Guardian has been tested to the Australian Standard 2331 which requires the product to survive a 1,000 hour neutral salt spray test. This test is an accelerated corrosion process that takes place in an enclosed chamber. The spray is saltier than sea water and the temperature is maintained at +35ºC with almost 100% humidity.
Passed. Guardian is one of very few complete security screens that have passed the test – most manufacturers only test the mesh. Guardian's 304 stainless steel mesh has actually survived a 3,000 hour salt spray test.
Prowler Proof is the most corrosion-resistant screen on the market. Quite simply because it is welded instead of being held together by screws or rivets. Whenever two different metals interact there's a risk of corrosion.