Mr. Daniel Earle reports

SOLARIS REPORTS 475M OF 1.03% CUEQ FROM SURFACE IN NEW DRILLING AS FURTHER PRODUCTIVITY GAINS DRIVE RECORD 10KM DRILLED IN AUGUST

Solaris Resources Inc. has released assay results from its continuing 60,000-metre 2024 drilling program that aims to target open extensions of mineralization while upgrading mineral resources and converting waste at its Warintza project in southeastern Ecuador. Highlights are listed below with detailed results in Tables 1 and 2.

Highlights

Drill results continue to build on the 2024 mineral resource estimate (MRE), with this release highlighted by intercepts of high-grade mineralization outside of the MRE in the northwest and southeast sectors. Some of these holes also significantly improve upon modelled grades in sparsely drilled areas.

Northwest sector:

• SLS-100 (drilled southeast): 427 metres of 1.11 per cent CuEq (copper equivalent) within 475 m of 1.03 per cent CuEq from surface;
• SLS-99 (drilled southwest): 105 m of 1.00 per cent CuEq within 246 m of 0.75 per cent CuEq from surface;
• SLS-96 (drilled southeast): 78 m of 0.71 per cent CuEq within 288 m of 0.47 per cent CuEq from surface;
• SLS-97 (drilled west): 75 m of 0.60 per cent CuEq within 308 m of 0.36 per cent CuEq from surface.

Holes SLS-96, SLS-97 and SLS-99 added new high-grade mineralization partially outside of the MRE while SLS-100 improved upon the modelled grade in its vicinity. These holes were located in the northwest sector where mineralization has now been extended to the contact with a tabular granodiorite that shapes the northwestern pit wall. Stepout exploration drilling is now testing the potential for mineralization within a large area of undrilled soil anomaly on the far side of this body.

Southeast sector:

• SLSE-50 (southwest): 84 m of 0.70 per cent CuEq within 445 m of 0.53 per cent CuEq from surface;
• SLSE-45 (drilled east): 285 m of 0.63 per cent CuEq within 399 m of 0.58 per cent CuEq from surface;
• SLSE-47 (drilled southwest): 210 m of 0.58 per cent CuEq within 399 m of 0.42 per cent CuEq from surface;
• SLSE-46 (drilled south): 75 m of 0.73 per cent CuEq within 400 m of 0.34 per cent CuEq from surface.

Holes SLSE-45, SLSE-46, SLSE-47 and SLSE-50 added new high-grade mineralization partially outside of the MRE while SLSE-45 and SLSE-46 improved upon modelled grades in their vicinity. Mineralization remains open to the southeast for approximately 600 m within a large 0.8-kilometre-by-0.8-kilometre soil anomaly that defines the target opportunity in this direction.

New drilling record

Warintza continues to see gains from significant infrastructure investment at site, with the next phase of construction under way. These improvements have supported the project team achieving a new monthly drilling record of 10 km (eight rigs) in August -- well above the prior monthly peak of eight km (12 rigs) set in 2021. The company is now well positioned to exceed the 60,000 m of drilling planned this year.

Technical information and quality control and quality assurance

Sample assay results have been independently monitored through a quality control/quality assurance (QA/QC) program that includes the insertion of blind certified reference materials (standards), blanks and field duplicate samples. Logging and sampling are completed at a secure company facility located on site. Drill core is cut in half on site and samples are securely transported to ALS Labs in Quito. Sample pulps are sent to ALS Labs in Lima, Peru, and Vancouver, Canada, for analysis. Total copper and molybdenum contents are determined by four-acid digestion with AAS finish. Gold is determined by fire assay of a 30-gram charge. In addition, selected pulp check samples are sent to Bureau Veritas lab in Lima, Peru. Both ALS Labs and Bureau Veritas lab are independent of Solaris. Solaris is not aware of any drilling, sampling, recovery or other factors that could materially affect the accuracy or reliability of the data referred to herein. Heliborne magnetic, lidar (light detection and ranging) and other layers of data quality for Warintza district exploration were validated by a qualified external professional using data validation procedures under high industry standards and the company therefore did not require such data to be further verified by a qualified person as defined in National Instrument 43-101 -- Standards of Disclosure for Mineral Projects. The remaining scientific and technical information, including the drill hole data, has been verified by Jorge Fierro, MSc, DIC, PG, using data validation and quality assurance procedures under high industry standards. The verification activities included a search for factual errors, completeness of the lithological and assay data, and suitability of the primary data. As part of the database verification activities, the assay information and certificates obtained directly from the analytical laboratory have been examined as well.

Qualified person

The scientific and technical content of this press release has been reviewed and approved by Jorge Fierro, MSc, DIC, PG, vice-president of exploration of Solaris who is a qualified person as defined in National Instrument 43-101 -- Standards of Disclosure for Mineral Projects. Mr. Fierro is a registered professional geologist through the SME (registered member No. 4279075).

About Solaris Resources Inc.

Solaris is advancing a portfolio of copper and gold assets in the Americas, which includes a world-class copper resource with expansion and discovery potential at its Warintza project in Ecuador; a series of grassroots exploration projects with discovery potential in Peru and Chile; and significant leverage to increasing copper prices through its 60-per-cent interest in the La Verde joint venture project with a subsidiary of Teck Resources in Mexico.

We seek Safe Harbor.