How to Fix Leaking Plastic Gutters

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Here in Western New York winter can be brutal. I get a lot of ice buildup on the edge of the roof in the winter. Over time this can cause problems with your gutters.

When you have a leaking gutter it is usually leaking at the seam, this is where two lengths of the gutter are joined together.

I had this problem with my plastic gutters. The leak was at a seam right over the front door. To be honest with you we don’t even use the front door that often. We use a side door off of the driveway that leads into the kitchen all of the time.

Leaking gutters (1)

Here was the problem, our front door is used 100% of the time on Halloween night. Last year was a beautiful clear night for the little trick or treaters, so this leak wasn’t a problem.

The year before however it poured down rain, and every trick or treater that came to our house got just a little more wet. The other problem was that if we had a UPS or FedEx delivery and it was raining, the box would get soaked. So this year I decided that I really needed to fix this leak before Halloween, and any more deliveries.

Here are some simple instructions to fix a leaking gutter seam.

  1. First you want to find a good quality silicone waterproof sealant
  2. Next you’ll have to clean the gutter, make sure there are no debris causing standing water near the seam
  3. Now use an old paint brush to brush away all of the loose dirt away from the seam
  4. You may have to use the edge of a putty knife or small screw driver to clean the dirt out of the seam
  5. Once all of the dirt is removed, wash the seam with a damp cloth, and then use a dry cloth to dry it
  6. Using a caulking gun, apply the silicone sealant to the seam. Press the sealant into the seam with your finger or a putty knife.

Now all you have to do is wait until it rains again to make sure that you stopped the leak, and I’m sure that you did. I hope these instructions were helpful to you.


I like to write about things that I know about. My passion for a good cigar, our family recipes, television, movie reviews, travel, and product reviews. The products I review are goods that I own and have used. I’m a Industrial Engineer working in the automotive business. When I’m not working or writing I spend as much time with my beautiful grandchildren as I can, Bobby, Tyler, and Giada. Thanks for stopping by and I hope you enjoy 🙂


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Author: Jackie Jackson

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