Water will eventually find its way under both layers of silicone and back to the original leak location.
Best way to seal a leaking gutter.
Lower the uphill piece back into place and press them together for several seconds to make sure you evenly distribute the caulk.
Replace all pieces that make the seam and then finish by re adding the screws.
Do not apply silicone on top of silicone or on top of the old gutter sealant.
Squeeze a bead of sealer along the seam joint and then smooth the sealer to allow easy flow of water through the gutter.
This old house general contractor tom silva has a fast fix for a dripping rain gutter.
It is a rubber coating that is relatively cheap and does a good job in sealing any gutter leak this products seals leaks and cracks in your gutter effecitvely with a water tight and paintable finish.
Here s two ways to not repair a leaky gutter and one solid way to do the job correctly so that it holds for years not weeks.
This means the caulk will not shrink as it cures.
If you want a very effective way to seal your gutters the rust oleum leak seal is the best gutter sealant.
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.
Also when installing the gutter flashing don t worry about overlapping some sections if they are necessary at least as long as they don t compromise the system in some way.
See pic for reference.
Try to avoid the clear as the uv rays from the sun break it down quicker.
See below for a shopping list and tools subscribe to this old house.
Fix the seam seal use the caulking gun to apply sealant on the inner lip of the gutter segment known as the downhill.
Using a small trowel a gutter scoop or your gloved hands clear.
Apply a gutter sealant on the interior seams to ensure that the gutter is leak proof.
If they are full of sodden leaves and smelly muck it s likely that your problem isn t so much a leaking gutter as a spillover.
In the category of professional caulking compounds the polymer and tri polymer caulks are excellent choices for repairing leaky gutters and sealing new gutter installations.
Use a little water to spread it out nicely.