Avalon Advanced Materials Inc. — Proxy Solicitation & Information Statement 2020

Jan 24, 2020

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TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

January 23, 2020

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: AVALON ADVANCED MATERIALS INC

We are pleased to confirm that copies of the following proxy-related materials were mailed on January 23, 2020 to the Registered Securityholders and the Non-Objecting Beneficial Owners ("NOBO"):

• 1 Proxy with Notice-and-Access Notice and Request for Financial Statements - Registered Securityholders

• 2 Voting Instruction Form with Notice-and-Access Notice and Request for Financial Statements - NOBOs

• 3 Notice of Meeting Combined with Information Circular - NOBOs Requesting Full Package

• 4 Notice of Meeting and Management Information Circular (Including Financial Statements and MD & A) - Registered Securityholders

• 5 Proxy Return Envelope

Yours truly,

TSX Trust Company

''Lori Winchester''

Senior Relationship Manager Lori.Winchester@tmx.com

VANCOUVER

650 West Georgia Street, Suite 2700 Vancouver, BC V6B 4N9

T 604 689-3334

CALGARY

300-5th Avenue SW, 10th floor Calgary, AB T2P 3C4

T 403 218-2800

TORONTO

301 - 100 Adelaide Street West Toronto ON M5H 4H1 Toll Free 1-866-600-5869 T 416 361-0930

MONTRÉAL

1800 - 1190, avenue des Canadiens-de-Montréal, C. P. 37 Montréal (Québec) H3B 0G7

T 514 395-5964