Best Gutter Sealant in 2024

The best gutter sealant reviews

Below are 5 of the best gutter sealant reviews you can find around. Have a look at these and decide which one is best for your gutter. You can also use these for your eavestroughs and the below options are also described in the literature as the best silicone for gutters. Note that there are several types of gutter sealants to choose from, and many come with guarantees that they will work for a certain period of time. Obviously, finding the right gutter sealant is not always easy. That’s why we put together a list of some of the top brand gutter sealants.

What is a gutter sealant?

A gutter sealant is a material that is used to prevent water from leaking into the walls of your home. It covers the seams between roofing and siding, and it may also be used to seal around windows and doors.

How do I know if my gutter needs to be sealed?

If you see water leaking from the seam between your roof and your siding, or if you have a leak where windows meet the exterior wall, it’s probably time to apply a gutter sealant.

What to use to seal leaking gutters?

There are many ways you can fix a leaking gutter. Some use cement, others some glue, and some just go and replace the whole gutter. However, you can also use one of the best rain gutter sealants available out there. These work great and are tailored to fix your problems.

Gutter sealants are good when you have small holes in your gutter. You just buy a sealant, fill the holes whit it and you are done. Obviously, there are times where you may be faced with bigger holes. In this case, you need to use a glass-fiber filler or a combination of the glass fiber and sealant. As the last resource, and you need to appreciate this by yourselves, if your gutter is in really poor condition, you may be better off replacing it altogether.

Note that you may also use the below products as the best gutter seam sealant.

Choosing the best gutter sealants

Below are the different points you need to follow to select the right sealant for your gutters.

Select The Type of Gutter Sealant you want – Rubber sealant or silicon caulk

First, find out what type of gutter sealant you want for your project. Please see the different types of sealants we have selected for you below.


If you only have a small leak, it can seem like a waste of money buying a product that you won’t be able to use again. Fortunately, gutter sealants are designed for a variety of surfaces, from roofs, wood, concrete, metal, boats, chimneys, and more. Note that gutter sealing enhances the life of your most valuable asset, which is your house.

By ensuring there is no gutter leak, you are effectively protecting your asset. And by using a versatile sealant, you can reuse it on different surfaces, so you are not investing in vain, but in a product that can solve a multitude of problems around your house. That’s why selecting some versatile sealant is important, though you still have the option to only focus on a product that can only be applied to your gutters.

Drying Time

The drying time depends on the product at hand. Some products take 24-48 hours, while others can dry in as little as 30 minutes. If you want to apply over your sealant and don’t want to wait long for it dry, it is always best to select a quick-to-dry sealant. However, you need to understand that the sealant that dries quickly is not the best one to use. So best for you to select a slow drying product that will last longer.

Adhesion Strength

When it comes to durability, there are a number of things to consider. Does the product have UV ray resistance? Can it withstand water and salt? Will it stay put under extreme temperature changes? This is where adhesion comes in. Be sure that the product you’re using is resistant to these elements.


This is an extremely important factor for a sealant. You will want to buy a product that can deal with some small structural changes (when the house starts to age, it will move a bit), temperature changes (winter and summer temperatures), and various other gutter issues.


By instinct, we believe that if a product has a strong odor, then it is dangerous. Well, this is not really true. However, if you are concerned about the odor and the chemicals, then you better get a mask for extra peace of mind. Note that if there is an odor when you apply the sealant, then this odor shall not last much longer than the drying time.

#1. Rust-Oleum 275116 Stop Rust Leak Seal – Top picks

Rust-Oleum 275116 Stop Rust Leak Best Gutter Sealant

The Rust-Oleum Stop Rust Leak Seal is the best gutter sealant because it prevents water and moisture from penetrating into your gutters. It is also easy to apply and has a powerful general sealant around the house.

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What is the best gutter sealant?

Below are 5 of the best gutter sealant you can find on the market:

#1. Rust-Oleum 275116 Stop Rust Leak Seal

If you want a very effective way to seal your gutters, the Rust-Oleum Leak Seal is the best gutter sealant. It is a rubber coating that is relatively cheap and does a good job in sealing any gutter leak. This product seals leaks and cracks in your gutter effectively with a water-tight and paintable finish.

You can use it on windows, roofs, gutter, pipes, basement nad pretty much anything around the house. This high build oil-based formula dries to touch in 1 hour and covers up to 40 sq ft. Finally, it has a very flat finish which means it can be top-coated with latex or other oil-based paints.

The Rust-Oleum has also been known to be used as a best eavestrough sealant. If you have small holes in your eavestrough, then you can use this sealant.

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#2. Geocel Corp. 29402 Instant Gutter Seal

The Geocel Corp Instant Gutter Seal is great for quick and effective sealing on small gutter leaks and narrow gutter seams. This gutter sealant is great at spot sealing and cures fast. In terms of materials, it is made of a terpolymer single-component sealant. It is also basically self-leveling and elastomeric, as well as blocking air and moisture through small openings.

We really like the fact that it adheres easily to most gutter surfaces, whether they are damp or oily. Also, it offers great UV resistance, easily cleans up, and you can paint over it. Overall, this gutter sealant is both durable and flexible. Also, in terms of area and coverage, it covers about 12 square feet per 5 ounces tube.

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#3. Dap 18188 Gray Gutter and Flashing Sealant

best sealant for gutter leaks

The DAP Gutter Sealant is a butyl rubber formula that provides a very durable and flexible sealant for your gutters. It is also watertight. This butyl rubber sealant is definitely thicker and way more sticky than most of the competitor chaulks, so be sure to wear gloves.

We really like the efficacy of this best gutter caulk as it works well on gutters of all types.

The only letdown is the long dry time, which is about a day.

Additionally, this gutter sealant is good for both indoor and outdoor use. It has a minimum to a maximum operating temperature of minus 40 to 180 F.

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#4. Liquid Rubber Waterproof Sealant – This sealant is best for areas exposed to sunlight

best caulking for eavestrough

The selling point of the Liquid Rubber Sealant is that it is water-based, so it has no solvents or VOCs. This means it’s safe to use both indoors and outdoors. This product is safe to use around your kids and pets. It is also quite protective of the environment.

We really like how easy it is to apply. There is nothing to mix as you just open the container and start brushing it on like paint.

Also, this product is highly flexible and will not degrade in the sun. In terms of coverage, you get about 50 square feet per gallon per coat. To get a 6 to 80 mil membrane, you need about 3 to 4 coats. 2 to 3 coats will get you a 40 to 60 mil membrane. It is also the best sealant for eavestrough, though not many use it for that.

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#5. Flex Seal Liquid Rubber in a Can

Flex Seal Liquid Rubber in a Can - best gutter sealant

We like the Flex Seal Liquid Rubber in a Can as the best gutter sealant because it is cheap, non-toxic, and very easy to use. We like how this liquid rubber can be used to seal almost anything. You are not just limited to sealing gutters but practically anything around the house.

This stuff lasts for years and cures quite easily. It stays flexible and pliable, will not crack or peel in the winter or drip in the summer heat. You can also apply it on wet or dry surfaces. Finally, this gutter sealant is cheap enough so that you can apply it in layers without worrying about spending too much money.

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Frequently asked questions about repairing gutter leak

Here are the answers to the most frequent questions asked about gutter sealants.

How long does gutter sealant take to dry?

This really depends on the type and make of the sealant. As a rule of thumb, you’ll find that gutter sealant will take around 36 hours to fully dry.

How do you remove old gutter sealants?

You need a number of things to do this.

  • Get your tools:
    • A sharp utility knife to cut out old caulk
    • Heat gun to remove any stubborn caulk
    • Putty knife
    • Any type of Silicone Caulk Remover
    • Mineral spirits or some lacquer thinner (this is to be used for latex and polyurethane caulks type)
  • First, apply the caulk remover. You can also apply mineral spirits or lacquer thinner
    • Ensure that you don’t spread the remover all over the place. Try to keep it to the sealant bond line. Now, wait as it will take some time for the remover to work. Instructions should be on the package for wait time.
  • After the waiting time, use the utility knife and start removing the sealant slowly. Be gentle so as to not injure yourselves.
  • When you are done, you can apply the new sealant or one of the above best caulk for gutters.

Gutter sealant vs silicone – Which one is best to avoid leaks?

Gutter sealant and silicone are both popular materials used in gutter systems.

While they both serve the same purpose of protecting your home from water damage, they have some key differences that should be considered before making a decision.

Gutter sealant is generally more cost-effective and easier to apply than silicone, but it does not offer as much resistance against weathering or temperature changes.

On the other hand, silicone does provide better protection against these elements and will last longer than gutter sealant, but it is more expensive and difficult to apply.

Ultimately, when choosing between gutter sealant and silicone for your gutter system, it comes down to personal preference and budget.

If you are looking for an affordable solution with good protection against the elements, then gutter sealant is likely your best option. But if you’re willing to pay a bit extra for added protection against weathering and temperature changes, then silicone might be the right choice.

Can I buy the best gutter sealant spray?

Yes, you can buy the best gutter sealant spray available on the market.

This type of product is designed to help protect your gutters from water damage and make sure that they last longer.

It is important to choose a quality product that has been tested and proven to provide the best protection for your gutters. When shopping around, look for products that contain high-grade materials, such as silicone or rubber, which will help create a strong and durable seal against water.

Additionally, read customer reviews online to get an idea of how well each product works in different environments and climates. With a bit of research, you should be able to find the perfect gutter sealant spray for your needs.

Does aluminum gutter sealant exist?

Yes, they do exist.

For aluminum, it is a little bit more complicated to find the right sealant. But we got you covered. You can use a common glue found in the Loctite Stik’n Seal Outdoor. It is a really good, high-performance, and fairly versatile sealant. Everyone can use it easily, and it works wonders on small holes in aluminum gutters. As soon as it dries out, it will provide a perfect waterproof and weatherproof bond, and you’ll have no more leaks.

You can also opt for the GE Aluminum & Metal Silicone II. It is really good and if you have grey aluminum gutters, then the silicon is already grey-colored.

Does clear gutter sealant exist?

Yes, I am sure you’d be pleased to learn that clear gutter sealant exists. In fact, they are a great way to maintain your gutters in tip-top condition.

This type of sealant is used to fill in cracks and holes, repairing any damage that’s been done over time. It also helps to keep out pests, debris, and water from accumulating in the gutters.

Note that a clear sealant allows light to pass through it, so your gutters will still look attractive even with the sealant applied. Also note that these are perfect for gutter repair, but can also be used to repair other areas in your home that need a watertight seal.


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