We would highly suggest trenching and treating instead of only treating inside the cinder block wall. Termidor is meant to bond to soil and be applied into the ground. It will not last very long just treating into the cinder block walls. Cinder blocks are also very porous, so they will soak up a lot of the termidor and you might get a few months of protection instead of 10 years when applying it into the ground.
You should follow the instructions as outlined in our How To Do A Termite Treatment article to treat the exterior and underside of your crawl space.
We would recommend doing a trench treatment around your home for an active infestation of termites. We have a helpful article on How to Get Rid of Termites that we recommend reviewing for the best advice.
Please be sure to read the product label of any insecticide you choose to use to get information on the needed personal protective safety gear you will need. In most situations it is recommended that you wear long pants, a long sleeved shirt, closed toe shoes with socks, chemical resistant gloves and goggles. In areas where ventilation is poor a manufacturer may recommend you wear a mask or a respirator. We have put together 2 different safety kits that will make selecting correct safety gear easier for you.
No, Regardless of what treatment you are doing Termidor SC can only be mixed at .8 fl oz. per gallon of water. Termidor SC is a non-repellent, if you mix at a stronger strength than labeled you run the risk of taking away its non-repellent properties. Always mix at .8 oz to a gallon.
Depending on how heavy the rain was will depend on if you will need to reapply. If the rain was only light and you had just completed a Termidor treatment in a trench for termite prevention then you should be fine. If it was a heavy rain for a long period of time then you may need to reapply. If you were using the Termidor to spray around the perimeter of your home for ants and general insects, then you will likely need to reapply it on a day when no rain is expected for at least 24 hours.
Termidor SC should only be applied outside within 1 foot of a house or other structure. You also should not apply Termidor SC near edible plants. We would recommend to keep Termidor applications at least 10 feet from the garden.
While Termidor SC will kill fleas that contact it, we do not recommend for flea control. Termidor cannot be applied to all the areas needed to treat for fleas. We recommend to treat the kennel with the indoor/outdoor flea kit.
If kept out of heat and sunlight the shelf life of Termidor SC is 3-5 years.
To apply Termidor SC to a home with a pier and beam foundation, you will need to trench around each pier. You will need to trench around any point where a support for the home touches the home. If the piers are hollow blocks you also have to drill a hole in each pier to treat the inside space where termites could potentially travel up without hitting the treated soil around the pier.
We reached out to the manufacturer BASF for an official answer on this verbiage on the Termidor SC label. Here is what they stated.
“Not using termiticides in voids with Rigid foam insulation” is EPA required language that dates back to times when soil termiticides contained organic solvents/adjuvants which helped them remain in solution long enough to be applied but also damaged rigid foam insulation (think DDT, Heptachlor, Chlordane, or Dursban times; e.g. Pre-Termidor products from the 1950’s through 1990’s). In 1996, the EPA mandated that the language be on all liquid termiticide labels moving forward (regardless of whether the product contained solvents or emulsifiers or not). Termidor products do not contain any caustic emulsifiers or solvents that would damage/ “eat up” the rigid foam board (as the 80WG, SC, HE lines are all water soluble).”
This also applies to the generic equivalent on the market under the branding Taurus SC. If you are needing to foam into the foundation void area where there is foam rigid board, they recommend using the Termidor Foam Aerosol as this labeling does not have that verbiage and restriction on it for use.
Termidor SC should not be applied to flowers or shrubs. It is only applied in the soil up against the foundation of the structure for termite control (in a trench, rodded, drilled holes in concrete) or ant control topically (1 ft up and 1 ft out).
Termidor SC can be toxic to Millipedes. When applied per label, Termidor will not harm plants. Be sure to keep all children and pets out of the treated area until dried.
While Bifenthrin can show repellent qualities to some insects, it is not considered a "repellent". You can use Bifenthrin based products indoors. It will not pose a threat to your Termidor Treatment outdoors. You do not want to apply these types of products in the same area, as in on top of one another.