Test the acid solution before using it.
How to seal vinyl siding to concrete.
Use minimal expanding foam to avoid opening the slit in the rubber boot and push the tip several inches in so the foam expands into the hole instead of out the top of the boot photo 4.
Seal the hole from the inside as well.
Not a vapor barrier as you say but it prevents water that makes it past the siding from getting any further into the wall.
Look under the siding at the area meeting the foundation of your home for holes and gaps.
I believe you have tar paper under your siding based on your description.
Theoretically you could seal the tar paper to the foundation with foam spray caulking something similar.
This article series provides details of foundation tops building walls exterior trim wall corners and roof wall intersection flashing to prevent leaks water damage.
The grey color visible in the picture is the back side of the vinyl siding.
Maintaining good clearances between finish grade and siding materials of all kinds is crucial to preventing this kind of damage.
Use a small.
You may need to tape the rubber to the siding temporarily until the caulk dries.
Crawl around the exterior of your home and use a flashlight to find cracks holes and gaps.
Find the entrances mice use to enter your home.
The vinyl siding as seen from inside the crawl space.
If it s safe spread it liberally in the concrete with a natural bristle paint brush.
Let the caulk dry overnight then partially fill the boot with foam.
How to seal siding to keep out mice.
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.
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.