Does de-icer have a shelf life?

Yes, de-icer does have a shelf life, though it can vary depending on the specific formulation and storage conditions. Generally, most liquid de-icers can last for several years if stored properly, while solid de-icers like salt can remain effective indefinitely if kept dry and free from contaminants. It's important to check the manufacturer's recommendations for specific products. If a de-icer appears clumpy or has a strange odor, it's best to dispose of it.