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Sign Letter of Intent for IXOS® Mining Technology Trials

Corporate Updates

NOT FOR DISTRIBUTION IN THE U.S. OR OVER U.S. NEWSWIRES

Rio2 Limited and Sixth Wave Innovations Inc.

Sign Letter of Intent for IXOS® Mining Technology Trials

Halifax, Nova Scotia/ Vancouver, BC – (September 15, 2020) – Sixth Wave Innovations Inc.

(CSE:SIXW) (OTCQB:ATURF) (FSE:AHUH) (“ Sixth Wave ”) and Rio2 Limited (“ Rio2”)

(TSXV:RIO) (OTCQX: RIOFF) (BVL: RIO) are pleased to announce that they have executed a

non-binding Letter of Intent (“ LOI”) for the trialing of Sixth Wave’s patented IXOS ® purification

polymer (the “IXOS® Mining Technology”) for Rio2’s Fenix Gold Project in Chile.

Under the terms of the LOI, Rio2 will send representative ore samples from its Fenix Gold Project

to Sixth Wave for testing and analysis in its Salt Lake City facility. Sixth Wave will perform a

combination of leaching and recovery tests using its IXOS ® Mining Technology on these samples

consistent with protocols for the expect ed heap leach mining activity planned for the Fenix Gold

Project. Upon completion of the testing, to be performed in October of this year, and pending

positive results, the two companies will work to negotiate a definitive agreement to proceed to a

complete on-site pilot Adsorption/Desorption/Recovery (ADR) plant scaled to operate on a 400t

pilot leach pad.

The objective of this work, from Rio2’s perspective, is to determine whether Sixth Wave’s IXOS®

Mining Technology can be successfully applied to enhance the extraction of gold from Fenix Gold

ore by using molecularly imprinted polymers rather than traditional carbon for the gold adsorption

process. If successful, the application of the IXOS ® Mining Technology is expected to result in a

reduction of capex and opex related to the gold extraction process.

Upon successful completion and positive results of the pilot program, the companies would then

move to an implementation phase incorporating the IXOS ® Mining Technology in the actual

processing plant to be constructed at the Fenix Gold Project.

“We are very excited about this project and working with Rio2. The IXOS ® process should excel

in comparison to traditional activated carbon because of the high rejection of base metal and

scaling and the smaller process plant required for IXOS®. Substantially lower power consumption

in the desorption and recovery stages and no need for regeneration will also play a large role in

reduced opex,” noted Dr. Jon Gluckman, President and CEO of Sixth Wave Innovations Inc. He

went on to say, “It is exciting to be involved with Rio2 at this phase of the Fenix Gold Project as it

allows us the ability to optimize the design of the ADR circuit without having to worry about retrofit

constraints.”

“Rio2 is always looking to embrace and trial new technology with the objective of bringing

enhanced value to our stakeholders through the reduced capex/opex opportunities that innovative

technologies can bring. The Fenix Gold Project is currently the largest undeveloped gold heap

leach project in the Americas and we look forward to working alongside Sixth Wave during the

development phase of the project,” stated Mr. Alex Black, President and CEO of Rio2 Limited.

About RIO2 Limited

Rio2 is a mining company with a focus on devel opment and mining operations with a team that

has proven technical skills as well as a successful capital markets track record. Rio2 is focused

on taking its Fenix Gold Project in Chile to production in the shortest possible timeframe based

on a staged development strategy. In addition to the Fenix Gold Project in development in Chile,

Rio2 Limited continues to pursue additional strategic acquisitions where it can deploy its

operational excellence and responsible mining practices to build a multi-asset, multi-jurisdiction,

precious metals company focused in the Americas.

To learn more about Rio2 Limited, please visit: www.rio2.com or Rio2's SEDAR profile at

www.sedar.com.

ON BEHALF OF THE BOARD OF RIO2 LIMITED

Alex Black

President, CEO & Director

Email: [email protected]

Tel: 1 (604) 260-2696

About Sixth Wave

Sixth Wave is a development stage nanotechnology company with patented technologies that

focus on extraction, purification, and detection of target substances at the molecular level using

highly specialized Molecularly Imprinted Polymers (MIPs). The Company is in the process of

commercializing its, IXOS®, a line of extraction polymers for the gold mining industry.

Sixth Wave can design, develop and commercialize MIP solutions across a broad spectrum of

industries. The company is focused on nanotechnology architectures that are highly relevant for

detection, purification, and separation of viruses, biogenic amines and other pathogens, and

nutraceuticals for which the Company has products at various stages of development.

For more information about Sixth Wave, please visit our web site at: www.sixthwave.com

ON BEHALF OF THE BOARD OF DIRECTORS

“Jon Gluckman”

Jonathan Gluckman, Ph.D., President & CEO

For information, please contact the Company:

Phone: (801) 582-0559

E-mail: [email protected]

Forward-Looking Statements

This press release contains forward-looking statements and forward-looking information

(collectively “forward-looking information”) within the meaning of applicable securities laws,

including statements regarding Rio2’s planned development of its Fenix Gold Project, other

aspects of Rio2’s anticipated future operations and plans, and the testing and performance of

Sixth Wave’s IXOS® Mining Technology.

All statements included herein, other than statements of historical fact, may be forward-looking

information and such information involves various risks and uncertainties. Forward-looking

information is often, but not always, identified by the use of words such as “seek”, “anticipate”,

“plan”, “continue”, “estimate”, “expect”, “may”, “will”, “project”, “predict”, “potential”, “targeting”,

“intend”, “could”, “might”, “should”, “believe”, and similar expressions. The forward-looking

information is based on certain key expectations and assumptions made by management of Rio2

and Sixth Wave, including but not limited to: expectations concerning prevailing commodity prices,

exchange rates, interest rates, applicable royalty rates and tax laws; capital efficiencies;

legislative and regulatory environment of Chile; future production rates and estimates of capital

and operating costs; estimates of reserves and resources; anticipated timing and results of capital

expenditures; the sufficiency of capital expenditures in carrying out planned activities;

performance; the availability and cost of financing, labor and services; and Rio2’s ability to access

capital on satisfactory terms.

Rio2 and Sixth Wave believe the expectations reflected in these forward-looking statements are

reasonable, but no assurance can be given that these expectations will prove to be correct and

such forward-looking statements in this press release should not be unduly relied upon. A

description of assumptions used to develop such forward-looking information and a description of

risk factors that may cause actual results to differ materially from forward-looking information can

be found in disclosure documents of both Rio2 and Sixth Wave on the SEDAR website at

www.sedar.com or the websites of Rio2 ( www.rio2.com) and Sixth Wave ( www.

www.sixthwave.com), respectively. In particular, successful commercial deployment of the IXOS®

technology is subject the risk that the technology may not prove to be successful in achieving

sufficient environmental or production efficiencies, uncertainty of timing or availability of required

regulatory approvals, lack of track record of developing products for mining applications and the

need for additional capital to carry out product development activities. Forward-looking statements

included in this press release are made as of the date of this press release and such information

should not be relied upon as representing its views as of any date subsequent to the date of this

press release. Rio2 and Sixth Wave have attempted to identify important factors that could cause

actual results, performance or achievements to vary from those current expectations or estimates

expressed or implied by the forward-looking information. However, there may be other factors

that cause results, performance or achievements not to be as expected or estimated and that

could cause actual results, performance or achievements to differ materially from current

expectations. Rio2 and Sixth Wave disclaim any intention or obligation to update or revise any

forward-looking statements, whether as a result of new information, future events or otherwise,

except as expressly required by applicable securities legislation.

This press release does not constitute an offer to sell or a solicitation of an offer to buy any of the

securities in the United States. The securities have not been and will not be registered under the

United States Securities Act of 1933, as amended (the “ U.S. Securities Act ”) or any state

securities laws and may not be offered or sold within the United States or to U.S. Persons unless

registered under the U.S. Securities Act and applicable state securities laws or an exemption from

such registration is available. Not for distribution to U.S. Newswire Services or for dissemination

in the United States. Any failure to comply with this restriction may constitute a violation of U.S.

Securities laws.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in

the policies of the TSX Venture Exchange) accepts the responsibility for the adequacy or accuracy

of this release.