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FL.V ·

Frontier Lithium Expands Eastern Extension of the PAK Deposit Intersecting a Low-Iron Intercept of 2.47% Li2O over 119 metres

Drill Results

General Offi ce

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Frontier Lithium Expands Eastern Extension of the PAK Deposit

Intersecting a Low-Iron Intercept of 2.47% Li2O over 119 metres

HIGHLIGHTS

• DDH PL-027-17 intersected 118.9 m of pegmatite averaging 2.47% Li2O from 237.3 to 356.0 m

representing a true width of 55.7 m with a low-iron lithium enriched zone

(Lower - Upper Intermediate Zone)

• DDH PL-027-17 includes 3.30% Li2O over 53 m from 287 to 340 m representing a true width

of 25.0 m (Figure 1);

• DDH PL-027-17 includes a high-grade Lithium zone (Upper Intermediate Zone) of 14 m

averaging 4.41% Li2O from 290.0 to 304.0 m representing a true width of 6.6 m;

• Based on this recent drill result, a Pre-Feasibility Study (PFS) originally scheduled to be completed

by mid-December will now include an updated resource estimate and an

underground component which will be released in early 2018, and;

• Mineralization remains open to depth and along strike to the northwest and the grade thickness is

increasing to the east-south-east (down-plunge).

Sudbury, Ontario, December 6, 2017 – Frontier Lithium Inc. (TSX.V: FL) (the “Company) is pleased

to announce the results of an exploration hole that was drilled after the completion of the 2017 geotechnical/

geomechanical drill program. Diamond drill hole PL-27-17 was designed to step back and test the width and

attitude of the pegmatite zone from the footwall (metasediment side) through to the hanging wall (granite side)

on the down-plunge extension of the deposit. The assay and collar data for the hole reported is presented in

Table I and Table II respectively.

General Offi ce

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Table I – Collar Location and Assay Information

Table II - Collar Locations for Diamond Drill Hole

(1) The intervals in Table I are drill intersection widths. The “true width” is based on overwhelming evidence that the orientation of the pegmatite is sub-vertical.

(2) Li2O content in the Li enriched zones is predominantly associated with spodumene.

Figure 1 shows the split core in the core shack showing the white low-iron spodumene enriched zones in hole DDH PL-027-17.

General Offi ce

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Due Diligence

All scientifi c and technical information in this release has been reviewed and approved by Garth Drever,

P.Geo., the qualifi ed person (QP) under the defi nitions established by National Instrument 43-101. Under

Frontier’s QA/QC procedures, the diamond drill contract specifi ed NQ-sized drill core providing a 47.6 mm

diameter sample. Drill hole PL-027-17 was oriented perpendicular to the strike of the pegmatite and drilled

continuously across it. Sample security and chain of custody started with the removal of core from the core

tube and boxing of drill core at the drill site. The boxed core remained under the custody of the drill contractor

until it was transported from the drill to the secure on-site Core Shack facility by either the drill contractor or one

of the Company’s designated personnel. At the on-site Core Shack, core boxes were opened and inspected

to ensure correct boxing and labelling of the core by the drill contractor, photographed and then re-closed. The

company geologists geologically logged and marked the core for sampling before it was photographed. Each

core sample was assigned a tag with a unique identifying number. Sample lengths are typically one meter,

but can be less depending on zone mineralogy and boundaries. Core marked for sampling was split using

a diamond core saw on site and cut lengthwise into equal halves. Half of the core was sent to an analytical

laboratory for quantitative analysis of select elements. The remaining half of the core is retained and replaced

in the core box. All core remains securely in a locked sea-container on site.

All samples were assayed by AGAT Laboratories Ltd. (“AGAT”), an ISO accredited laboratory in

Mississauga, Ontario. Sample blanks along with tantalum, lithium, rubidium and cesium certifi ed reference

material was routinely inserted into the sample stream in accordance with industry recommended practices.

Field duplicate samples were also taken in accordance with industry recommended practices.

Figure 1: Photo of high-grade lithium intersection from Hole

PL-027-17 (255m to 355m)

“We are extremely pleased with the results from this drill hole

as it lies down-plunge of the open-pit shell currently being

used in the PFS study underway on the deposit and displays

that the grade is persisting with depth with true widths of up

to 55 metres with little in the way of contaminants or potential

mining dilution”, commented Garth Drever, VP Exploration

of Frontier Lithium. “These material facts have imposed an

update to the resource model and also has prompted Frontier

to include a low-cost, bulk underground mining component

to the PFS, all of which is underway and expected to be

announced now in early 2018. The predictability, along

with the high-grade thicknesses intersected to date, and

mineralization that remains open to depth and along strike,

suggests this pegmatite could be signifi cantly more robust

than is currently known.” Frontier is currently planning for

2018 exploratory diamond drilling to further increase the

resource size.

- 30 -

General Offi ce

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

About Frontier Lithium Inc.

Frontier’s goal is to become a low-cost, fully integrated lithium and tantalum producer through development

of the PAK lithium deposit in Ontario, Canada. Frontier maintains a tight share structure with management

ownership exceeding 30% of the Company. CAD $7 million of work has been conducted from 2013 to 2017 on

the deposit which boasts its lithium in a rare, high-purity, low-iron spodumene. The initial target market is the

glass-ceramic industry which consumes roughly one-third of global lithium supply and is currently faced with

monopolistic conditions, coupled with major lithium producers increasingly directing output toward supporting

battery manufacture.

Ceramic/glass customers prefer to source technical-grade (low-iron) spodumene concentrate in excess of

7% lithium oxide (Li2O), if available, to avoid lower grade petalite concentrates, or paying much higher prices

for battery grade lithium compounds.

The PAK lithium deposit remains open in all directions and Company Management is working towards

developing a viable operation. The Company is currently conducting a pre-feasibility study to assess the

economic viability and technical feasibility of producing lithium concentrates. Frontier’s goal is to fi rst establish

a viable technical grade spodumene concentrate operation. A possible second stage of investment and longer

term prospect is to further process some of PAK’s output to produce the higher purity lithium compounds

required for lithium battery technologies used in the electrifi cation of transportation and electric grid

storage applications.

About the PAK Lithium Project

The PAK Lithium Project lies close to the boundary between two geological sub-provinces of the western

Superior geologic province in northwestern Ontario and hosts a rare metals pegmatite deposit. The deposit is

an LCT (lithium- cesium- tantalum) type pegmatite. These types of pegmatites have been the principal source

of hard rock lithium, tantalum, rubidium and cesium ores mined in the world but there are comparatively few

commercially-viable deposits.

Frontier is actively exploring its 100% owned project which contains the Pakeagama Lake pegmatite. The PAK

deposit has a current Measured and Indicated Resource of 7.89 million tonnes of 1.73% Li2O equivalent (eq.)

or 1.58% Li20 and 104 ppm Ta2O5 and an Inferred Resource of 295,600 tonnes of 1.35% Li2O eq. or 1.20%

Li2O and 103 ppm Ta2O5 which has a technical/ceramic grade spodumene with low inherent iron (below 0.1%

Fe2O3). The deposit has adjacent zones that are enriched in tantalum and rubidium.

The deposit now has a known 500m strike length with an estimated true width varying from 10m to 125m with

a sub-vertical orientation. The resource remains open to depth and along strike to the northwest and southeast.

General Offi ce

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Company Contact Information

Trevor R. Walker, President & CEO

2736 Belisle Drive Val Caron, ON, P3N 1B3, CANADA

T. +001 705.897.7622

F. +001 705.897.7618

Media Requests

Joseph Mansourian

Manager, Investor Relations

2736 Belisle Drive Val Caron, ON, P3N 1B3, CANADA

T. +001 705.618.0070

F. +001 705.897.7618

Additional information regarding Frontier Lithium is available on SEDAR at www.sedar.com under the Company’s

profi le and on its website at www.frontierlithium.com, including various pictures of ongoing work at the project.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defi ned in the policies of the

TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.