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12 Best Caulk For Gutters In 2024

Sonya Harris
  May 20, 2024 8:27 AM

We independently study, test, and review 12 Best Caulk For Gutters products before making recommendations. We’re testing the Gorilla, GE, DAP, Geocel, Amerimax, InstaTrim, Waterproof, Momentive Performance Materials Inc  for a for a future update to this guide.


Gutter repairs are necessary since there is a leak there. Make sure you acquire the correct caulk for the task before you grab the first brand you see. Otherwise, you'll be back to square one in a few of weeks.

It's important to know that not every gutter sealant is the same. Metal-specific adhesives, on the other hand, can be used on plastic. In addition to that, there is a subset that may be used on metal, plastic, and a variety of other substrates as well. Caulk nation's super heroes have arrived.

A variety of sealants, including those recommended by pros and do-it-yourself experts, were put to the test to determine our top recommendations for the finest gutter caulk.

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Last update on 2024-05-20 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Buying Guide

Drying Time

Gutter sealant that takes an eternity to dry is obviously not what you want. All of the products on our list have been proved to dry fast and efficiently enough to mend minor fractures or leaks in a matter of minutes.

Gutter sealant drying time is not the only factor to consider. You also need to think about how the sealant will look when it dries. A semi-smooth to smooth finish is ideal, rather than a flaky or crusty one. Consequently, I advise you to stay away from low-cost or knock-off brands because they will not provide the same level of quality.


Because you won't be utilizing the entire can, even though this buying guidance is geared on gutter sealants, you should keep in mind the other possible uses as well.

Make sure to look at the product's other functions before making a decision. Gutters are just one example of the many uses for gutter sealant; it may also be used as a sealant for other things like PVC pipes, concrete, masonry, and roofing; for example.

Sealing Properties

As a matter of course, a gutter sealant must have excellent sealing capabilities. Is it possible to tell whether or not a gutter sealer is capable of securing all of your gutters' holes and gaps? This is the purpose of this article, isn't it? In addition to reading our reviews, you can test out a particular brand to see if it seals well.

When it comes to gutter sealant, how can you know if it's doing its job? Check to determine if the leaks have been repaired. In addition, you should check to see that the finish is not sagging or dripping. By adhering to this method, you can ensure that the gutter sealant lasts a long time and doesn't need to be redone.

Hybrid vs. Solvent-based caulk

No matter what type of gutter you have, any product that is meant to be used on it must be waterproof. It should be able to endure the ice and debris that come with frigid temperatures as well. "tear-resistant," "abrasion-resistant," and "flexible/elastic" are some of the phrases to look for on the box.

Several of the sealants available now perform an admirable job on metal gutters. These don't always stick to the surface.

Hybrid caulk is typically used on metal surfaces such as aluminum since it is a combination of silicone, polyurethane, and butyl flex caulks.. Both solvent-based and water-based seam sealers can be used. Check the label on the container to see if a particular solvent is safe to use on the surface you're planning to clean.

Ease of application

A broken caulk gun is not uncommon when trying to force sealant through the narrow opening of a tube's nozzle. Get a thinner, lighter caulk or a better caulking gun to fix the problem. We recommend using the latter for gutter caulking. This is the case, as follows.

In general, polyurethane sealants are much more durable than other types of caulk. As a result, gutters, roofs, and other high-wear areas benefit from their use. As a result, the "get a better gun" advise is warranted because of their thicker consistency.

It's a tiny price to pay for their long-lasting properties, but their gooey texture resembling old caulk or old sealant is acceptable.

Weather resistance

When using caulks meant for outdoor use, they should be resistant to cracking, sagging or buckled by extreme weather conditions. The temperature range is -200F to 1200F. As a result, the caulk can expand and contract with the substrate material without losing its integrity.

Corrosion-resistant and sun/ozone-resistant materials are also good choices. Silicone sealant should be avoided at all costs.


What kind of caulk should I use for gutters?

The material of your gutter plays a role. For the most part, hybrid caulks can only be applied to metal roofs or gutters. Both metal and plastic can be caulked with solvent-based caulks. Be sure you use a weatherproof and completely waterproof substance.

Outdoors, polyurethane caulk offers the finest results. DAP Polyurethane Caulk and Loctite PL S30 are excellent solutions. Avoid using acrylic latex in any capacity, no matter how tempting it may be.

What caulk do professionals use?

Most experts use acrylic latex caulk to seal their gutters indoors. Use a putty knife to apply, and soap and water to clean up any messes you make.

There are a few things to keep in mind when it comes to caulking metal gutters in the rain. DAP Version 3.0 Caulk is a good alternative for sealing a gutter or roof that has been leaking water. Sealants made of silicone are not as durable.

What is the best gutter sealant?

Using Adiseal gutter sealant is the best way to protect your gutters. It's quick to seal, waterproof, UV resistant, and keeps flexible even when wet. Even when it's raining, the waterproof sealant will keep leaks from forming.

On a gutter joint, which is the best sealant to use?

Adiseal sealant is the best sealant for gutter joints, whether they are being repaired, fixed, or installed.

How long does gutter sealant last?

The gutters can be sealed for up to two to four years with a good silicone-based sealer. Sealers, on the other hand, peel and split off easily in high temperatures and are removed much more quickly than typical.

Does Flex Seal really work on gutters?

Flex seal sprays do a great job of repairing gutter leaks and are incredibly long-lasting as well. It is difficult to remove in inclement weather.


There is no doubt that the products on our list are the best on the market. As a result of its high quality and excellent sealing capacity, one product has captured my eye...

Rust-Oleum Rubber Sealant is our top pick for this guide, and it's perfect for a variety of applications. Gutter, roof, ceiling, and downspout sealing can all be accomplished with a single can of this compound. Other than that, it can fill in any gap or hole in practically any form of material, including masonry, metal, and concrete, as well as a variety of other materials.

The Flex Seal gutter sealant, on the other hand, is the finest value on this list if you're searching for something. Why? Flexible, watertight, and quick-drying sealant comes in a 14-oz bottle for the price and quality. In contrast to the other products on this list, you get 14 ounces instead of 10 at this low price!

Our top 5 gutter sealants have been listed here, along with their ratings and reviews. Instead of caulking your cracks and leaks, consider using a sealant. With the application, you may save money and time.

Let us know what you think in the comments section below if this post helped you make a decision. Remember to forward this along to your friends so they can make the correct choice as well! Our guide to the finest gutter sealants has been a great resource for you!

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