For Immediate Release

Momentive To Expand Specialty Quartz Plant in Geesthacht, Germany

• $14 million project will increase production capacity for high purity quartz materials to meet growing demand from the photovoltaic and semiconductor industries
• Project is the third expansion of Momentive’s quartz and ceramics global production network announced this year
• Groundbreaking ceremony marks start of expansion project

Geesthacht, Germany (September 21, 2011) – Momentive Performance Materials Inc.’s Quartz & Ceramics business today kicked off an expansion of its specialty quartz production facility in Geesthacht, Germany, with a ceremony attended by government and business leaders, company officials and plant associates.

The $14 million expansion project at the Geesthacht manufacturing plant will enable Momentive to meet increasing global demand for its high-purity specialty fused quartz crucibles, used by the photovoltaic industry to produce solar wafers and the semiconductor industry in the production of computer chips.  The company manufactures a variety of specialty products that are essential to the photovoltaic wafer and semiconductor microchip production, including fused quartz crucibles used to “grow” silicon ingots, large-diameter fused quartz tubing, rods, and solid ingot in which silicon wafers are processed to make microchips.

The Geesthacht expansion will enable the site to increase production of large diameter fused quartz crucibles by approximately 100 percent.   These crucibles are used by customers as the vessels in which they produce monosilicon ingots, which are then further manufactured into silicon wafers.  The expansion project is anticipated to be completed in late 2012.  Earlier this year, the company also began expansion projects at two of its specialty quartz and ceramics plants in the United States.

“We are committed to growing our specialty quartz manufacturing capabilities to meet the ongoing needs of our global customers in the industries we serve,” said Ray Kolberg, President, Quartz & Ceramics.  “Global demand for high-purity quartz products continues to expand as the photovoltaic and semiconductor production increases, driven in turn by strong demand in these fast-growing markets.

The Geesthacht plant, located at Borsigstrasse 1–7, employs 97 people.  An additional 25 full time jobs are anticipated to be created at the plant once the project is completed.

Momentive’s quartz and ceramics business serves a diverse range of industries including the electronics, solar energy, LED and specialty lighting, and electric vehicle markets.

Together Momentive Performance Materials and its sister operating company, Momentive Specialty Chemicals Inc, operate 104 manufacturing plants and employ more than 10,000 associates around the world.  In Germany, Momentive employs approximately 1,700 workers at various sites.

About the Company

Momentive Performance Materials Inc. is a global leader in silicones and advanced materials, with a 70-year heritage of being first to market with performance applications for major industries that support and improve everyday life. The company delivers science-based solutions, by linking custom technology platforms to opportunities for customers. Momentive Performance Materials Inc. is an indirect wholly-owned subsidiary of Hexion Holdings LLC, the owner of its sister company, Hexion Inc., the global leader in thermoset resins. Additional information is available at www.momentive.com.

About the new Momentive

Hexion Holdings LLC is the ultimate parent company of Momentive Performance Materials Inc. and Hexion Inc. (collectively, the “new Momentive”).  The new Momentive is a global leader in specialty chemicals and materials, with a broad range of advanced specialty products that help industrial and consumer companies support and improve everyday life. The company uses its technology portfolio to deliver tailored solutions to meet the diverse needs of its customers around the world.  The new Momentive was formed in 2010 through the combination of entities that indirectly owned Momentive Performance Materials Inc. and Hexion Specialty Chemicals Inc. The company is controlled by investment funds affiliated with Apollo Global Management, LLC and has more than 10,000 associates around the world.

Forward-Looking and Cautionary Statements

Certain statements, including, without limitation, statements regarding capital spending and hiring plans in this press release are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. In addition, our management may from time to time make oral forward-looking statements. Forward-looking statements may be identified by the words “believe,” “expect,” “anticipate,” “project,” “plan,” “estimate,” “will,” “include” or “intend” and similar words or expressions. These forward-looking statements reflect our current views with respect to future events and are based on currently available data and our current business plans. Actual results could vary materially depending on risks and uncertainties that may affect our operations and other factors. Important factors that could cause actual results to differ materially from those in the forward-looking statements include, but are not limited to: our financial performance and our substantial leverage. For a more detailed discussion of these and other risk factors, see our Annual Report on Form 10-K for the year ended December 31, 2010 and other filings with the Securities and Exchange Commission. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information or otherwise, except as otherwise required by law.

Contact:

Media:

John Scharf
+1.518.233.3893
john.scharf@momentive.com

Peter Loscocco
+1 614.225.4127
peter.loscocco@momentive.com

Investors:
John Kompa
+1.614.225.2223
John.kompa@momentive.com