Slowly move down the joint to apply a steady bead of caulk into.
Seal small space between wooden siding.
Use to install wood paneling without nails.
Sealing for natural weathering.
The proper approach to this is to install vertical strips of wood over the cracks from the outside.
Correctly sized backer rod a bond breaker and properly applied sealant is the appropriate way to handle the joint between dissimilar materials with different coefficients of expansion both thermal and moisture such as wood trim and cement plaster.
Fill in gaps between crown moulding and baseboards.
The siding expands and contracts with temperature and humidity.
I would be hesitant to seal the siding to the foundation.
Do not try to use caulk between all the boards.
How to seal siding to keep out mice.
Smooth the caulk bead with your finger and begin caulking the joint between the fascia board and the soffit also known as the eave.
You can choose to use something like 1x2 inch cedar strips.
It will look like crap and on top of that like you already indicated it will be hard to put in there in the first place.
Use a small.
It needs to move and breathe.
Use latex painter s caulk inside of doors and windows or to quickly fill cracks and holes in drywall.
If you prefer weathered cedar s grey color but want a more uniform color than what comes naturally you can seal the cedar using bleaching oils.
Seal a door frame in place and seal the subfloor at the bottom of a door frame.
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.
Think of a wood home as a living thing.
Leaving your cedar exposed to the elements for weathering can damage the cedar especially in excessively wet climates.
Find the entrances mice use to enter your home.
In my opinion caulking between the seams in any lapped siding either horizontal or vertical is not good practice but not just because of any potential vapor barrier effect.