SOURCE: Greenstone Holdings, Inc.

March 25, 2008 16:05 ET

Greenstone Introduces GreenShield "Sillpro™" for Protecting Window & Door Sills

NEW YORK, NY--(Marketwire - March 25, 2008) - Greenstone Holdings, Inc (PINKSHEETS: GSHN) announced today that the Company introduced a new GreenShield™ product, "Sillpro™," which can be brushed onto wooden windows, door sills, and other components to protect them from moisture and water penetration. Once it is applied it can be painted or stained.

Sal Miwa, CEO of Greenstone, said, "Sillpro creates a composite-like shield that repels water and moisture." Mr. Miwa added, "Its application is very quick and easy. Sillpro is ideal for protecting north-facing windows and doors that don't get enough sun."

About Greenstone Holdings, Inc.

( 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 "green" solution to protect wood-based building materials such as lumber, logs, plywood, drywall, railroad ties, fencing, and utility poles from destructive environmental elements. It also offers added fire retardancy to the material it is applied to. The $25 billion water damage market is just one example of the perfect niche for GreenShield. Greenstone also exclusively distributes Green-Dri™, a revolutionary biological dry kiln for drying wood; Permeate™, a very unique anti-corrosion sealer paint for metal, concrete, and other construction materials; MagneLine®, a very strong polymer cement mortar used to reinforce and/or repair metal and concrete structures such as bridges and highways; and Crystal-Guard™, an innovative chemical to make asbestos harmless and recyclable.

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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