Fix the seam seal use the caulking gun to apply sealant on the inner lip of the gutter segment known as the downhill.
Best way to seal old gutter leak.
Simply squeeze into cracks and holes then apply a further coating around the entire gutter joint.
Some sealer is water based and may do ok in light moisture conditions but it is best if you check the gutter clean the debris and if its wet wait for a hot day so it will be completely dry.
If possible flush out gutters with a garden hose then allow them to air dry for a clean fix.
The bond will not be permanent and the leak.
Water will eventually find its way.
You cannot add more caulking to old.
Lower the uphill piece back into place and press them together for several seconds to make sure you evenly distribute the caulk.
You need to remove the old caulking.
If you have a little standing water try to dam it up away from the.
Get ready to seal.
Replace all pieces that make the seam and then finish by re adding the screws.
Once the caulking is out you need to clean the metal.
Do not use the as seen on tv liquefied rubber in a can sealants that promise the world but in actuality work very.
Do not apply silicone on top of silicone or on top of the old gutter sealant.
A waterproof sealing product such as ge clear gutter caulk available on amazon is easy to use.