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Frontier Intersects Over 340 Metres of Pegmatite Averaging 1.68% Li2O at the Spark Pegmatite

Drill Results

Frontier Intersects Over 340 Metres of

Pegmatite Averaging 1.68% Li2O at the Spark

Pegmatite

SUDBURY, ON

,

June 1, 2021

/CNW/ - Frontier Lithium Inc. (TSXV: FL) (OTCQX: LITOF) ("Frontier"

or "the Company") is pleased to announce the results of two of six drill holes drilled during Febrary

and March on the Spark pegmatite. Although drilling was completed on

March 19

th

2021, analytical

results have been delayed due mainly to the COVID Pandemic and QA/QC issues during

processing.

Highlights

Diamond Drill Hole ("DDH") PL-048-21 collared in pegmatite and intersected

340.7m

of

pegmatite averaging 1.68% Li

2

O;

Includes two continuous intersections of 153.1 and

116.2m

averaging 1.62% and

1.68% Li

2

O;

Includes narrower high grades zones of up to

26m

of 2.36% with one

8m

zone

averaging 3.13% Li2O;

Geomechanical DDH PL-GDH-06-21 intersected

82.2m

averaging 1.25% Li

2

O with an

11.2

m

zone at the top of the hole averaged 2.22% Li

2

O;

The western extent of the deposit is open and appears to be trending to the southwest;

Results from the remaining 4 holes are pending.

"These results reflect the strong homogeneity of the Spark deposit's spodumene and corresponding

lithium grades in the pegmatite," states

Garth Drever

, V.P. Exploration, "The probability of the

deposit extending to the southwest is exciting. Over the next three weeks we will be on site at the

project preparing for the summer drill program starting in early July. Our objectives will be to

complete the geomechanical drilling and to upgrade the bulk of Inferred resource to Measured and

Indicated as required for the Company's advancing PFS. "

The objectives for the Phase IX drill program in February-

March 2021

were to complete targets that

were not easily accessible in summer months and considered vital for completing a Pre-feasibility

Study. Drilling included four delineation (in-fill) and two geomechanical holes. The geomechanical

holes were drilled to test stability of the proposed southern pit wall. Figure 1 is a location map

showing the project area including a compilation of the Spark Deposit area. Table 1 details the

mineralized intersections of two holes (PL-GDH-06-21 and PL-048-21) while Table 2 is a summary

of all the Phase IX drill holes and geomechanical holes.

Figure 1: Compilation showing Drill Holes on Spark Deposit on the PAK Lithium Project (CNW

Group/Frontier Lithium Inc.)

Table 1: Details of Mineralized Intersections

DDH PL-048-21

Drill hole oriented to the northwest to test the southwest trending orientations of foliations and contacts from previous drilling. The hole was collared

in pegmatite and intersected mineralized pegmatite to 381.9m with narrow intervals (10 m or less) of Mafic host rock totalling 30 m. Spodumene

consistently occurs throughout the pegmatite. A total of 340.7 m of pegmatite was intersected averaging 1.68% Li

2

O.

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Lithium Enriched

11.0

164.2

153.1

1.62

0.01

76

102

51

0.24

Aplite / liz

including

25.0

32.5

7.5

2.89

0.01

45

71

42

0.21

LIZ

including

120.0

146.0

26.0

2.36

0.01

78

101

38

0.19

Aplite/liz

Lithium Enriched

172.5

198.6

26.1

1.48

0.02

106

103

49

0.22

Aplite

Lithium Enriched

209.5

325.7

116.2

1.68

0.01

100

96

37

0.27

Aplite / liz

including

231.0

255.0

24.0

2.03

0.01

84

82

26

0.24

Aplite / liz

Lithium Enriched

332.7

349.3

16.6

2.14

0.02

107

68

49

0.20

LIZ / Aplite

including

335.0

343.0

8.0

3.13

0.02

118

56

44

0.20

LIZ

Lithium Enriched

353.2

381.9

28.8

1.91

0.01

79

82

45

0.19

LIZ / Aplite

including

377.0

381.9

4.9

2.63

0.01

54

52

38

0.14

LIZ

Entire Hole *

11.0

381.9

340.7

1.68

0.01

88

97

45

0.24

Aplite / liz

*

Not continuous pegmatite (intersection includes 4 mafic zones all <10m)

DDH PL-GDH-06-21

To characterize a portion of the south wall of the proposed open pit at Spark as per 43-101 report titled "PAK Property" issued on April 5, 2021 .

A previously unknown zone of spodumene-bearing Aplite was intersected from the collar to 101m grading 1.25% Li

2

O over the 88.2m interval

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Lithium Enriched

12.8

101.0

88.2

1.25

0.01

63

67

100

0.27

Aplite

including

12.8

56.0

43.2

1.58

0.01

61

59

97

0.25

Aplite

Including

12.8

24.0

11.2

2.22

0.01

59

46

83

0.22

Aplite/liz

The first hole drilled was the geomechanical hole PL-GDH-06-21 collared near the mid point of the

proposed southern pitwall as designed in the 2021 Preliminary Economic Assessment ("PEA"). The

hole was collared in spodumene-bearing aplite and extended down to

101m

. The hole ended with

76m

of mafic host rock. The aplite averaged 1.25% Li

2

O over the entire

88.2m

intersection with

upper

11.2m

averaging 2.22% Li

2

O.

The next two holes, PL-046-21 and PL-047-21 were delineation holes collared to the west (Figure 1,

Table2). Results are pending due to reasons stated above. Oriented structural data from these

holes and previously drilled holes suggest a southwest-northeast trend of the Spark pegmatite

towards the west. To better understand this, hole PL-048-21 was oriented towards the northwest

and stepped back to test the extent of the mineralized aplite intersected in hole PL-GDH-06-21.

PL-048-21 was also collared in pegmatite extending from

11.0m

down to

164.2m

before intersecting

8.3m

of metavolcanic host rock then back into predominately pegmatite to

381.9m

. The hole ended

at

393.0m

in metavolcanics. In total,

340.7 m

of spodumene-bearing aplite-pegmatite was

intersected consistently averaging 1.68% Li

2

O. The mineralized zone is dominated by spodumene-

bearing aplite with several zones of coarser-grained LIZ (Lower-Intermediate Zone similar to PAK)

occur with spodumene laths up to 3cm with increased Li

2

O content. Examples are

7.5m

from 25 to

32.5m

averaging 2.89% Li

2

O and

8m

from 335 to 343 averaging 3.13% Li

2

O.

Results from the remaining holes are expected in the near future.

Table 2: Summary of Drill Holes

Geomechanical

DDHNo

Date Drilled

UTM Zone 15N (NAD83)

Collar Orient

Metres Drilled

Start

End

Easting

Northing

(mASL)

Azim

Dip

Start

End

Spark

PL-GDH-06-21

2021-02-07

2021-02-10

472,803

5,829,380

326.2

177

-50

0

177.0

PL-GDH-07-21

2021-02-25

2021-02-26

472,950

5,829,376

325.5

165

-46

0

83.0

Total metres drilled

260.0

Delineation

DDHNo

Date Drilled

UTM Zone 15N (NAD83)

Collar Orient

Metres Drilled

Start

End

Easting

Northing

(mASL)

Azim

Dip

Start

End

Phase IX

PL-046-21

2021-02-11

2021-02-18

472,781

5,829,321

326.0

330

-47

0

376.2

PL-047-21

2021-02-18

2021-02-24

472,695

5,829,295

326.0

330

-48

0

298.5

PL-048-21

2021-02-26

2021-03-08

472,865

5,829,345

326.0

305

-50

0

393.0

PL-049-21

2021-03-08

2021-03-19

472,880

5,829,317

326.0

330

-42

0

303.2

Total metres drilled

1,370.9

Due Diligence

All scientific and technical information in this release has been reviewed and approved by

Garth Drever, P.Geo., the qualified person (QP) under the definitions established by National

Instrument 43-101. Under Frontier's QA/QC procedures, all drilling was completed by Chenier

Drilling Ltd. of

Val Caron, ON

using thin-walled BTW drill rods (4.2 cm core diameter) and a Reflex

ACT III oriented core system. Using the Reflex system, the drill core was oriented and marked as it

was retrieved at the drill. The core was boxed and delivered to the Frontier core shack where it was

examined, geologically logged and marked for sampling. The core was photographed prior to

sampling. Using a rock saw, the marked sample intervals were halved with one half bagged for

analysis. Sample blanks along with lithium, rubidium and cesium certified 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. The

samples were placed in poly sample bags and transported to

Red Lake

by Frontier employees and

then shipped to AGAT Laboratories Ltd. (AGAT) in

Thunder Bay

for processing and to

Mississauga,

ON

for quantitative multi-element analysis. AGAT is an ISO accredited laboratory. The core is

stored on site at the Pakeagama Lake exploration camp.

About Frontier Lithium

Frontier Lithium (TSX.V: FL) (OTCQX: LITOF) (FSE: HL2) is an emerging pure play lithium company

with the largest land position in the Electric Avenue, an emerging premium lithium mineral district

located in the Great Lakes region of northern

Ontario

. The company maintains 100% ownership in

the PAK Lithium Project which contains one of

North America's

highest-grade, large tonnage hard-

rock lithium resources in the form of a rare low-iron spodumene. The Project has significant upside

exploration potential. Frontier is a pre-production business that is targeting the manufacturing of

battery quality lithium hydroxide in the Great Lakes Region to support electric vehicle and battery

supply chains in

North America

. Frontier maintains a tight share structure with management

ownership approximately 25% of the Company.

About PAK Lithium Project

The PAK Lithium Project encompasses 26,774 hectares at the south end of

Ontario's

Electric

Avenue, the largest land package hosting premium lithium bearing pegmatites in

Ontario

. The Project

covers 65 km of the Avenue length and remains largely unexplored; however, since 2013 the

company has delineated two premium spodumene bearing lithium deposits (Pak and Spark) located

2.3 km from each other. A 2021 Preliminary Economic Assessment of a fully-integrated lithium

operation utilizing spodumene concentrate generated from the PAK Lithium Project resource to

achieve downstream conversion for production of battery-quality lithium chemicals (NI 43-101

Technical report titled "PAK Property" by BBA Engineering Ltd. issued on

April 5, 2021

) resulted in a

post-tax NPV8% of USD

$974M

with a 21% IRR. Considerable exploration upside is supported on

the PAK Lithium Project through two other spodumene bearing discoveries; Bolt pegmatite located

between PAK and Spark deposits, as well as Pennock pegmatite, a further 30 km northwest of PAK

within the Project claims.

Forward-looking Statements

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in

the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of

this release. This release includes certain statements that may be deemed "forward-looking

statements". All statements in this release, other than statements of historical facts, that address

future production, reserve potential, exploration drilling, exploitation activities and events or

developments that the Company expects are forward-looking statements. Although the Company

believes the expectations expressed in such forward-looking statements are based on reasonable

assumptions, such statements are not guarantees of future performance and actual results or

developments may differ materially from those in the forward-looking statements. Factors that could

cause actual results to differ materially from those in forward looking statements include market

prices, exploitation and exploration successes, continued availability of capital and financing, and

general economic, market or business conditions. Investors are cautioned that any such statements

are not guarantees of future performance and those actual results or developments may differ

materially from those projected in the forward-looking statements. For more information on the

Company, Investors should review the Company's registered filings available at

sedar.com

.

SOURCE

Frontier Lithium Inc.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/June2021/01/c3515.html

%SEDAR: 00008434E

For further information:

Company Contact Information, Bora Ugurgel, Manager, Investor

Relations, 2736 Belisle Drive Val Caron, ON. P3N 1B3 CANADA, T. +001 705.897.7622, F. +001

705.897.7618

CO: Frontier Lithium Inc.

CNW 08:20e 01-JUN-21