Dominion 2L and Termidor SC are both non-repellent termiticides. One of the features of a non-repellent is that the product is undetectable by pests--they walk over it and touch it without knowing it, and then they are able to transfer the product to each other eventually wiping out the entire colony of termites or ants. Termidor SC does have a slightly longer residual in the ground. Termidor lasts about 10 years in the ground, and Dominion 2L will last around 7 years. Dominion 2L is a much better deal money wise; you can make double the amount of solution for a little more than half of the price.
Our most popular product for outdoor carpenter ant control is our Carpenter Ant Kit #2. It comes with a product called Dominion 2L which is strictly for outside control of carpenter ants and is a phenomenal product. The kit also comes with some bait to place in the structure if you ever have any issues inside.
Dominion 2L is a great product for termite control. When treating slabs you are supposed to drill where the slab meets the house. The goal of any termite treatment is to completely surround your home around the perimeter of the foundation. To get the product against your foundation where you have a slab you should drill through the slab. If you decide to trench around the slab then you will be leaving this important area against the house exposed to termites.
I am not familiar with a HP Mister or what they could be placing in the wall. Foam is not necessary if you can get to the termites under normal conditions.
Termite bait stations are just a secondary form of protection. A Baiting System will no take care of any termites that have already found wood in your house. They are a preventative treatment only and will only intercept new colonies in the ground coming towards your house. The only way to eliminate termites already in your home is to treat them directly with a liquid treatment.
Please let us know if you have any further questions. You should also read our "How To Do A Termite Treatment" article if you have not already.
You should definitely use Dominion 2L directly on the termites if you know where they are. You would knock the tubes down and spray directly on the beam. It also does not hurt to drill a hole into the beam and treat into the beam directly. However, the bigger issue is that it sounds like you have subterranean termites which usually enter from around the outside perimeter of the home. You can just spot treat the beam, but the more complete answer is to treat around the perimeter of your home completely. This will serve two purposes. If there are termites in other places around your home you do not know about yet, a full treatment should take care of them. Also, if you treat around your entire home, the Dominion will last for 7 years in the soil which means you should be able to live termite free for the next 7 years. You should read our "How To Do A Termite Treatment" article which explains exactly how you can do just as good, if not better of a treatment than a professional company.
Dominion 2L is a non-repellent just like Termidor SC, but it has a different active ingredient. Dominion 2L will last about 7 years in the ground and Termidor SC will last for 10 years. Other then the length of time in the ground, they are both applied the same way. Dominion 2L is half the cost of Termidor SC and that is the main reason why it has been so popular. Dominion 2L is our best seller for termite control as of late and our customers have been very pleased with the results.