Use a small.
How to seal vinyl siding to concrete.
Test the acid solution before using it.
Let the caulk dry overnight then partially fill the boot with foam.
The vinyl siding as seen from inside the crawl space.
Don t use a synthetic bristle brush the acid dissolves the bristles.
A wall or siding needs special detailing to prevent leaks and damage where the wall encounters any horizontal surface such as a foundation wall top or a concrete porch slab.
I believe you have tar paper under your siding based on your description.
Add vinyl siding strips until you reach the end of the wall then measure and cut the last strip to leave 1 4 inch space at the end.
Find the entrances mice use to enter your home.
Theoretically you could seal the tar paper to the foundation with foam spray caulking something similar.
How to seal siding to keep out mice.
This article series provides details of foundation tops building walls exterior trim wall corners and roof wall intersection flashing to prevent leaks water damage.
Seal the hole from the inside as well.
The grey color visible in the picture is the back side of the vinyl siding.
Not a vapor barrier as you say but it prevents water that makes it past the siding from getting any further into the wall.
Use the cut off piece to start the next row of siding.
It s safe for vinyl but your siding may not be 100 percent vinyl.
You may need to tape the rubber to the siding temporarily until the caulk dries.
Maintaining good clearances between finish grade and siding materials of all kinds is crucial to preventing this kind of damage.
Look under the siding at the area meeting the foundation of your home for holes and gaps.