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Revenue from Contracts with Customers (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The Company’s portfolio of products are integrated into a variety of end uses, which are described in the table below.
Key End Uses | Key Products
Industrial & process chemicals | • Silicate precursors for the tire industry
| • Glass beads, or microspheres, for metal finishing end uses
Fuels & emission control | • Refinery catalysts
| • Emission control catalysts
| • Catalyst recycling services
| • Silicate for catalyst manufacturing
Packaging & engineered plastics | • Catalysts for high-density polyethlene and chemicals syntheses
| • Antiblocks for film packaging
| • Solid and hollow microspheres for composite plastics
| • Sulfur derivatives for nylon production
Highway safety & construction | • Reflective markings for roadways and airports
| • Silica gels for surface coatings
Consumer products | • Silica gels for edible oil and beer clarification
| • Precipitated silicas, silicates and zeolites for the dentifrice and
| dishwasher and laundry detergent applications
Natural resources | • Silicates for drilling muds
| • Hollow glass beads, or microspheres, for oil well cements
| • Silicates and alum for water treatment mining
| • Bleaching aids for paper
The following tables disaggregate the Company’s sales, by segment and end use, for the three and nine months ended September 30, 2018:
|  | Three months ended September 30, 2018
|  | Environmental Catalysts & Services |  | Performance Materials & Chemicals |  | Total
Industrial & process chemicals |  | $ | 21,027 |  |  | $ | 65,070 |  |  | $ | 86,097 |
Fuels & emission control (1) |  | 66,095 |  |  | — |  |  | 66,095 |
Packaging & engineered plastics |  | 32,983 |  |  | 31,848 |  |  | 64,831 |
Highway safety & construction (1) |  | — |  |  | 105,204 |  |  | 105,204 |
Consumer products |  | — |  |  | 67,138 |  |  | 67,138 |
Natural resources |  | 19,611 |  |  | 19,059 |  |  | 38,670 |
Total |  | 139,716 |  |  | 288,319 |  |  | 428,035 |
Inter-segment sales eliminations |  | (832 | ) |  | — |  |  | (832 | )
Total segment sales |  | $ | 138,884 |  |  | $ | 288,319 |  |  | $ | 427,203 |
|  | Nine months ended September 30, 2018
|  | Environmental Catalysts & Services |  | Performance Materials & Chemicals |  | Total
Industrial & process chemicals |  | $ | 55,401 |  |  | $ | 216,152 |  |  | $ | 271,553 |
Fuels & emission control (1) |  | 182,304 |  |  | — |  |  | 182,304 |
Packaging & engineered plastics |  | 95,145 |  |  | 97,622 |  |  | 192,767 |
Highway safety & construction (1) |  | — |  |  | 263,095 |  |  | 263,095 |
Consumer products |  | — |  |  | 209,256 |  |  | 209,256 |
Natural resources |  | 53,471 |  |  | 58,177 |  |  | 111,648 |
Total |  | 386,321 |  |  | 844,302 |  |  | 1,230,623 |
Inter-segment sales eliminations |  | (2,510 | ) |  | — |  |  | (2,510 | )
Total segment sales |  | $ | 383,811 |  |  | $ | 844,302 |  |  | $ | 1,228,113 |
(1) | As described in Note 1, the Company experiences seasonal sales fluctuations to customers in the fuels & emission control and highway safety & construction end uses.

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