I have a sunroom which is right next to the siding of my houses:
However, as shown below, there are some gaps between the siding and the sunroom, and some bees go inside the gaps and make holes.
I’d like to block the gaps so that bees can’t do any more.
I am not the original owner, and my house was built 25 years ago. I found that there is some sealant (a bit dark gray) between the siding and the sunroom, but the sealant between them is disconnected because the sunroom might have moved a bit, I guess.
Can you guess what the material of the sealant is? Do you think Plumber’s Putty could be applied on top of the existing sealant? Would you recommend any products or any approach for my situation?
I am very worried about holes bees make because I found that some holes were very deep and the wooden post in the overview got a bit rotated for some reason.
Thank you so much for your advice in advance.
I bought this house about two years ago, and I am very new to house care even though I am trying to keep learning.
Many thanks to @FreeMan, @isherwood and @JRaef for recommending latex caulk, butyl rubber caulking, and duct seal. However, I am still very confused because they all seem very different to me.
Is there any way of me telling what the material of the sealant is (kind of) exactly? or all of them (latex caulk, butyl rubber caulking, and duct seal) should work well in my application and I can pick any of them? e.g., "latex caulk" with "backer rod" should work for gaps of 1.5 inches?
Let me add some more pictures for your understanding.
gap_ruler.jpeg: gaps are wide up to about 1.5 inches.
shape1.jpeg, shape_round.jpeg, and shape_cracked.jpeg: the pictures show cracked, rounded and different shapes.
sample.jpg: I took a piece.
Please let me know if any more info needs to be provided.
Thank you so much again.