M I N E R A L S T E C H N O L O G I E S I N C . A p r i l 2 0 1 8

MTI OVERVIEW

SAFE HARBOR STATEMENT

2

This presentation may contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 which describe or are based on current expectations. Actual results may differ materially from these expectations. In addition, any statements that are not historical fact (including statements containing the words “believes,” “plans,” “anticipates,” “expects,” “estimates,” and similar expressions) should also be considered to be forward-looking statements. The company undertakes no obligation to publicly update any forward-looking statement, whether as a result of new information, future events, or otherwise. Forward-looking statements in this document should be evaluated together with the many uncertainties that affect our businesses, particularly those mentioned in the risk factors and other cautionary statements in our 2017 Annual Report on Form 10-K and in our other reports filed with the Securities and Exchange Commission.

Also, this presentation will include certain financial measures that were not prepared in accordance with generally accepted accounting principles. Reconciliations of those non-GAAP financial measures to the most directly comparable GAAP financial measures can be found in our Current Report on Form 8-K dated February 1, 2018, and in our other reports filed with the Securities and Exchange Commission, available on our website at www.mineralstech.com in the "Investor Information -- SEC Filings" section.

• Heritage MTI locations

MTI AT A GLANCE

• Former AMCOL locations

~3,700 EMPLOYEES

156 WORLDWIDE

PRODUCTION LOCATIONS

12 R&D CENTERS

35 BASE-OF-

OPERATION COUNTRIES

4BUSINESS SEGMENTS$1.7

BILLION2017 SALES

3

FULL YEAR2017 HIGHLIGHTS

Record EPS and Operating Income; Continued Strong Operating Margins of 15.7% and Strong Cash Flow

6% Productivity Improvement

Over 6,000 Kaizen Events; 53,000 Employee Suggestions –~70% Implementation Rate

Strengthened the Balance Sheet$110 Million of Term Load Repaid; Net Leverage Ratio at 2.2X

Greater Capital Deployment Opportunities

4

R E V E N U E O P E R AT I N G I N C O M E

E AR N I N G S P E R S H AR E

% Year-Over-Year Change

P E R F O R M AN C E H I G H L I G H T SG R O W T H H I G H L I G H T S

The above figures reflect the Company’s operating income, operating margin, and EPS, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

$4.59+3%

$1,676+2%

$263+2%

7% Growth in the 2nd Half of 2017

7% Growth in Asia; 12% Growth in China

Organizational Changes

Geographic Expansion: 2 PCC Satellite Contracts; +245,000 tons of Capacity; Expansions to Support New Products

Innovation: 81 New Products Commercialized in the Last 5 Years

$ Millions, Except Per Share Amounts

ANNUALEPS TREND

The above chart reflects the Company’s EPS, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. This is a non-GAAP measure that the Company believes provides meaningful supplemental information regarding its performance. 5

$4.59$4.47$4.31

$4.00

$2.42$2.16

$1.93$1.82

2014 20172013201220112010

+14% CAGR

2016

+3%

2015

Operational Excellence (“OE”) Foundation

Employee SuggestionsThousands

Kaizen EventsThousands

Structured Business System

6

DRIVINGSHAREHOLDER VALUE

The above charts reflect the Company’s operating margin, EBITDA, and ROC, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

Engaged Employees Solid Financial Position

2017

6.2

2016

4.0

2015

3.0

2014

1.9

2013

1.9

2012

1.2

17.8

2013

15.4

2012

9.8

2017

53.1

2016

45.1

2015

39.7

2014

20.6%EBITDA Margin

Strong Values and Culture

Accountability

OrganizationalAlignment

Innovation

Speed of Execution

2.2XNet

Leverage

$415Million of Liquidity

ProductivityYear Over Year Improvement

6%7%6%5%6%9%

201720162015201420132012

15.7%Operating

Margin

9.2%ROC

Product Lines

7The above figures reflect the Company’s operating income, operating margin, and EBITDA, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

20.8%EBITDA Margin

$735Sales

$120Operating Income

PERFORMANCE MATERIALSStrong Positions• #1 Worldwide in Bentonite• #1 in U.S. in Metalcasting Binders• #1 in U.S. in Bulk Clumping Cat Litter• #1 in Quality Assurance Waterproof Concrete Structures

• Metalcasting – binder systems for ferrous and non-ferrous casting

• Health, Personal Care (HPC) & Specialty Products – pet care, fabric care, beauty

• Basic Minerals & Other Products – drilling fluids & additives, iron ore pelletizing, chromite

• Environmental Products –liners, remediation applications

• Building Materials –waterproofing

• Automotive• Industrial Equipment• Steel• Consumer• Energy• Construction• Environmental• Agriculture

• Metalcasting Growth Driven By Geographic Expansion and Penetration in Asia and India

• HPC and Environmental Products Growth From New Product Development and Geographic Expansion; Ramp Up in Fabric Care Plant

• Healthy Market Conditions for Building Materials

• Environmental Products Transition to Higher Value Environmental Systems

• Various Capacity Expansions Globally

Markets 2018 Growth

16.3%Margin

FY 2017, $ Millions

44%of MTI

45%of MTI

Product Lines

8The above figures reflect the Company’s operating income, operating margin, and EBITDA, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

23.4%EBITDA Margin

$585Sales

$101Operating Income

SPECIALTY MINERALSStrong Positions• #1 Worldwide in Precipitated Calcium Carbonate• #1 in North America in Specialty PCC

• Paper PCC – printing and writing paper

• Ground Calcium Carbonate (GCC) – construction, automotive, consumer

• Specialty PCC – polymers for auto/construction, adhesives, food, pharmaceuticals

• Talc – ceramic applications, paints and coatings, polymers

• Paper and Packaging• Automotive• Consumer• Construction

• PCC Capacity Expansions and New Satellites (+245K metric tons in 2018)

• Customer Driven New Products and Capacity Expansions in Talc and Specialty PCC

• Innovations in Packaging to Expand Product Portfolio

Markets 2018 Growth

17.3%Margin

FY 2017, $ Millions

34%of MTI

39%of MTI

Product Lines

9The above figures reflect the Company’s operating income, operating margin, and EBITDA, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

16.6%EBITDA Margin

$279Sales

$40Operating Income

REFRACTORIESStrong Positions• #1 in North American Monolithic Refractories• #1 North America and Europe in Solid Core Calcium Wire• #1 Globally in Refractory Laser Measurement Systems

• Refractory Products –monolithic refractories used in steel-making furnaces

• Metallurgical Wire – calcium and alloy wires to improve steel quality

• Laser Measurement Equipment – measure refractory wear to improve performance

• Service – high levels of support from on-site service personnel

• Integrated Steel Mills – Basic Oxygen Furnaces, Molten Metal Handling Systems, Blast Furnaces

• Electric Arc Furnace Mills (EAF)

• Stable Steel Utilization Rates• New High Durability Refractory

Products• New Laser Measurement

System Applications

Markets 2018 Growth

14.2%Margin

FY 2017, $ Millions

17%of MTI

15%of MTI

Product Lines

10The above figures reflect the Company’s operating income, operating margin, and EBITDA, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

17.9%EBITDA Margin

$77Sales

$7Operating Income

ENERGY SERVICES

• Off-Shore Water Filtration –flowback and produced water filtration

• Off-Shore Well Testing –equipment and personnel to control well production

• Global Off-Shore Oil Production • Driven by Global Off-Shore Oil Production

Markets 2018 Growth

8.9%Margin

FY 2017, $ Millions

Strong Positions• Leading Global Off-Shore Produced Water and Well

Testing Services Company• #1 in Gulf of Mexico in Flowback Filtration, Produced

Water Deepwater Projects, and High Pressure/High Temperature Well Testing5%

of MTI3%

of MTI

DEBT AND LIQUIDITY HIGHLIGHTS

• $590M of Term Loan Debt Repaid Since 2Q’14• Total Liquidity of $415M; $215M Cash & Cash Equivalents, $200M Revolver

11

9701,0031,0321,0641,0831,1281,177

1,2271,2651,334

1,3831,4251,4611,5211,558

2.22.32.52.52.52.62.72.82.82.93.0

3.2

3.8

4.2

4.5

2Q1Q4Q3Q2Q1Q 4Q3Q2Q1Q4Q3Q4Q3Q2Q

Net Leverage RatioTotal Debt

2014 2015 2016 2017

$ Millions

2018PERSPECTIVE

12

Positioned to Deliver Profitable Growth in 2018

Performance Materials

• Metalcasting: Continued Growth in Asia; Maintaining Strong Position in North America• HPC: New Fabric Care and Pet Care Products Gaining Momentum• Building Materials and Environmental Products: New Leadership and Strong Sales Pipeline• Capacity Expansions in China, India, and Thailand• Ramping Down Mining and Sales of Bulk Chromite

Specialty Minerals

• 2 New Satellites Coming On-Line; Strong Pipeline of Other Targets• Impact of 2017 Paper PCC Shutdowns in North America• Strong Pipeline of New Technologies + Packaging• Performance Minerals Capacity Expansions

Refractories • Stable Global Steel Utilization Rates; Continued Strong Laser Product Sales• Challenging Raw Material Cost Increases

EnergyServices

• Improved Market Conditions – Better Visibility• Continued Sales and Operating Income Growth

MTI

• Operational Excellence Is the Foundation of MTI• Remain Focused on Delivering Profitable Growth• Businesses Working to Mitigate Higher Raw Material and Energy Costs• Strong Financial Resources; Balanced Approach to Capital Deployment

FOURTH QUARTER 2017HIGHLIGHTS

13

M I N E R A L S T E C H N O L O G I E S I N C .

FOURTH QUARTER 2017 HIGHLIGHTS

14.5% Operating Margin

6% Productivity Improvement

$57M Cash From Operations

$30M Debt Repaid

14

R E V E N U E O P E R AT I N G I N C O M E

E AR N I N G S P E R S H AR E

% Year-Over-Year Change

P E R F O R M AN C E H I G H L I G H T SG R O W T H H I G H L I G H T S

The above figures reflect the Company’s operating income, operating margin, and EPS, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

$1.10+2%

$432+8%

$63+4%

9% Minerals Businesses Growth

5% Service Businesses Growth

10% Asia Growth

12% China Growth

$ Millions, Except Per Share Amounts

4Q16 4Q17 Change

Sales ($M) 401.3 432.1 +8%

Gross Margin (%) 27.8 26.5 (5%)

SGA (%) 12.7 12.0 (5%)

Operating Income ($M) 60.3 62.5 +4%

Operating Margin (%) 15.0 14.5 (3%)

Earnings per Share ($) 1.08 1.10 +2%

FOURTH QUARTER FINANCIAL HIGHLIGHTS

15

$ Millions

K E Y F I N A N C I A L S O P E R AT I N G I N C O M E B R I D G E

The above figures reflect the Company’s EPS, operating income, and operating margin, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

1.2

0.20.41.7

RefractSMI 4Q17

+4%

62.5

Corp / FX / Other

Energy Svc

PMAT

(1.3)

4Q16

60.3

Chromite Price $(5M)

FOURTH QUARTER 2017EPS RECONCILIATION

16The above figures reflect the Company’s EPS, excluding special items, such as acquisition-related costs, restructuring, gains/(losses) on asset sales and impairment costs and related tax effects, for all periods presented. These are non-GAAP measures that the Company believes provide meaningful supplemental information regarding its performance.

Reported EPS $2.12Pre-tax (Gain) /

Loss

After-tax (Gain) /

Loss

Effect of US Tax Law Change $(47.3M) $(1.32)

Restructuring and Other Items $9.4M $5.8M $0.16

Impairment of Assets $5.3M $3.4M $0.10

Write-off of Receivables for Malaysia Bankruptcy $2.1M $1.6M $0.04

EPS, Excluding Special Items $1.10

MINERALS BUSINESSESHIGHLIGHTS

• Performance Materials– Metalcasting Sales +17%; China +22%– Building Materials Sales +21%– Household, Personal Care & Specialty +16%

• Specialty Minerals– PCC Sales +4%– Ground Calcium Carbonate Sales +9%

• Operating Margin at 15.1%

S A L E S O P E R AT I N G I N C O M E

$ Millions

F O U R T H Q U A R T E R H I G H L I G H T S M I N E R A L S P R O D U C T L I N E S

17Specialty Minerals42% ($144M)

PerformanceMaterials

(Bentonite-based)

SpecialtyMinerals

(Carbonate-based)

339.7313.0

336.5

4Q16

+9%

4Q173Q17

51.457.2

51.0

+1%

4Q173Q174Q16

6%5%

14%

23%

28%

10%

6%4%4%

Building MaterialsEnvironmentalHPCMetalcasting

Basic MineralsPaper PCCSpecialty PCC

GCCTalc

$340M

Performance Materials58% ($196M)

18

PERFORMANCE MATERIALS

• Metalcasting Sales +17%; China +22% • Building Materials Sales +22%• Household, Personal Care & Specialty

+16%• Environmental Products +10%• Operating Margin at 14.4%

$ Millions

• Continued Growth Across Most Product Lines

• Continued Strong Metalcasting• Bulk Chromite Tapering Off in Q1

S A L E S O P E R AT I N G I N C O M E

F O U R T H Q U A R T E R H I G H L I G H T S

F I R S T Q U A R T E R O U T L O O K

+12%

4Q17

195.8

3Q17

188.8

4Q16

175.0 28.130.629.4

4Q17

-4%

3Q174Q16

SPECIALTY MINERALS

• Paper PCC Sales +4%– Europe Paper PCC +18%– Asia Paper PCC +6%– Latin America Paper PCC +5%

• Specialty PCC Sales +8%• GCC Sales +9%• Operating Margin at 16.2%

$ Millions

F O U R T H Q U A R T E R H I G H L I G H T S

F I R S T Q U A R T E R O U T L O O K• Paper PCC

– Continued Growth in Asia

• Performance Minerals– Seasonal Uptick in Volume

19

+4%

4Q173Q17

147.7138.0 143.9

4Q16

23.326.6

21.6

+8%

4Q173Q174Q16

S A L E S O P E R AT I N G I N C O M E

SERVICE BUSINESSESHIGHLIGHTS

• 5% Sales Growth– Refractories Segment +5%– Energy Services +4%

• Operating Margin at 13.4%

20

23%

15% 62%Energy ServicesMetallurgicalRefractory

$92M

$ Millions

F O U R T H Q U A R T E R H I G H L I G H T S S E R V I C E P R O D U C T L I N E S

92.487.988.3

3Q174Q16

+5%

4Q17

12.411.511.8

4Q16

+5%

4Q173Q17

S A L E S O P E R AT I N G I N C O M E

21

REFRACTORIES

• Metallurgical Products Sales +13%

• Refractory Products Sales +3%

• Operating Margin of 14.3%

• Fewer Laser Equipment Sales Vs Prior Year Due to Timing

$ Millions

• Stable Market Conditions

• Continued Sales Growth

• Steady Laser Equipment Sales

F O U R T H Q U A R T E R H I G H L I G H T S

F I R S T Q U A R T E R O U T L O O K

71.368.968.0

+5%

4Q173Q174Q16

10.29.99.8

4Q17

+4%

3Q174Q16

S A L E S O P E R AT I N G I N C O M E

22

ENERGY SERVICES

• Sequential Quarter Sales +11%

• Sequential Quarter Operating Income +38%

• Operating Margin of 10.4%

$ Millions

• Similar Level of Offshore Service Activity

• Lower Filtration in Q1

F O U R T H Q U A R T E R H I G H L I G H T S

F I R S T Q U A R T E R O U T L O O K

21.119.020.3

4Q173Q174Q16

+11%

2.2

1.6

2.0

+38%

4Q173Q174Q16

S A L E S O P E R AT I N G I N C O M E