Avalon Advanced Materials further crosses 1.54% Li2O over 136.95 metres at Big Whopper Deposit, Separation Rapids JV

Toronto, Ontario–(Newsfile Corp. – August 19, 2024) – Avalon Advanced Materials Inc. (TSX: AVL) (OTCQB: AVLNF) (“Avalon” or the “Company”)in collaboration with its Joint Venture (“JV”) partner SCR-Sibelco NV (“Sibelco“), is pleased to report the second and final batch of drill results from the 2024 winter drilling campaign (which comprised a total of 10 holes) at the Separation Rapids Project in Kenora, Ontario (the “Project”). See Figure 1. The 2024 winter drilling campaign was conducted by the Joint Venture Company Separation Rapids Ltd., which is 60% owned by Sibelco and 40% owned by Avalon.

The results represent 199 assay results from 5 diamond drill holes completed as part of the 2024 expansion and infill drilling campaign at the current 750m Big Whopper Deposit (see Figure 2). The drilling program was designed to upgrade the 2023 Mineral Resource Estimation classification and expand the mineral resource base.