Standard Lithium Ltd.: Standard Lithium Provides Development Update on California Lithium Project

VANCOUVER, British Columbia, 2017-12-11 11:00 CET (GLOBE NEWSWIRE) --
Standard Lithium Ltd. ("Standard Lithium" or the "Company") (TSX-V: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 10th 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 at
www.standardlithium.com. 

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. 

         For further information, contact Anthony Alvaro at [phone]