Answer
![RonDawson](https://data3.answerbase.com/answerbase/1852/UserFiles/User44682/profileImage44682.jpg?634897245130000000)
Dec 23, 2013 - 09:34 AM
Boric acid dust typically lasts around 8 months if left dry and untouched. If it gets wet, then it is no good. When applied into cracks, crevices, walls, etc, it should give a fairly long life. Only reapply as needed.
Add New Comment![Sending...](https://epestsupply.answerbase.com/images/loading-boxes.gif)