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Life Span
Rubber won't degrade as fast as wood chips or other organic mulch. It doesn't rot or decompose like other types of mulch, and gardeners have found that it doesn't have to be maintained or replaced as often as other types of mulch. As with the tires on an automobile, rubber mulch can withstand the elements through almost any kind of weather.
Weight
Organic mulch such as sand or grass clippings tend to wash or blow away. Rubber mulch is a combination of rubber and metal materials, making it heavier and more resistant to winds and rain. And because it usually stays put, there is far less need to continually fill in the places where organic materials would be disappearing.
Pests
Because rubber mulch isn't made of organic materials, it won't attract insects and other pests. Carpenter ants, termites and other bugs that typically infest lawns and gardens will be disinterested in eating or living in the synthetic material.
Environment
Some make the switch from organic to rubber mulch as a way to recycle old tires rather than burning them or throwing them into the trash. It's more environmentally friendly to dispose of tires by using them for mulch. An added benefit is the small amount of zinc present in mulch that may help balance the pH levels in your soil.
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