I am sure it is. Supper Hubby was able to seal up the window in the laundry room to stop mice from getting in. (Much to the dismay of the cats) I, however, have a trigger happy finger and tend to "overdo" stuff that involve gun like objects. LOL Want to make sure I am able to control the spray and not shoot it all over the place. I am not allowed to hold a caulking gun! There was caulk all the up on the ceiling on my first attempt at redoing the bathroom at my parents house!