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Avalon commences 2,000 metre drilling program on Separation Rapids Lithium Project, Kenora, Ontario

Exploration Programs

NEWS RELEASE

April 5, 2017 No. 17-06

Avalon commences 2,000 metre drilling program on

Separation Rapids Lithium Project, Kenora, Ontario

Toronto, ON – Avalon Advanced Materials Inc. (TSX: AVL and OTCQX: AVLNF) (“Avalon” or the

“Company”) is pleased to announce that it has commenced a 10 hole, 2,000 metre diamond drilling

program on its 100% owned Separation Rapids Lithium Project (the “Project”) near Kenora, Ontario.

The program is expected to be completed over the next 6-8 weeks, following which an updated

resource estimate will be prepared. The drilling pr ogram has a number of specific objectives

including:

• Expanding the existing mineral resource of lithium (petalite) pegmatite mineralization which

is open along strike and to depth;

• Quantifying the lithium mineralization in the resource model associated with lepidolite and

other lithium micas versus lithium mineralization associated with petalite;

• Testing an undrilled target area 1 kilometre west of the known resource where a showing of

petalite pegmatite sampled by the Company in 1997 yielded 1.56% Li 2O across 8.9 metres;

and

• Collecting geotechnical data for groundwater studies and mine planning in advance of

permitting for site development.

Previous exploration work by Avalon in the 1990’s focused only on recovering the lithium mineral

petalite as an industrial mineral product for glass-ceramics applications and consequently did not

fully account for the lepidolite mineralization in the development model. However, as disclosed in the

Company’s news release dated February 6, 2017 , recent testwork conducted by Lepidico Ltd. of

Perth, Australia (ASX:LPD, “Lepidico”) using its patented L-Max® hydrometallurgical process

technology has successfully produced a battery grade lithium carbonate product from lepidolite

sourced from the Separation Rapids property.

There are sub-zones in the Separation Rapids deposit where the lithium is dominantly contained in

lepidolite, which can be concentrated separately from the petalite. This offers the potential for

production of both a lithium carbonate product from a lepidolite concentrate as well as a lithium

hydroxide product from a petalite concentrate, the latter as contemplated in the Company’s

Preliminary Economic Assessment (“PEA”) , finalized in November, 2016. The current drilling

program will aid in differentiating petalite-dominant versus lepidolite-dominant resources in the block

model and contribute to a revised development model for the Project. An updated PEA reflecting the

new resource, as well as recent progress on process development work, is planned for this summer.

130 Adelaide St. W., Suite 1901, Toronto, ON M5H 3P5

Tel: (416) 364-4938 Fax: (416) 364-5162

[email protected]

www.AvalonAdvancedMaterials.com

2

The technical information included in this news release has been reviewed and approved by the

Company’s Vice President, Exploration, Dr. William Mercer, a Qualified Person under NI 43-101.

About Avalon Advanced Materials Inc.

Avalon Advanced Materials Inc. is a Canadian mineral development company specializing in niche

market metals and minerals with growing demand in new technology. The Company has three

advanced stage projects, all 100%-owned, providing investors with exposure to lithium, tin and

indium, as well as rare earth elements, tantalum, niobium, and zirconium. Avalon is currently

focusing on its Separation Rapids Lithium Project, Kenora, ON and its East Kemptville Tin-Indium

Project, Yarmouth, NS. Social responsibility and environmental stewardship are corporate

cornerstones.

For questions and feedback, please e-mail the Company at [email protected], or phone Don

Bubar, President & CEO at 416-364-4938.

This news release contains “forward-looking statements” within the meaning of the United States Private Securities Litigation R eform Act

of 1995 and applicable Canadian securities l egislation. Forward-looking statements in clude, but are not limited to, statements that the

drilling program is expected to be comple ted over the next 6-8 weeks following whic h an updated resource estimate will be prepa red, that

it will aid in differentiating petalite-dominant versus lepido lite-dominant resources in the block model and contribute to a re vised

development model for the Project, that there may be the potentia l for production of both a lithium carbonate product from a le pidolite

concentrate as well as a lithiu m hydroxide product from a petalite concentrate and that an updated PEA reflecting the new resou rce as

well as recent progress on process development is planned for this summer . Generally, these forward-looking statements can be

identified by the use of forward-looking terminology such as “potential”, “scheduled”, “anticipates”, “continues”, “expects” or “does not

expect”, “is expected”, “scheduled”, “targeted”, “planned”, or “believes”, or variations of such words and phrases or state tha t certain

actions, events or results “may”, “could”, “would”, “might” or “will be” or “will not be” taken, reached or result, “will occur” or “be achieved”.

Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause the actual re sults,

level of activity, performance or achievements of Avalon to be materially different from those expressed or implied by such forward-looking

statements. Forward-looking statements are based on assumptions management believes to be reasonable at the time such statement s

are made. Although Avalon has attempted to identify important fact ors that could cause actual results to differ materially from those

contained in forward-looking statements, there may be other factors that cause results not to be as anticipated, estimated or i ntended.

Factors that may cause actual results to differ materially fr om expected results described in forward-looking statements includ e, but are

not limited to market conditions, Avalon’s ability to secure su fficient financing to advance and complete the Project, uncertai nties

associated with securing the necessary approvals and permits in a timely manner, assump tions used in the PEA proving to be inac curate,

uncertainties associated with Avalon’s resource and reserve estimates, uncertainti es regarding global supply and demand for lit hium and

feldspar and market and sales prices, uncertainties associated with securing off-take agreements and customer contracts, uncert ainties

with respect to social, community and envir onmental impacts, uncertainties with respec t to optimization opportunities for the P roject as

well as those risk factors set out in the Company’s current Annual Information Form, Management’s Discussion and Analysis and o ther

disclosure documents available under the Company’s profile at www.SEDAR.com. There can be no assurance that such statements will

prove to be accurate, as actual results and future events could di ffer materially from those anticipated in such statements. Su ch forward-

looking statements have been provided for the purpose of assist ing investors in understanding the Company’s plans and objective s and

may not be appropriate for other purposes. Accordingly, readers should not place undue reliance on forward-looking statements. Avalon

does not undertake to update any forward-looking statements that ar e contained herein, except in accordance with applicable sec urities

laws.