SOURCE: Greenstone Holdings, Inc.

November 15, 2007 09:45 ET

Greenstone Becomes Exclusive Importer of MagneLine™

NEW YORK, NY--(Marketwire - November 15, 2007) - Greenstone Holdings, Inc. (PINKSHEETS: GSHN) announced today that the Company signed an exclusive importer agreement with Magne Corporation (Magne), a Polymer Cement Mortar(PCM) manufacturer based in Dazaifu-City, Japan. Under the Agreement, Greenstone will be representing Magne with respect to marketing its PCM product line -- MagneLine™ -- in the United States.

This will be the first time that MagneLine has been introduced to markets in the United States. Primarily used on buildings, highways, and bridges to reinforce cement and metal structures, MagneLine has been on the Japanese market since 1988. Due to MagneLine's impressive strength, it has been used on over 400 bridges in Japan, to add extra strength for "quakeproofing" because of Japan's earthquake susceptibility. MagneLine's key features are its adhesive strength, degradation resistance, and ease of application. (see our brochure http://www.egreenstone.com/documents/MagneLine-70911C.pdf )

Sal Miwa, Chief Executive Officer of Greenstone Holdings, Inc., said, "The MagneLine products are perfectly synergetic with our Permeate line of products which prevent corrosion so that in many applications, both MagneLine and Permeate can be used. The American Society of Civil Engineers reported that it will take an estimated $188 billon to fix the 578,000 structurally deficient bridges in America. MagneLine is an ideal, economical solution for those projects and Greenstone is looking forward to introducing this product to the bridge construction market in this country, immediately, to help prevent more bridge tragedies."

About Greenstone Holdings, Inc.

(www.egreenstone.com) Through its operating subsidiaries, Greenstone 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 a solution for environmental protection for wood based building materials and others such as lumber, logs, plywood, drywall, railroad ties, fencing, and utility poles. It also offers added fire retardancy to the material it is applied to. The $25 billion water damage market is one example of many which GreenShield can find a niche in. Greenstone also distributes Green-Dri™, revolutionary biological dry kiln for drying wood, Permeate™, a very unique chemical sealer for metal, concrete, and other construction material, and MagneLine™, a very strong polymer cement mortar to reinforce metal and concrete structures such as bridges and highways.

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 effecting 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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