Command strips are not fully waterproof, rather they are water resistant, they are great for using in areas where they may be indirectly exposed to water from time to time (such as in a bathroom) but do not perform well long term if they are routinely soaked (such as in a shower cubicle or a bath).
Are Command Hooks waterproof?
Can you hang Command Bath Products in a shower? Yes. Command Bath Strips are water-resistant and hold strongly in humid environments.
Will command strips hold in the rain?
Command™ Outdoor Adhesive Strips are water- and UV-resistant, and specially formulated to withstand most weather conditions including rain, snow, and extreme temperatures.