SOURCE: Greenstone Holdings, Inc.

December 20, 2007 06:53 ET

Greenstone Presents a Test House for GreenShield After Two Years

NEW YORK, NY--(Marketwire - December 20, 2007) - Greenstone Holdings, Inc. (PINKSHEETS: GSHN) announced today that the two year field test of its unique green product GreenShield™ has been completed. According to the site owners and Management the test was a complete success. Based in part on the results of this long test, the Company is gearing up to meet the demands of the two million dollar new home construction market. In slower economic times, Mr. Sal Miwa, CEO of Greenstone, said, "People want to protect their home investments. They want protection against moisture and fire."

The test was performed as part of the construction of a beautiful 14,000 square foot house located within one of Colorado's best communities in Fremont County. The home owner wanted the best protection for his home and family and was willing to try a new technology to protect against moisture and fire. The test encompassed spraying the entire house with Greenstone's proprietary sealer, GreenShield™. In the two year period, there has not been a single defect or flaw detected in GreenShield's properties. The owner added, "GreenShield did not leave any toxic residue or smell and it was very easy to work with. We even performed a fire test right at our house and were very impressed by GreenShield's resistance to flames. I would recommend GreenShield to any future home owners large or small." (See the photos at

Mr. Miwa said, "Since 2004, we have conducted several different lab tests and field tests on our GreenShield and we are very pleased with the results. This Colorado house was one of the largest. Although the new home construction market is down, we believe it is the right time to introduce new technologies into the market because people have more time to look around."

About Greenstone Holdings, Inc.

( 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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