Got a picture?
#1 If there's that much air getting in I'd concider removing the casing and use some low expanding foam, replace the casing then do the caulking.
You could just put some on you finger and work it in then wipe with a damp sponge.
Or just buy a small plastic tube of it it that's easyer for you.
#1 If there's that much air getting in I'd concider removing the casing and use some low expanding foam, replace the casing then do the caulking.
You could just put some on you finger and work it in then wipe with a damp sponge.
Or just buy a small plastic tube of it it that's easyer for you.