Rock Tech’s ability to procure

supplies and other equipment necessary for its business, including development and exploration activities. The foregoing list is not exhaustive of

all assumptions which may have been used in developing the forward-looking information. While Rock Tech considers these assumptions to be

reasonable based on information currently available, they may prove to be incorrect. Forward-looking information should not be read as a

guarantee of future performance or results.

In addition, forward-looking information involves known and unknown risks and uncertainties and other factors, many of which are beyond Rock

Tech’s control, that may cause Rock Tech’s actual events, results, performance and/or achievements to be materially different from that which is

expressed or implied by such forward-looking information. Risks and uncertainties that may cause actual events, results, performance and/or

achievements to vary materially include the risk that Rock Tech will not be able to meet its financial obligations as they fall due, changes in

commodity prices, Rock Tech’s ability to retain and attract skilled staff and to secure feedstock from third party suppliers, unanticipated events

and other difficulties related to construction, development and operation of converters and mines, the cost of compliance with current and future

environmental and other laws and regulations, title defects, competition from existing and new competitors, changes in currency exchange rates

and market prices of Rock Tech’s securities, Rock Tech’s history of losses, impacts of climate change and other risks and uncertainties discussed

under the heading "Financial Instruments and Other Risks" in Rock Tech’s most recently filed Management Discussion and Analysis, a copy of

which is filed electronically through SEDAR and is available online at www.sedar.com. Such risks and uncertainties do not represent an

exhaustive list of all risk factors that could cause actual events, results, performance and/or achievements to vary materially from the forward-

looking information.

We cannot assure you that actual events, results, performance and/or achievements will be consistent with the forward-looking information and

management’s assumptions may prove to be incorrect. Our forward-looking information reflects Rock Tech management’s views as at the date

the information is created. Except as may be required by law, Rock Tech undertakes no obligation and expressly disclaims any responsibility,

obligation or undertaking to update or to revise any forward-looking information, whether as a result of new information, future events or

otherwise, to reflect any change in Rock Tech’s expectations or any change in events, conditions or circumstances on which any such information

is based.

The forward-looking information contained herein is presented for the purposes of assisting readers in understanding Rock Tech’s plans,

objectives and goals and is not appropriate for any other purposes.

Given these uncertainties, readers are cautioned not to rely on the forward-looking information set forth in this news release.