Does Lye Water Expire

To ensure the lye works properly, we recommend using it within one year of purchasing. It needs to be sealed tightly and stored in a dry place. Lye is hygroscopic, meaning it attracts moisture. If it’s exposed to moisture in the air it won’t be as effective in your recipe, and the soap may not saponify fully.

Can lye water be stored?

Plastic. The right kind of plastic container is the best choice for mixing and storing lye solution. Some plastics are resistant to alkali, others are not, so it is important to KNOW, not guess, what a plastic container is made of.

Can you reheat lye water for soap?

You can safely reheat lye water when making soap, but you need to be careful. Heating it on the stove top can be dangerous and even microwaving it can cause problems. They trick is to heat it in a safe place and slowly. The best way to reheat lye solution is to use a hot water bath.