Cy-Kick CS is a great product, but Termidor SC is the preferred product for your situation. Termidor SC is a non-repellent insecticide that also has a transfer effect, this means that the ants will not know that Termidor SC has been applied, and therefore cannot avoid the treated area and as they come into contact with other ants they will spread the insecticide and wipe out the colony. Termidor SC can also be used for drywood termites. It is important to remember that you must apply the product into the spaces that these termites will actually come into contact with it. That could mean that you would need to drill into the wood or possibly even foam the product into the space.We have never had a complaint about the smell of Termidor SC and the MSDS says that it is odorless.
You should perform a liquid termite treatment in the ground to get the termites where they are entering the shed. To perform a treatment just as a professional company would do, please read our How To Do A Termite Treatment Article which explains exactly how you should treat your home properly. Doing a treatment like what is described in the article will not only take care of existing termites that you have, but it will also protect and prevent future termites from entering for about 7 years. Even though the article talks about a home, the shed is no different. You should dig a trench around the structure as described in the article below, as well as try to trench around individual supports under the shed if possible, if any exist.
Here is a a link to the article: http://www.domyownpestcontrol.com/termite-treatment-c-3_352.html
Please let me know if you have any further questions.