To remedy this issue i installed backer rod in the gap that i then covered with concrete crack sealant.
Seal gap between siding concrete block.
This moisture is behind the siding and a result of everything from complex factors like vapor pressure to things as simple as water penetration at caulk joints and window and door trim.
Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk.
Paintable silicone caulk can be used around the outside of window units to properly seal the window and the siding edge or around the entire door unit.
Between a tub and tile countertop and backsplash or window.
Paint works well over it.
Do not seal this juncture as you will be blocking an exit for any moisture that is trapped between the back of the siding and the tar paper.
There should be wood behind the siding.
How to seal and fix a gap between foundation and concrete sidewalk or patio.
Then i would try to place some el shaped flashing on the bottom of the siding.
The best solution here may be to clean up that area of all debris let it be fully dry and then apply a bead of qood quality exterior grade caulking material.
All it takes is backer rod and concrete flex sealant.
Since some of the siding looks like it will need re priming and painting make sure that you use a paintable type of caulk.
Caulk is used to create a waterproof or insulating seal between building materials.
Making sure that the flashing does not extend past the lip of the siding.
Gray butyl caulk is about the best weatherproof sealant for joints that move it is what they put in the joints on parking decks.
Note that there are various types of caulk.
This will hopefully be the fix that keeps that wall of the sunroom nice and dry.
The problem with sealing between dissimilar materials is that they will move differently in heat and cold so the joint needs to be very flexible.
Use around sinks tubs and showers.
Examples where caulk is used to fill a gap include.
Simply apply this inexpensive filler into the cracks to seal.