If the putty completely solidified water should not be able to go through it.
Rain gutter corner leaking.
If you have a little standing water try to dam it up away from the corner using a sponge or an old rag.
And the seam where they meet is a natural weak point in the system.
You need to remove the old caulking.
Cut the caulk with a utility knife.
When they fail to do.
Second story gutter corner leaks might not be easy to spot from the ground.
Pull it off the gutter with your fingers or a pair of needle nose pliers.
Ask your third guy to use butyl sealant or a tar based asphalt sealant and spread it at least 1 past the corner on each side.
If you notice that there is still water leaking add putty on the area of the gutter leak.
You first need to clean your gutters thoroughly.
Corners are the places where leaks will most likely form.
You can check yourself.
Also have him check to see if the eavestrough has sufficient slope to allow water to flow quickly toward the downspouts.
One reason is because all corners must consist of at least two pieces of guttering that are affixed together.
The bond will not be permanent and the leak will eventually return.
Why gutter corners are troublesome.
To make sure that you have completely repaired your gutter pour water down your gutter then check if there is water leaking from the crack.
Repair leaking joints with silicone caulk.
Leaking at the corners may be a sign of standing or accumulating water.
If water is leaking where the gutter and downspout jointly connect repair the joint connection.
The purpose of all rain gutters is to move water away from the base of your house.