So far I have used this product inside a home that usually has the AC on, and inside a shower stall where there is a lot of humidity and water, and outside in a shed and I am not disappointed. In all kinds of environment the stuff sticks like some label stick to a jar that you could soak for a year and still not get the label off. I have put items on hooks while using this product that are fairly heavy ( cloth basket holding two shampoos one conditioner bar of soap and a nail brush) holds up very well has not fallen off yet after a year. Outstanding and superb product, holds very very well!