Note that there are various types of caulk.
How to seal siding to concrete.
Use a small.
I believe you have tar paper under your siding based on your description.
The temperature also needs to stay above 50 f during application and drying time up to three days.
Crawl around the exterior of your home and use a flashlight to find cracks holes and gaps.
Look under the siding at the area meeting the foundation of your home for holes and gaps.
It will eventually degrade if exposed to sunlight.
Buy yourself a caulking gun learn how to mount and open a tube of caulk and go to it.
My recommendation in this scenario would be to trim the wood siding 1 4 inch minimally or better yet 6 to 8 above the concrete area.
Before applying check the weather.
Might be good but it s more designed for sealing air insects and separating wood from concrete.
How to seal siding to keep out mice.
If your concrete is new you ll need to let it cure wait at least one month before applying sealer.
Your first attempts won t come out very well messy lots of holes goop all over the concrete and the wood stiff fingers and sticky stuff all over your clothes and hands.
If you go inches which you should install aluminum flashing for example.
Most ties when it s used in construction it s completely covered by siding or similar.
Sealer needs to be applied in dry conditions because it won t adhere to damp concrete.
Find the entrances mice use to enter your home.
Not a vapor barrier as you say but it prevents water that makes it past the siding from getting any further into the wall.