Bifen XTS is labeled for carpenter ants. Bifen XTS will eliminate carpenter ants that come into contact with treated surfaces. Termidor SC is the more popular choice for carpenter ant control because it is non-repellent, has a delayed reaction kill and has a transfer effect. This means that the ants cannot detect that an area has been sprayed and cannot avoid the treated area, as they walk over the area they pick small particles of Termidor SC up on their body and inadvertently carry back to the colony spreading it to other ants.
Bifen IT typically only take 1 hour to completely dry on a surface and will hold up very well in the rain, but the longer time you can have between application and a rain event the better. However, if a few hours is the best scenario then that is fine. Hopefully, you are in a situation where at least up against the house you may have a slight overhang from the roof or gutters so the application on and directly next to the house will be somewhat protected. Thank you for your kind comments about our products. We appreciate your business!