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SLI.V ·

Standard Lithium Provides Development Update ON California Lithium Project

Corporate Updates

STANDARD LITHIUM LTD.

Suite 835, 1100 Melville Street

Vancouver, British Columbia

V6E 4A6

NEWS RELEASE

STANDARD LITHIUM PROVIDES DEVELOPMENT UPDATE ON CALIFORNIA

LITHIUM PROJECT

December 11 th, 2017 – Vancouver, BC – Standard Lithium Ltd.(“Standard Lithium” or the

“Company”) (TSXV: SLL) (FRA: S5L) (OTCQX:STLHF) is pleased to provide an update on the

development work taking place at the Company’s California Lithium Project; comprising the Bristol

Dry Lake and the Cadiz Dry Lake lithium brine properties located in the Mojave Desert, California.

A total of six new separate evaporation ponds have been installed on the Bristol Dry Lake Property to

further assess the role that short-duration passive solar evaporation may play in processing the lithium

brines encountered at the project. Previous work demonstrated that, owing to extremely high

evaporation rates in the project area, it is possible to concentrate brines from initial lithium

concentrations of 146 mg/L to concentrations of 686 mg/L in approximately 7 weeks (note, this

average lithium concentration was previously reported as 556 mg/L in news release dated 10 th Oct

2017, but has been revised upwards based on final QA/QC data). Additional evaporation tests are now

being conducted to assess seasonal variations in evaporation rates, and also to produce large volumes

of pre-concentrated brine that can be shipped to Standard Lithium’s testing facilities across North

America where it will be used in ongoing selective lithium extraction processing work. A bulk raw-

brine sample from the Cadiz Dry Lake Project will also be transported to the evaporation ponds over

next several weeks so that pre-concentration of lithium brine from this project can also be assessed.

In addition, a sampling program of lithium brine from all surface pits operating on TETRA’s Bristol

Dry Lake property has been approved and is ongoing, and it is expected that this work will be

completed over the next month. This shallow-brine data collection program will provide excellent

additional exploration coverage and increase data density across the large land package.

Exploration drilling work is ongoing at the Bristol Dry Lake Project, and four exploration boreholes

have been successfully drilled using air reverse-circulation techniques. Exploration hole DH-1 was

completed to the targeted depth of 700 ft below ground level (213 m); exploration hole DH-4 was

drilled to a greater depth of 1,195 ft (364 m); exploration hole DH-1 reached the targeted depth of 700

ft (213 m); and exploration borehole DH-3 was extended to a greater total depth of 1,060 ft (323 m).

All exploration boreholes intersected similar sequences of interbedded halite (salt) and finer-grained

clastic materials. Highly conductive brine was encountered throughout the entire drilled interval in

airlift samples from all four exploration boreholes drilled to date. Field-measured conductivities in the

brine samples were typically greater than 200 mS/cm, and initial results from an accredited laboratory

demonstrate that lithium contents and general brine chemistry are consistent with, or better than, those

previously reported in historical USGS boreholes. All final data, following secondary laboratory

analysis and full QA/QC, will be reported in the maiden resource estimate for the Bristol Dry Lake

Project, projected for the first half of 2018.

Drilling work is ongoing, and two additional drill targets have been identified and agreed on patented

mining claims owned by TETRA Technologies Inc. (Tetra) on the Bristol Dry Lake Project. Inclusion

of these two new targets will allow the brine deposits below the complete land package of 35,000+

acres to be evaluated, and as a result, a single resource statement for the total land package at Bristol

Dry Lake will be produced.

Quality Assurance

Raymond Spanjers, Certified Professional Geologist (SME No. 3041730), is a qualified person as

defined by NI 43-101, and has supervised the preparation of the scientific and technical information

that forms the basis for this news release. Mr. Spanjers is not independent of the Company as he is an

officer in his role as Vice President, Exploration and Development.

About Standard Lithium Ltd.

Standard’s value creation strategy encompasses acquiring a diverse and highly prospective portfolio of

large-scale domestic brine resources, led by an innovative and results-oriented management team with

a strong focus on technical skills. The Company is currently focused on the immediate exploration and

development of the Bristol Dry Lake Lithium Project located in the Mojave region of San Bernardino

County, California; the location has significant infrastructure in-place, with easy road and rail access,

abundant electricity and water sources, and is already permitted for extensive brine extraction and

processing activities. The Company is also commencing resource evaluation on 30,000+ acres of brine

leases located in the Smackover Formation.

Standard Lithium is listed on the TSX Venture under the trading symbol “SLL”; quoted on the

OTCQX under the symbol “STLHF”; and on the Frankfurt Stock Exchange under the symbol “S5L”.

Please visit the Company’s website atwww.standardlithium.com.

For further information, contact Anthony Alvaro at (604) 240 4793

On behalf of the Board,

Standard Lithium Ltd.

Robert Mintak, CEO & Director

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

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

This news release may contain certain “Forward-Looking Statements” within the meaning of the

United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities

laws. When used in this news release, the words “anticipate”, “believe”, “estimate”, “expect”,

“target, “plan”, “forecast”, “may”, “schedule” and other similar words or expressions identify

forward-looking statements or information. These forward-looking statements or information may

relate to future prices of commodities, accuracy of mineral or resource exploration activity, reserves

or resources, regulatory or government requirements or approvals, the reliability of third party

information, continued access to mineral properties or infrastructure, fluctuations in the market for

lithium and its derivatives, changes in exploration costs and government regulation in Canada and the

United States, and other factors or information. Such statements represent the Company’s current

views with respect to future events and are necessarily based upon a number of assumptions and

estimates that, while considered reasonable by the Company, are inherently subject to significant

business, economic, competitive, political and social risks, contingencies and uncertainties. Many

factors, both known and unknown, could cause results, performance or achievements to be materially

different from the results, performance or achievements that are or may be expressed or implied by

such forward-looking statements. The Company does not intend, and does not assume any obligation,

to update these forward-looking statements or information to reflect changes in assumptions or

changes in circumstances or any other events affections such statements and information other than as

required by applicable laws, rules and regulations.