Harlan from Phoenix, Az writes
Aside from the moisture resistance of Delta dust, which has longer residual life, Delta dust of Tempo dust? This will be going inside a new wall being built and may never get treated again, but at least will take care of whatever crawls in there now.
Tempo Dust can remain effective up to 1 year if left undisturbed. Delta Dust can remain effective up to 8 months. If you want to apply a dust with the longest residual effectiveness Cimexa Dust can last up to 10 years if undisturbed.
Answer last updated on: 03/30/2016