Mr. Robert MacDonald reports

LITHIUM ASSAY RESULTS RETURNED FROM STEP-OUT WINTER 2023 DRILL PROGRAM AS ROCK TECH INITIATES SUMMER FIELD EXPLORATION AT GEORGIA LAKE

Rock Tech Lithium Inc. has received positive assay results from its 2023 winter drill program. The completed stepout drilling aims to support the expansion of known pegmatite zones at its 100-per-cent-owned Georgia Lake lithium project in the Thunder Bay mining district of Ontario.

Rock Tech has completed the drilling of 17 exploration holes for a total of 3,676 metres in the first months of 2023 at the Main Zone North (MZN) and McVittie deposits. It has received assay results for 10 holes drilled around MZN and seven holes that were drilled at McVittie (refer to attached results).

Commenting on the drill program, Robert MacDonald, general manager of the Georgia Lake project, said: "Rock Tech is pleased to have been able to follow up on our 2021-2022 drill results from the MZN and past results from McVittie. Positive results obtained further support the strength of the deposits and extends our understanding of the known pegmatites. We are currently preparing to follow up with a summer field program and get boots on the ground to support our commitment to our total land package at Georgia Lake."

Key exploration highlights:

• Ten NQ diamond drill holes totalling 2,115 metres were completed at the MZN deposit. Highlights of assay results from the 10 holes at MZN include:
  • NC-23-01: 3.2 metres (true width) at 0.87 per cent lithium oxide starting from 57.1 m;
  • NC-23-02: 3.5 m (true width) at 1.07 per cent Li2O starting from 103.0 m;
  • NC-23-03: 4.0 m (true width) at 1.08 per cent Li2O starting from 162.3 m;
  • NC-23-06: 4.9 m (true width) at 0.73 per cent Li2O starting from 67.6 m;
  • NC-23-07: 7.7 m (true width) at 0.71 per cent Li2O starting from 59.6 m;
  • NC-23-07: 4.3 m (true width) at 1.42 per cent Li2O starting from 139.9 m;
  • NC-23-08: 3.1 m (true width) at 1.19 per cent Li2O starting from 7.1 m;
  • NC-23-09: 2.5 m (true width) at 0.92 per cent Li2O starting from 117.8 m.
• Seven NQ diamond drill holes totalling 1,561 metres were completed at McVittie. Assay results include:
  • MV-23-01: 6.4 m (downhole width) at 0.93 per cent Li2O starting from 107.4 m;
  • MV-23-03: 2.1 m (downhole width) at 1.30 per cent Li2O starting from 95.6 m;
  • MV-23-05: 2.7 m (downhole width) at 1.66 per cent Li2O starting from 59.05 m.

Rock Tech intends to increase mineral resources at the Georgia Lake project during 2023 and 2024 through a set of phased exploration programs. The first phase of this commitment has been the completion of the winter drill program at MZN and McVittie.

Rock Tech is also pleased to announce that it has initiated an extensive summer exploration program (phase 2) that will focus on prospecting, mapping and sampling around high-priority targets. The work will be followed by trenching and channel sampling on select prospects in both the northern spodumene pegmatite area (NSPA) and the southern spodumene pegmatite area (SSPA).

This work will follow up on the positive results of the 2022 field program (see Rock Tech's press release dated Jan. 31, 2023), which sampled pegmatite prospects in close proximity to Rock Tech's National Instrument 43-101-compliant mineral resources. The results from phase 2 are expected to generate additional drill targets for a fall 2023 drill program (phase 3).

The Georgia Lake project, located between Nipigon and Beardmore, Ont., is composed of 1,042 hectares of mineral leases and 5,686 hectares of mineral claims.

Sampling and quality assurance/quality control procedure

Samples were taken across every spodumene-bearing pegmatite and one metre into the barren host rock on either side of pegmatite dikes. Sample lengths are generally around one metre, although individual sample length can be determined based on internal zoning of the dikes and the locations of their contacts. Core to be sampled was cut in half with one-half being sent for analysis and the other half remaining in the box for reference. All core is stored at Rock Tech's core facility in Beardmore, Ont. Each sample was put into its own plastic sample bag with a sample tag and closed with zip ties. Sixteen per cent of the samples that were submitted to Activation Laboratories Ltd. for analysis were QA/QC samples. QA/QC samples were inserted into the sample stream and consist of high- and low-grade lithium standards, blank material, and duplicates. Samples were dropped at Actlabs' preparation laboratory in Thunder Bay, Ont., for crushing and pulverizing, and subsequently were sent to Actlabs' geochemistry laboratory in Ancaster, Ont., for analysis of 41 elements using fusion plus ICP-OES or ICP-MS. Sodium peroxide fusion plus ICP-OES was used to analyze for lithium. Actlabs is independent of the company.

Scientific and technical disclosure

The scientific and technical disclosure included in this news release has been reviewed and approved by Jessica Daniel, PGeo, consulting geologist for the Georgia Lake project, a qualified person under National Instrument 43-101 (Standards of Disclosure of Mineral Projects). Exploration data were collected and verified following the guidelines outlined in CIM (Canadian Institute of Mining, Metallurgy and Petroleum) Mineral Exploration Best Practice Guidelines.

About Rock Tech Lithium Inc.

Rock Tech is a cleantech company with operations in Canada and Germany on a mission to produce lithium hydroxide for electric vehicle batteries. The company plans to build lithium converters at the doorstep of its customers and to guarantee supply chain transparency and just-in-time delivery, beginning with the company's proposed lithium hydroxide merchant converter and refinery facility in Guben, Germany. To close the most pressing gap in the clean mobility story, Rock Tech has gathered one of the strongest teams in the industry. The company has adopted strict environmental, social and governance standards, and is developing a proprietary refining process aimed at further increasing efficiency and sustainability. Rock Tech plans to source raw material from its wholly owned Georgia Lake spodumene project located in the Thunder Bay mining district of Ontario, Canada, as well as procuring it from other responsibly producing mines. In the years to come, the company expects to also source raw material from discarded batteries. Rock Tech's goal is to create a closed-loop lithium production system.

We seek Safe Harbor.