I have used this stuff and had Great sucess, comes with gloves and siccors to cut the tough stuff,WEAR the gloves when handling, this stuff is like shaking hands with a chainsaw, IT will cut you.
Sprial around pipes open hole and back fill with foam, have had NO entry since.
We are surrounded by fields, had been averageing 5-20 mice per day in the buildings, now down to 1 mouse per day, since all the holes/spots have been sealed with this stuff and sealed.
See info here:
http://www.ebay.com/itm/290953813370?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT#ht_735wt_908
Tia,
Don
