Termidor is an effective termiticide used for termite control. It's also registered for external use for control of spiders, ants and other common insect pests.
So....What makes it so good?
It does not repel insects, so they inadvertently come across it, pick up the chemical and die. Due to its slow acting nature, it also allows the insect to pass it onto others if it's social by nature. So a good treatment won't just kill some of the ants, it will kill a whole colony!
Termidor is not commonly used by pest controllers in general pest situations as it is too expensive (for them!) and would rather use a cheap insecticide or generic knock off.
Our experience has shown, however, that it's worth the extra cost and time in ensuring a proper Termidor treatment. Its effectiveness both short term and long term is shown clearly by the following examples.
The ants in th following video were eradicated over a week after a Termidor spider treatment was applied. There weren't any ants in the vicinity during the treatment, it was only well after the treatment was applied that the ants came into contact with the insecticide. Had it been repellant, they would have most likely just avoided the area.