SOURCE: Greenstone Holdings, Inc.

October 22, 2007 09:18 ET

Greenstone Looks to Crack $276 Billion Corrosion Market With Introduction of Permeate™ HS-100

NEW YORK, NY--(Marketwire - October 22, 2007) - With sights set on slicing out a piece of the $276 billion U.S. metallic corrosion market, Greenstone Holdings, Inc. (PINKSHEETS: GSHN) introduced a new product line, Permeate™, as its exclusive US agent. Permeate™ HS-100 is a corrosion protection sealer developed and manufactured by D&D Corporation in Japan. This product, an inorganic silicate sealer, is a special chemical designed to enhance corrosion-resistant coatings on metal surfaces. With its high fluidity, Permeate penetrates through micro-pores on metal coating created during the coating process and protects it from exposure to water, acid, salt, and other harmful chemicals. Sal Miwa, Chief Executive Officer of the Company, stated that this product can play a significant role in preserving our infrastructure assets such as bridges, highway supports, large gas and fuel tanks, aircraft, and ships where it is critical to preserve its long-term structural integrity.

"We are pleased to market this line of products which could help avoid catastrophes like the Minneapolis bridge collapse. It is a sizable market. According to the Federal Highway Administration's 2001 report, just the metallic corrosion cost of bridges in the US is over $8 billion," said Miwa. (http://www.egreenstone.com/documents/Permeate-metal_HS-100PM-70801C.pdf)

About Greenstone Holdings, Inc.

Greenstone Holdings (www.egreenstone.com), through its operating subsidiaries, is in the business of providing a variety of unique chemical technologies that are primarily used in the building and construction industry. The Company's first brand name product, GreenShield™, offers building materials such as plywood, drywall, and lumber protection from the environment. It also offers added fire retardancy to the material it is applied to. GreenShield™ covers a wide range of applications such as wooden building material, fencing, railroad tie, and utility pole.

Forward-Looking Statements:

Safe Harbor statement under the Private Securities Litigation Reform Act of 1995: Except for historical information contained herein, the matters discussed in this press release are forward-looking statements that involve risks and uncertainties, including but not limited to economic, competitive, governmental and technological factors affecting the Company's operations, markets, products and prices and other factors discussed in the Company's various filings with the Securities and Exchange Commission.

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