Purebase Receives ASTM Certification for New HP-SCM

Has Technical Ability To Replace up to 40% of Cement

IONE, CA, October 23rd, 2020 (GLOBE NEWSWIRE) — Purebase Corporation (OTCQB: PUBC), a diversified resource company, headquartered in Ione, California, today announces its new natural pozzolan product, HP-SCM, had  successfully completed ASTM C618 and AASHTO M295 compliance testing at an accredited concrete lab.

This high-performance Supplementary Cementitious Material (SCM) has been developed to not only replace fly ash and slag in concrete mix designs but is also a high-end pozzolanic replacement for cement (anywhere from 20% – 40%).  Compressive strengths of concretes incorporating HP-SCM can exceed the strength of typical straight cement mixes at 28 days, which is not typical of an SCM.

Cement can be replaced at up to 40% with HP-SCM without sacrificing performance while significantly reducing the carbon footprint of the concrete.  Cement is a notable contributor to harmful greenhouse gas emissions, so reducing the amount of cement in concrete is increasingly becoming a goal of many countries around the world, as well as many municipal jurisdictions within the U.S.  Purebase is currently working with research laboratories to quantify the amount of carbon reduction of HP-SCM.

Purebase President and CEO Scott Dockter stated, “Purebase has taken a major step in creating a product that is vital to the construction industry that will help reduce greenhouse gas emissions.”  He further added, “We have submitted our materials to the California Department of Transportation to get our HP-SCM on the Approved Material List, and we anticipate having more news on this front in the near-term.”

About Purebase Corporation

Purebase Corporation (OTCQB: PUBC) is a diversified resource company that acquires, develops, and markets minerals for use in the agriculture, construction, and other specialty industries.

Contacts

David Harvey | Purebase Corporation

david.harvey@purebase.com, and please visit our corporate website and subscribe to our upcoming Newsletter – www.purebase.com/newsletter

Safe Harbor

This press release contains statements, which may constitute “forward-looking statements” within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. Those statements include statements regarding the intent, belief, or current expectations of Purebase Corporation and members of its management team as well as the assumptions on which such statements are based. Such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those contemplated by such forward-looking statements. Important factors currently known to management that may cause actual results to differ from those anticipated are discussed throughout the Company’s reports filed with Securities and Exchange Commission which are available at www.sec.gov as well as the Company’s web site at www.purebase.com. The Company undertakes no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or changes to future operating results.

Purebase Enhances Its Board of Advisors with An Expert on Machine Learning and Cheminformatics

IONE, CA, October 13, 2020 – Purebase Corporation (OTCQB: PUBC), a diversified resource company, headquartered in Ione, California, today announces that Dr. Newell Washburn, PhD, whom is an expert on machine learning and cheminformatics applied to complex materials applications has agreed to join the Purebase Advisory Board.

Dr. Washburn joins Dr. Karen Scrivener, PhD, Dr. Kimberly Kurtis, PhD, and Mr. Joe Thomas as part of the Purebase Advisory Board team that will provide expert guidance in the development and execution of Purebase’s rollout of next-generation, carbon emission reducing, supplementary cementitious materials (SCMs).

Purebase’s Chairman and CEO, Scott Dockter stated, “We look forward to Dr. Washburn joining our team. He will be an asset and great resource as his primary focus is the use of data-driven approaches to formulate cementitious binders with high SCM content and to design chemical admixture systems for the broad deployment.  In addition, his partnering with a broad range of chemical admixture and cement companies and the ARPA-E program in the Department of Energy. We are looking forward to working with him.”

Newell R. Washburn, PhD is Associate Professor of Chemistry and Engineering at Carnegie Mellon University and CEO of Ansatz AI.  Professor Washburn co-founded Ansatz AI to commercialize the hierarchical machine learning algorithm he and his collaborators developed at CMU for modeling and optimizing complex material systems based on sparse datasets. The company is currently working with clients in the US, Europe, and Japan on using chemical and materials informatics in product development and manufacturing.  Professor Washburn received a BS in Chemistry from the University of Illinois at Urbana-Champaign, performed doctoral research at the University of California (Berkeley) on the solid state chemistry of magnetic metal oxides, and then did post-doctoral research in chemical engineering at the University of Minnesota (Twin Cities).

About Purebase Corporation

Purebase Corporation (OTCQB: PUBC) is a diversified resource company that acquires, develops, and markets minerals for use in the agriculture, construction, and other specialty industries.

Contacts

Emily Tirapelle | Purebase Corporation

emily.tirapelle@purebase.com, and please visit our corporate website – www.purebase.com

Safe Harbor

This press release contains statements, which may constitute “forward-looking statements” within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. Those statements include statements regarding the intent, belief, or current expectations of Purebase Corporation and members of its management team as well as the assumptions on which such statements are based. Such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those contemplated by such forward-looking statements. Important factors currently known to management that may cause actual results to differ from those anticipated are discussed throughout the Company’s reports filed with Securities and Exchange Commission which are available at www.sec.gov as well as the Company’s web site at www.purebase.com. The Company undertakes no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or changes to future operating results.

Purebase Strengthens Its Board of Advisors With Addition Of Globally Recognized Expert In SCM

IONE, CA, September 29th, 2020 – Purebase Corporation (OTCQB: PUBC), a diversified resource company, headquartered in Ione, California, today announces that Dr. Karen Scrivener, PhD, one of the world’s leading experts in material science, construction materials, and low carbon cement, has agreed to join the Purebase Advisory Board. 

Dr. Scrivener joins Dr. Kimberly Kurtis, PhD, and Mr. Joe Thomas as part of the Purebase Advisory Board team that will provide expert guidance in the development and execution of Purebase’s rollout of next-generation, carbon emission reducing, supplementary cementitious materials (SCMs).

Purebase’s Chairman and CEO, Scott Dockter stated, “Dr. Scrivener is a world-renowned expert in sustainable cement, and she’s been part of introducing new construction materials into various countries, including Colombia, India and others.  We are looking forward to working with her to do that here in the United States.”  Mr. Dockter further added, “We see this as a next step towards our goals of becoming a leader in helping to fight carbon emissions in the materials and construction markets.”

About Dr. Karen Scrivener, PhD

Dr. Scrivener graduated from Cambridge University in Materials Science and earned her PhD in Materials Science from Imperial College London. She has conducted pioneering research into sustainable cements for academic and industrial partners around the world and has received numerous awards and honors. She is a Fellow of the Royal Academy of Engineering in the UK and is an Honorary Fellow of the Institute of Concrete Technology.  She also developed the LC3 project (Limestone Calcined Clay Cement) to produce a low-cost, low-carbon cement to address the negative effects of cement production on global air pollution. This LC3 cement is currently being used in several countries around the world with great success.

About Purebase Corporation

Purebase Corporation (OTCQB: PUBC) is a diversified resource company that acquires, develops, and markets minerals for use in the agriculture, construction, and other specialty industries.

Contacts

David Harvey | Purebase Corporation

david.harvey@purebase.com, and please visit our corporate website – www.purebase.com

Safe Harbor

This press release contains statements, which may constitute “forward-looking statements” within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. Those statements include statements regarding the intent, belief, or current expectations of Purebase Corporation and members of its management team as well as the assumptions on which such statements are based. Such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those contemplated by such forward-looking statements. Important factors currently known to management that may cause actual results to differ from those anticipated are discussed throughout the Company’s reports filed with Securities and Exchange Commission which are available at www.sec.gov as well as the Company’s web site at www.purebase.com. The Company undertakes no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or changes to future operating results.

Purebase Receives ASTM Certifications For New Eco-Friendly, Next-Gen SCMs

IONE, CA, September 9^th, 2020 (GLOBE NEWSWIRE) — Purebase Corporation (OTCQB: PUBC), a diversified resource company, headquartered in Ione, California, today announces several updates to its production of next-generation, carbon-reducing supplementary cementing materials (SCMs).

Recent ASTM Certification for Purebase eMK-25

For the last two years, Purebase has been developing SCMs with industry experts and universities to address the issue of excessive greenhouse gas emissions in the production of cement.  In April 2020, Purebase’s eMK-25, received two certifications from an accredited lab based on the American Society for Testing and Materials (ASTM).  Specifically, the certifications ASTM C618 and ASTM C1567.  This milestone marks a major step towards commercialization for eMK-25 to be used in all cement mixes.

 Significant Greenhouse Emissions Reductions

The cement industry currently represents 8% of the world’s annual carbon dioxide (CO2) emissions, and for every ton of cement pro­duced, approximately one ton of carbon is added to the earth’s atmosphere. 

Purebase’s eMK-25 can help reduce this emission significantly because it is a natural pozzolan that requires significantly less energy needed to produce regular cement.  When cement is replaced with eMK-25, there is an immediate reduc­tion of the amount of greenhouse gas (carbon footprint) produced.

A Changing Regulatory Environment in the U.S. West

In November 2019, Marin County, California became the first county in the United States to require that all construction projects in development within the city and county of Marin use a “low carbon concrete”.  Other municipalities that are considering or enacting low carbon concrete requirements include the cities of Portland (Oregon), Alameda (California), Berkeley (California), and San Francisco (California).

Within the Marin County low carbon concrete code is the regulation of the Upfront Embodied Carbon, which measures the greenhouse gases emitted during the material extraction, transportation and manufacturing of the concrete.  Because Purebase has access to certain resources in the State of California that are not available to competitors, it may have a lower Upfront Embodied Carbon as defined by Marin County’s code, which could be an important logistical advantage for Purebase, as new regulations get passed throughout the Western United States. 

Purebase’s President and CEO, Scott Dockter stated, “Getting ASTM Certifications is a major step towards getting our new SCMs into the West Coast markets, but we’re developing new SCMS as well.”  He further added, “In August, we completed trials on a second SCM that is targeting a different segment of the concrete industry. This second SCM is currently at an independent third party lab for certification based on ASTM standards, and we hope to have certification by mid-October.”

 About Purebase Corporation

Purebase Corporation (OTCQB: PUBC) is a diversified resource company that acquires, develops and markets minerals for use in the agriculture, construction and other specialty industries.

Contacts

David Harvey | Purebase Corporation

david.harvey@purebase.com, and please visit our corporate website and subscribe to our upcoming Newsletter – www.purebase.com/newsletter

Safe Harbor

This press release contains statements, which may constitute “forward-looking statements” within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. Those statements include statements regarding the intent, belief, or current expectations of Purebase Corporation and members of its management team as well as the assumptions on which such statements are based. Such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those contemplated by such forward-looking statements. Important factors currently known to management that may cause actual results to differ from those anticipated are discussed throughout the Company’s reports filed with Securities and Exchange Commission which are available at www.sec.gov as well as the Company’s web site at www.purebase.com. The Company undertakes no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events, or changes to future operating results.

Purebase Gets (C618) And (C1567) Certification On New SCM Product

IONE, CA, July 10, 2020 (GLOBE NEWSWIRE) — Purebase Corporation (OTCQB: PUBC), a diversified resource company, headquartered in Ione, California, today announces that its Supplementary Cementitious Material (SCM) product in development significantly out-performs the minimum standards for ASTM C618 certification. It is a natural material which meets or exceeds the Class N specifications for cement and has been certified by CTL Thompson, Inc. in Denver, Colorado, an accredited independent laboratory.

The test specifications included testing its chemical composition, physical fineness, strength, and drying shrinkage. Purebase’s SCM significantly outperforms the minimum standards required for ASTM C618 certification and also earned the ASTM C1567 certification.

The ASTM C1567 testing showed that the Purebase SCM product delivered less than 0.01% expansion, which is lower than what is required. California Department of Transportation (CA-DOT) test methods were used, and the product was highly effective at mitigating reactive aggregates in concrete or mortar.

These certifications are important because the vast majority of public and private construction agencies require ASTM-certified materials for their projects.

Purebase’s Advisory Board Member and cement industry expert, Joseph Thomas, stated, “The test results are exactly what we expected from this proprietary blend. This SCM product will be a viable replacement for fly ash and has many ecological and financial benefits for the cement industry.”

About Purebase Corporation

Purebase Corporation (OTCQB: PUBC) is a diversified resource company that acquires, develops, and markets minerals for use in the agriculture, construction and other specialty industries.

Contact : Emily Tirapelle | Purebase Corporation

emily.tirapelle@purebase.com, and please visit our corporate website and subscribe to our upcoming Newsletter – www.purebase.com/newsletter

Safe Harbor:

This press release contains statements, which may constitute “forward-looking statements” within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. Those statements include statements regarding the intent, belief, or current expectations of Purebase Corporation and members of its management team as well as the assumptions on which such  statements are based. Such forward-looking statements are not guarantees of future performance and involve  risks and uncertainties, and that actual results may differ materially from those contemplated by such forward- looking statements. Important factors currently known to management that may cause actual results to differ from those anticipated are discussed throughout the Company’s reports filed with Securities and Exchange Commission which are available at www.sec.gov as well as the Company’s web site at www.purebase.com. The Company undertakes no obligation to update or revise forward-looking statements to reflect changed assumptions, the

occurrence of unanticipated events or changes to future operating results.