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EXN.V ·

Excellon Commences 2018 Exploration Program at Platosa and Appoints New Director

Management Changes Exploration Programs

www.excellonresources.com

EXCELLON COMMENCES 2018 EXPLORATION PROGRAM

AT PLATOSA AND APPOINTS NEW DIRECTOR

Toronto, Ontario – December 14, 2017 – Excellon Resources Inc. (TSX:EXN, EXN.WT and EXN.WT.A;

OTC:EXLLF) ("Excellon" or the “Company") is pleased to announce the commencement of an extensive

surface exploration program on the 21,000-hectare Platosa Property in Durango, Mexico targeting

further extensions to the Platosa Mine system and new manto and skarn discoveries. The program is

planned to include:

• 30,000 metres of diamond drilling to:

o define additional mineralization near existing infrastructure at the Platosa Mine from

underground drill platforms, following up on successful drilling from earlier in 2017;

o test and discover new manto mineralization along the prospective Platosa Corridor,

which has recently been defined by geophysical analyses over a five-kilometer strike

north and south of the Platosa Mine, with surface drilling commencing this week; and

o test skarn targets (~500m below surface) northeast of the 2012 Rincon Del Caido

discovery (“Rincon”) in more prospective settings.

• extensive soil geochemistry and induced polarization (“IP”) surveys at developing targets

including Saltillera, Jaboncillo and San Gilberto; the latter two targets have not been explored

historically but exhibited mineralization on surface in recent prospecting.

“The upcoming exploration program is founded on a back-to-basics review and reanalysis of the large

historical database of geophysics, geochemistry and drilling on the Platosa Property,” stated Ben

Pullinger, Vice President Geology. “This analysis has already successfully identified new prospective

targets at Jaboncillo and San Gilberto, which have been confirmed by field mapping. We are confident

that this methodology and the improved understanding of the regional system surrounding the Platosa

Mine will lead to positive exploration results in 2018. We are also pleased to have the funding secured

to execute this comprehensive exploration program as we explore for new manto and skarn discoveries

on one of Mexico’s most prospective mineral belts.”

Defining Additional Tonnage at the Platosa Mine

Since Q3 2016, the Company has completed 24 diamond drill holes totaling 6,600 metres from surface

and 75 diamond drill holes totaling 6,000 metres from existing underground infrastructure at Platosa.

Highlights from this program include:

• discovery of the connection between the Pierna and the Rodilla Mantos;

• extension of the NE-1 Manto to the east;

• discovery of new mineralization linking the high-grade 623 and Guadalupe South Mantos, with

significant results* including:

o 1,203 g/t Ag, 9.3% Pb and 13.4% Zn or 2,255 g/t silver equivalent (“AgEq”) over 11.1

metres in EX17UG330, including 2,079 g/t Ag, 14.2% Pb, 23.9% Zn or 3,857 g/t AgEq

over 5.2 metres;

o 1,366 g/t Ag, 7.9% Pb and 13.6% Zn or 2,369 g/t AgEq over 3.2 metres in EX17UG328

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o 2,291 g/t Ag, 15.0% Pb and 13.3% Zn or 3,570 g/t AgEq over 3.6 metres in EX17UG329

o 886g/t Ag, 8.8% Pb and 20.5% Zn over 6.76 metres in EX17UG323;

o 2,965 g/t Ag, 16.4% Pb and 0.9% Zn over 1.45 metres and 1,171 g/t Ag, 9.3% Pb and

2.9% Zn over 1.06 metres in EX17UG324; and

o 1,600 g/t Ag, 6.4% Pb and 8.7% Zn over 3.70 metres in EX17UG325.

* All intervals are reported as core length. AgEq in holes 328-330 assume $17.00 Ag, $1.03 Pb and $1.23 Zn, while holes

323-325 assume $16.50 Ag, $1.00 Pb and $1.25 Zn, all with 100% metallurgical recovery.

Drilling has been ongoing from a dedicated drill drift over the high-grade 623 Manto since late October,

with this phase of the program designed to delineate additional mineralization around the periphery

and to depth on the manto. Following completion of this phase of drilling in Q1 2018, the underground

program will focus on further delineating the connection between the Pierna and Rodilla Mantos and

subsequently focus on expanding the Pierna Manto laterally to the south and to depth. The Company

expects to release further results from this program in Q1 2018.

Drilling for New Platosa Mantos and Skarn Discoveries

The Company has also completed a comprehensive reprocessing and review of geophysical data and a

property-wide re-interpretation of the structural and lithological controls for mineralization at Platosa.

Through this process, the Company has generated numerous targets based on geology, chemistry,

structure and geophysics that will be tested throughout 2018. Priority drill targets in this program

include:

• manto targets defined by lithological and structural analyses on the Platosa Corridor

immediately south of the high-grade Guadalupe South Manto;

• manto targets north of the historically mined Guadalupe North Manto, where stringer

mineralization encountered in recent underground drilling indicates potential for additional

manto mineralization associated with structural confluences;

• manto targets on the Platosa Corridor north and south of the Platosa Mine defined by IP and

gravity geophysics; and

• skarn targets similar to Rincon (146 g/t Ag, 2.8% Pb, 1.9% Zn and 0.22 g/t Au over 43.40 metres,

including 381 g/t Ag, 10.6% Pb, 11.5% Zn, 0.35 g/t Au over 5.8 metres in LP1023A) in larger and

potentially more prospective settings to the northeast of Rincon, which have been defined

through reprocessing and reanalyses of IP, magnetics (ZTEM) and gravity geophysics.

Exploring for More Platosa-style Deposits on the Platosa Property

Over the last 12 months, in addition to surface and underground drilling, the Company has reinitiated

fundamental exploration of the Platosa Property, including focused mapping and prospecting at

Saltillera North and Jaboncillo, six kilometres and 11 kilometres northwest of the Platosa Mine,

respectively. Both targets continue to return anomalous results for silver and base metals over growing

strikes of 600 metres and 1,100 metres, respectively. The Company believes these results to be

indicative of the alteration profile associated with an underlying and structurally influenced mineralizing

system. This work and results provided the foundation for targeting the soil geochemistry surveys that

commenced in the Q4 2017, which will be followed by geophysical campaigns in the first half of 2018.

The Company expects to define new drill targets from these surveys to be tested in the second half of

2018.

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San Gilberto is a newly developing target located 13 kilometres south of the Platosa Mine, which was

identified through gravity and magnetic analyses. This target will be progressed further with surface

prospecting and, likely, IP surveying later in 2018.

2018 Initial Exploration Programs at Platosa

Appointment to Board of Directors

The Company is also pleased to announce the appointment of Andrew Farncomb to its Board of Directors.

Mr. Farncomb is a founder of Cairn Merchant Partners LP, a merchant bank focused on advisory and

principal investing. He has extensive experience advising public and private companies on mergers,

acquisitions and financing transactions. He is a founder and director of Contact Gold Corp., an advanced

stage Nevada gold exploration company, a board member of several other TSX Venture Exchange listed

companies and a board member and Chair of the Investment Committee at the Flavelle Family

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Foundation. Mr. Farncomb was formerly a Partner and Investment Banking professional at Paradigm

Capital Inc., a Canadian investment dealer, and graduated from Smith School of Business at Queen's

University with a Bachelor of Commerce (Honours) degree.

“Andrew brings extensive capital markets experience and a broad perspective to the Board. We look

forward to Andrew’s contributions in the coming years,” stated André Fortier, Chairman.

Geological Description of the Platosa Property

The Platosa mineral resource sits under approximately 56-hectares of the 21,000-hectare Platosa

Property and comprises a series of linked high-grade massive sulphide, silver-lead-zinc manto deposits

on the periphery of an under-explored Carbonate Replacement Deposit (“CRD”) system. CRDs are

epigenetic, intrusion-related, high-temperature, sulphide-dominant, lead-zinc-silver-copper-gold-rich

deposits that commonly occur in clusters associated with major regional geologic features. The Mexican

CRD Belt is perhaps the world's best-developed CRD cluster and Platosa lies in the centre of the

northwest-southeast-trending axis of the largest deposits of the belt.

CRD orebodies take the form of lenses or elongate to elongated-tabular bodies referred to as mantos or

chimneys depending on whether they are horizontal or steeply inclined. A spectrum of C RD orebodies

exists, ranging from distal manto and medial chimney massive sulphide bodies to proximal sulphide-rich

skarns associated with unmineralized or porphyry-type intrusive bodies.

Historically, manto exploration has focused on areas within 1.5 km of the Platosa Mine. Outside of the

immediate resource area drilling has been limited, but has consistently encountered the favourable

heterolithic fragmental limestone unit that hosts all the high-grade massive sulphide mineralization

discovered to date at Platosa. There is excellent potential to continue to discover new mantos as the

deposit area is open to the north, northeast, east and southeast of the known mantos.

Qualified Person

Mr. Ben Pullinger, P. Geo, Vice-President Geology, has acted as the Qualified Person, as defined in NI 43-

101, with respect to the disclosure of the scientific and technical information relating to exploration

results contained in this press release.

About Excellon

Excellon’s 100%-owned Platosa Mine in Durango has been Mexico’s highest-grade silver mine since

production commenced in 2005. The Company is focused on optimizing the Platosa Mine’s cost and

production profile, discovering further high-grade silver and carbonate replacement deposit (CRD)

mineralization on the Platosa Project and epithermal silver mineralization on the Miguel Auza Property

and capitalizing on the opportunity in current market conditions to acquire undervalued projects in Latin

America.

Additional details on the La Platosa Mine and the rest of Excellon’s exploration properties are available

at www.excellonresources.com.

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For Further Information, Please Contact:

Excellon Resources Inc.

Brendan Cahill, President & Chief Executive Officer or

Nisha Hasan, Vice President, Investor Relations

(416) 364-1130

[email protected]

www.excellonresources.com

Forward-Looking Statements

The Toronto Stock Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of the content of this Press

Release, which has been prepared by management. This press release contains forward-looking statements within the meaning of Section 27A

of the Securities Act and Section 27E of the Exchange Act. Such statements include, without limitation, statements regarding the future results of

operations, performance and achievements of the Company, including potential property acqui sitions, the timing, content, cost and results of

proposed work programs, the discovery and delineation of mineral deposits/resources/reserves, geological interpretations, proposed production

rates, potential mineral recovery processes and rates, business and financing plans, business trends and future operating revenues. Although the

Company believes that such statements are reasonable, it can give no assurance that such expectations will prove to be correct. Forward-

looking statements are typically identified by words such as: believe, expect, anticipate, intend, estimate, postulate and similar expressions, or

are those, which, by their nature, refer to future events. The Company cautions investors that any forward-looking statements by the Company

are not guarantees of future results or performance, and that actual results may differ materially from those in forward looking statements as a

result of various factors, including, but not limited to, variations in the nature, quality and quantity of any mineral deposits that may be located,

significant downward variations in the market price of any minerals produced [particularly silver], the Company's inability to obtain any

necessary permits, consents or authorizations required for its activities, to produce minerals from its properties successfully or profitably, to

continue its projected growth, to raise the necessary capital or to be fully able to implement its business strategies. All o f the Company's public

disclosure filings may be accessed via www.sedar.com and readers are urged to review these materials, including the technical reports filed with

respect to the Company's mineral properties, and particularly the July 9, 2015 NI 43-101-compliant technical report prepared by Roscoe Postle

Associates Inc. with respect to the Platosa Property. This press release is not, and is not to be construed in any way as, an offer to buy or sell

securities in the United States.