Simple Qusetion, Simple Answer.

 

very. use with screws.

 

Worked great on my fence to hold down the fence posts caps... Otherwise it is real strong and would help secure screws in a box...

 

It's great to use instead of "caulk" to seal the box. Just lay a bead on every joint before you screw the boards together. Even when your done, you can use it as a caulk to seal all the seams inside the box.

Just try and keep it off your fingers. The **** don't come off unless you clean your hands with gas/paint thinner right away. Otherwise, be prepared to use a razor blade to get it off.