It depends upon the materials and construction of the panel. However, most quality panels are waterproof in nature as they are meant to be used in the bathroom. You should look for this specification or ask the manufacturer regarding this before picking one. A waterproof panel will be durable and easy to maintain. Hence, it is good for the waterproof type. Even if you spend on some lower quality now, you might have to replace it later. So, pick a quality waterproof panel now!