Termidor SC would only be applied inside if using to spot treat an active infestation per the product label. It cannot be used for prevention inside.
You do not have to treat all of the hollow block walls, only the bottom 2 where the termites could come through the soil with Termidor SC.
We do not advise using a hose sprayer for application as the label recommends to be applied with a hand pump sprayer.
In the areas where you cannot treat with a liquid treatment such as Termidor, we would advise using a termite bait station such as the such as the HexPro Termite Baiting station. This will help you keep areas that cannot be treated with the liquid treatment monitiored.
Termidor SC can only be applied one foot up and one foot out directly around the exterior of a structure 2-4 times per year or in a trench for termites. It should NOT be applied indoors or to trees, plants or lawns.
Unfortunately, for Termidor SC to be used as an effective barrier for your home against subterranean termites you would need to use it around the entire perimeter of the structure using the trenching method.
Please see the termite treatment video attached for more detailed instructions.
Termidor SC will kill carpenter bees, but it really is only labeled to be applied 1 foot up and 1 foot out around the perimeter of a structure. It would be better to use our Carpenter Bee Control Kit instead.
Insecticides should not be exposed to extreme temperatures such as freezing or over heating or left for prolonged periods of time in direct sunlight. In the case of Termidor SC, after it has thawed at room temperature if it goes back into a solution (the way it looked at the time of purchase) it should be fine to use. However, if it appears discolored or if the consistency of the product has changed it should be discarded and replaced.
For Termidor SC to work on Drywood termites, you have to drill directly into the piece of wood the termites are in and inject Termidor into the wood. Termidor does not penetrate into wood, so you have to inject it into the center. It has to touch the termites to work, but the benefit is that it only has to contact a few termites, and then they can pass it on to the rest of the colony.
For Drywood termite treatments on wood, we recommend applying a product called Bora-Care. This product is applied to raw wood and penetrates further than any other product.