Polyurethane Compounds Demonstrate Superior Performance in Heat Aging and Ozone Testing

BOULDER CITY, Nev., Feb. 9, 2005 -- Amerityre Corporation (BULLETIN BOARD: AMTY) . In heat aging and ozone testing designed to evaluate a tire's long term durability, Amerityre's polyurethane tire compounds have outperformed comparable rubber compounds. The tests was conducted by an independent laboratory in accordance with ASTM International test standards.

Since the enactment of the Transportation Recall Enhancement, Accountability, and Documentation (TREAD) Act in November 2000, the National Highway Traffic Safety Administration (NHTSA) has been studying the effects of ozone exposure and tire heat build up and aging on tire performance. At present, the NHTSA has deferred adoption of an aging effects performance test until it completes its research and issues new proposals. However, the NHTSA has stated that it intends to develop and propose an oven-aging test for FMVSS 139, the safety standard relating to highway-use tires, taking effect in July 2007.

Amerityre has developed proprietary compounds and patented manufacturing methods and processes for making passenger car tires out of polyurethane. The results of the Amerityre polyurethane material testing are significant in that they demonstrate that Amerityre polyurethane compounds show minimal changes in physical properties as a result of extended exposure to heat and ozone.

Amerityre reports that the tested polyurethane material [70 Shore A hardness, under ASTM D573] demonstrated a nominal increase in hardness of zero to 2% after 70 hours of testing at high temperature [100C or 212F]. Tests on comparable rubber compounds showed increases in hardness ranging from 12% to 20%. In ozone testing [50pphm ozone, under ASTM D1149], the polyurethane material had no cracking after 144 hours, while the rubber compounds showed initial cracking as soon as 30 hours. Increased hardness and cracking are both indicators of potential performance degradation.

According to Richard Steinke, Amerityre's President and CEO, the test results demonstrate that the use of Amerityre's polyurethane materials could be a very effective solution in helping tire manufacturers combat the effects of heat aging and ozone exposure on tires. Mr. Steinke believes that the use of Amerityre's polyurethane materials can be expected to produce a tire with better and more consistent performance over the life of the tire.

For more information on Amerityre, visit its website at www.amerityre.com.

Certain information contained in this press release may constitute forward-looking statements. Such statements are made based upon current expectations that are subject to risk and uncertainty. Amerityre does not undertake to update forward-looking statements in this news release to reflect actual results of and changes in assumptions or changes in other factors affecting such forward-looking information. Specifically, the results of the above testing are for heat aging and ozone exposure factors and, as such, may not be indicative of the results under a complete aging effects performance standard if such a standard is developed and adopted by the NHSTA.