If possible go with a caulk that is specifically formulated for gutters.
How to seal aluminum gutters.
You can buy gutter caulking compound online.
If there is a functionality issue with the aluminum where the joint is moving around no amount of sealant.
For sealing and joining lap seams in aluminum or vinyl gutters and downspouts we recommend a permanently flexible and water resistant sealant.
Gutter sealer comes in squeezable or in calking gun tubes and the price can run you from about 5 to 10 depending on the amount and quality.
Apply silicone or special gutter caulking compound along the seams on the inside and outside to seal the leaks as shown above.
Gutter sealing happens from the inside of the gutter.
Gutter caulks are designed to work in the conditions gutters face and as such they last much longer than non gutter caulks.
Use a putty knife to spread the cement generously around.
A waterproof sealing product such as ge clear gutter caulk available on amazon is easy to use.
One of the most common repairs we complete out in the field is to seal leaky gutters.
If the hole is small you can use plastic roofing cement.
If you have white gutters use a white caulk.
Applying sealer to rain gutter joints.
Learning how to fix leaky gutters is an easy inexpensive project you can do yourself.
Simply squeeze into cracks and holes then apply a further coating around the entire gutter joint.
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.
If the metal gutter parts have rusted through you can quickly and easily patch it.
Allow the insides of the gutters to dry out and brush leaking seams clean.
If your gutters are painted in another color choose a clear caulk.
It creates a powerful and waterproof protective seal making it perfect for repairing not only gutters but also doorframes windows vents toys appliances gaskets weather stripping and even clothing.
If it is large use a piece of galvanized metal flashing.
Patch small holes with roofing cement.
This old house general contractor tom silva has a fast fix for a dripping rain gutter.
See below for a shopping list and tools subscribe to this old house.
You should never need to apply sealer to the outside of the gutter.