5 Best Sealants for Metal Roof
5 Best Sealants for Metal Roof
5 (100%) 1 vote[s]
Loctite PL S30 Black Roof
Brand Name Loctite
Color Black
Container Size 10 ounces
GE Sealants & Adhesives
Item Weight 14.4 ounces
Color Metallic Gray
Size 10.1oz
General Electric GE285
Manufacturer General Electric
Color Metallic Gray
Material Plastic
Titebond Adhesive-Caulk
Item Weight 12.8 ounces
Color Translucent
Item Weight 12.8 ounces
Novagard NovaFlex Metal
Material Vinyl
Color Mr4103 Silver Metallic
Brand Novagard

Choose the Best Sealants for Metal Roof

Customer’s Choice: the Best Rated Sealants for Metal Roof

1 users answered this survey. Please help us improve this review!

0% of users selected Loctite PL S30 Black Roof, 100% selected GE Sealants & Adhesives, 0% selected General Electric GE285, 0% selected Titebond Adhesive-Caulk and 0% selected Novagard NovaFlex Metal. Every month we analyze your answers and change our rating.

A metal roof is a great investment for your home. Not only does it look good, but it can also provide superior protection from the elements. One of the most important aspects of maintaining a metal roof is ensuring that it is properly sealed. If you’re looking for the best sealants for metal roof, you’ve come to the right place! In this comprehensive guide, we will discuss everything you need to know about sealing your metal roof. We’ll talk about the different types of sealants available and how to choose the right one for your needs. We’ll also review some of the best products on the market and offer helpful tips on how to use them. So read on to learn more about sealing your metal roof and find the perfect sealant for your home. Thanks for reading!

Loctite PL S30 Black Roof and Flashing Sealant

If you’re looking for a roof and flashing sealant that’s easy to use, easy to remove, and has a great chocolate smell, Loctite PL S30 is the perfect choice. It holds well and is easy to control the flow, making it ideal for sealing around roof flashing and other difficult-to-reach areas.

Plus, it’s easy to remove even after it dries, so you can rest assured that your repair will last.
If you’re looking for a sealant that’s difficult to use after opening the tube once, Loctite PL S30 is the perfect choice! This product is thick and messy, and the packaging is cheap – you’ll definitely need to be prepared before using it. But despite all its drawbacks, Loctite PL S30 does the job it’s supposed to do. So if you’re not too fussy about quality and just want something that will do the job, go ahead and give this sealant a try.

  • Has a nice chocolate smell;
  • Holds great;
  • Easy to remove even after drying;
  • Easy to control flow;

  • Messy;
  • Too thick;
  • Cheap packaging;
  • Hard to use after opening it once;

GE GE5050 Silicone II Aluminum and Metal Sealant

Looking for a metal sealant that’ll stay put? Look no further than GE GE5050 Silicone II Aluminum and Metal Sealant! This awesome product is perfect for most aluminum and stainless steel roofs, and it’s resistant to sun and freezing – so you know it will resist even the harshest of elements.

Looking for a sealant that can handle metal and aluminum? GE GE5050 Silicone II is the perfect choice! This powerful sealant sets quickly and forms a watertight, airtight seal. Plus, it’s resistant to weathering and UV rays, making it perfect for outdoor use. Just be careful, the description is misleading – it’s not designed for wood or plastic, so make sure you know this before you start sealing! And be warned – this sealant can be pretty messy, so make sure to wear gloves and clothes that you don’t mind getting dirty.

  • Perfect for most aluminum and stainless steel roofs;
  • Metallic color matches the color of your metal;
  • Resistant to sun and freezing;

  • Not designed for wood and plastic;
  • Hard to clean afterwards;
  • Very messy;

General Electric GE285 Aluminum and Metal Silicone II Caulk

Looking for a great metal caulk to match your metal roof? Look no further than the General Electric GE285 Aluminum and Metal Silicone II Caulk! This top-of-the-line caulk is perfect for any metal roof, and comes in a variety of colors to perfectly blend with your existing roof. Not only does it look great, but it also protects against mold and sticks well.

Plus, it’s easy to use thanks to the handy tube design, and dries quickly so you can get back to enjoying your new roof in no time!
Looking to seal up your home but don’t know which caulk to use? Look no further than General Electric GE285 Aluminum and Metal Silicone II Caulk! This product is perfect for a variety of applications, but be sure to mix it thoroughly before using. Keep in mind that it’s not resistant to hot weather, so be careful when applying it in summer months as it will become too runny to apply. And lastly, remember that this caulk doesn’t stick to wet surfaces, so be mindful of the conditions before you start sealing!

  • Great metal color blends with any metal roof;
  • Protects against mold;
  • Sticks well;
  • Easy to use tube;
  • Dries quickly;

  • Requires mixing prior to use;
  • Too runny;
  • Not resistant to hot weather;
  • Doesn’t adhere to wet surfaces;

Titebond 61111 Adhesive-Caulk

Looking for the perfect adhesive-caulk for your next project? Titebond has you covered with their 61111 product. This top-of-the-line adhesive caulks comes in a 10.1 ounce volume, making it perfect for filling gaps without being too runny. It also cures well, so you can be sure your bond will last.

And applying it is a breeze – just smooth it into place and you’re good to go!
Don’t be fooled by the name – this adhesive-caulk is not different from the silicone sealant at all, so it might not be the best choice for your metal roof. Bubbles can form after curing, which means it’s not as water-proof as it claims to be. In fact, it might even let flakes of dried paint and other debris inside your home.

  • Volume of 10.1 Ounces;
  • Perfect for filling gaps due to low viscosity;
  • Cures well;
  • Easy to apply;

  • Bubbles can form after curing;
  • Not that different from silicone;
  • Doesn’t keep out water flakes up;

Novagard 02-MR4103-10C1 NovaFlex Metal Roof Sealant

Looking for a reliable sealant that can stick to almost any construction material? Look no further than Novagard 02-MR4103-10C1 NovaFlex Metal Roof Sealant! This top-of-the-line sealant can withstand extreme temperatures (-40ºF to +400ºF), and cures in just 2 days.

So whether you’re sealing a metal roof or masonry wall, this is the perfect product for the job that will last for a long while.
Novagard 02-MR4103-10C1 is unfortunately not compatible with frosty or wet surfaces, and the installation temperature must be not below 0 degrees Fahrenheit or more than +120ºF to make it work optimally.

  • Sticks to metals, wood, masonry and many other construction materials;
  • Service temperature from -40ºF to +400ºF;
  • Cures in up to 2 days;

  • Doesn’t adhere well to frost-laden or wet surfaces;
  • Not compatible with some materials;
  • Installation temperature must be not below 0ºF or more than 120ºF;

Buyer’s Guide for the Best Sealants for Metal Roof

When it comes to choosing a sealant for your metal roof, there are a few things you need to keep in mind. We will review each of the factors one by one.

What Are the Roof Sealants?

A roof sealant is a special type of coating that is applied to the roof in order to protect it from the elements. Roof sealants are available in a variety of different colors, but they all serve the same purpose: to keep your roof looking new and prevent it from leaking.

What Are the Roof Sealants?

In What Cases Would You Need To Use a Roof Sealant?If you have a metal roof, then it is likely that you will need to use a roof sealant at some point. Metal roofs are susceptible to rust and corrosion, so a good quality roof sealant can help to prevent these problems. In addition, if you live in an area with high winds, then a roof sealant can also help to keep your roof from being damaged by the wind and sunlight. [1],[2],[3],[4]

Types of Metal Roof Sealants You Can Find on Market

There are a few different types of roof sealants available on the market, so it is important to choose one that is right for your needs. Here are some of the most popular types of roof sealants: Acrylic Sealants, Rubber Sealants, Silicone Sealants and Polyurethane Sealants. You can also use sealant tape in some cases.

We shall discuss each of these types in detail below.

Acrylic Sealant

Acrylic sealants are the most popular type of roof sealant. Their main purpose is to deflect the UV rays of the sun, which can damage your roof over time.

The materials acrylic sealant is made of, create a very strong and durable sealant that can withstand extreme weather conditions. Acrylic sealants are also very flexible, so they can expand and contract with your metal roof as it heats up and cools down.

However, one downside of acrylic sealants is that they don’t create a water-proof barrier. This means that if your metal roof leaks, then the sealant will not be able to prevent water from getting through. [1],[2],[5]

Silicone Sealants

Silicone sealants are another popular type of roof sealant. They are made from a silicone resin that is mixed with an adhesive. This creates a strong and durable seal that can withstand extreme weather conditions.

Silicone sealants are also very flexible, which makes them ideal for sealing around corners and edges. They can also be used on a variety of different roofing materials, including metal, asphalt, concrete, and clay tiles.

Silicone Sealants

One of the main advantages of silicone sealants is that they are waterproof. This makes them an excellent choice for areas that are prone to leaks or flooding. Silicone sealants can also resist mold and mildew growth.

One downside to silicone sealants is their price. They are one of the more expensive types of roof sealants on the market. So if you are looking for a budget-friendly option, silicone sealants may not be the best choice for you. [1],[2],[5]

Rubber sealants

One type of sealant that can be used on metal roofs is a rubber sealant. This type of sealant is typically applied in a liquid form and then dries to form a rubber-like barrier. Rubber sealants are effective at sealing around joints and seams on metal roofs because of how thin they are. They are also relatively easy to apply and can be found at most hardware stores.

Another advantage of rubber sealants is that they are fairly flexible, so they can expand and contract with the metal roof as temperature changes occur. This flexibility helps to prevent cracks from forming in the sealant over time.

Disadvantages of rubber sealants include the fact that they are not UV resistant, so they will eventually degrade when exposed to sunlight. They are also not as durable as some of the other types of sealants on this list, so they may need to be reapplied more often.

Sealant tape

Sealant tape is a common product used to waterproof roofs. It is easy to apply and can be found at most hardware stores. Sealant tape is available in different widths and lengths, so you can choose the size that best fits your needs. Sealant tape is also available in different colors, so you can match it to the color of your roof.

Sealant tape is applied by peeling off the backing and pressing the tape into place. Once the sealant tape is in place, it will create a watertight seal that will prevent leaks. Sealant tape can be used on both metal and asphalt roofs. If you have an asphalt roof, you will need to use a different type of sealant tape.

Sealant tape is a great option for sealing around vents, skylights, and chimneys.
Sealant tape can also be used to repair leaks in your roof. If you have a leak in your roof, you can use sealant tape to temporarily fix the problem until you can get a permanent fix. Sealant tape is not meant to be a permanent solution, but it can help you avoid costly repairs. [1]

If you are looking for a more permanent solution, then you may want to consider using caulk. Caulk is applied like sealant tape, but it dries hard and creates a more durable seal. Caulk is available in different colors, so you can choose one that will best match your roof.

Caulks are hard when they dry. They can be used in areas where there is not much change. But they are not good for areas that need to be flexible. [1],[2],[3],[4],[5]

How to Apply a Metal Roof Sealant?

Applying a metal roof sealant is easy with the right tools and materials. You’ll need a putty knife, a clean cloth, and your chosen sealant. First, remove any dirt or debris from the area you’ll be working on. Next, locate the leak area and apply the sealant to the surface. Once it’s evenly distributed, press down on the area with medium force to help the sealant to adhere. Then, use the paint thinner and a cloth to smooth it out and remove any excess. Allow the sealant to dry completely before using the area and the work is done. [6],[7]

Where on the Roof I Should Use a Metal Sealant?

There are a few key areas where you’ll want to use a metal roof sealant. First, apply it around any openings on the roof. This includes skylights, vents, and chimneys. You’ll also want to apply it along the edges of the roof and at any seams or joints. Doing so will help create a watertight barrier that will keep your home dry and protected from the elements.

Where on the Roof I Should Use a Metal Sealant?

Sealants can also be used to repair damaged areas of the roof. If you have any cracks, holes, or gaps, simply apply a sealant to fill them in and prevent further damage. Metal roofs are built to last, but they still require some maintenance from time to time. By regularly inspecting your roof and applying a sealant when needed, you can extend its lifespan and keep your home safe and dry for years to come. [6],[7]

How Long Does a Metal Roof Sealant Last?

This is a difficult question to answer because it depends on the specific product you use, the environment in which your roof is located, and how often you perform maintenance on your roof. In general, however, most metal roof sealants will last for several years, from 10 to 20, before needing to be replaced.

If you live in an area with high humidity or frequent storms, you may need to replace your sealant more frequently. Likewise, if you don’t regularly clean and inspect your roof, the sealant may not last as long.

To get the most out of your metal roof sealant, be sure to follow the manufacturer’s instructions for application and maintenance. By doing so, you can extend the life of your sealant and keep your roof looking its best. [1],[2]

Now that we covered the basics about roof sealants and tips on how to seal your metal roof, let’s take a look at some of the best sealants on the market. Below, we’ve reviewed five of the best metal roof sealants to help you find the right one for your needs.

Type of Sealant

Sealants can be divided into two categories, water-based and solvent-based.

Water-based sealants are easier to apply and usually have a lower VOC content. However, they may not be as durable as solvent-based sealants and may require more coats to achieve the same level of protection. But they are a more budget friendly pick among the two, plus the application is easier.

Solvent-based sealants are more durable and provide better protection against weathering, but they can be more difficult to apply and because they contain some dangerous chemicals you need to wear a respirator while working with them. They also typically require mineral spirits or other solvents for cleanup, which can be less convenient and more harmful to the environment.

There are several different sealants available, each with its own set of properties and benefits. For example, there are silicone, acrylic, and urethane sealants. Each has specific benefits and drawbacks that you’ll want to think about before making a selection. [2]

Material of the Roof

The thing you definitely want to consider is the material of your roof. The type of material your roof is made from will determine which sealant you should use. For example, if it’s a steel roof and you want to protect it against leaks, then there are some special products designed just for this roof type.

Material of the Roof

If you’re not sure what type of metal your roof is made out of, it’s always best to ask a professional or take a sample of the metal to a local hardware store to find out. Reading item descriptions can help you with making your choice as well. [1]


Waterproofness is one of the most crucial factors to think about when selecting a sealant for your metal roof. After all, you want to make sure your roof is protected against the elements. When looking for a sealant that is water resistant, there are a few things to look for.

The first thing you should look at is the product’s label. Most manufacturers will list how waterproof their product is on the label. If it doesn’t say anything about waterproofing, it’s probably not very good at it.

All silicone, rubber and polyurethane are great waterproofing agents, so it’s a good idea to look for sealants that contain these ingredients.

Finally, you can always try the sealant out for yourself. Simply apply a small amount of the sealant to a piece of metal and then spray it with water. If the sealant beads up and repels the water, it’s probably a good choice for your roof.

Waterproofness is important, but it’s not the only factor you need to consider when choosing a sealant for your metal roof. The next thing we’ll look at is the climate. [1],[2]

Climate in your area

Another thing to consider is the climate in your region. If you reside in a location with extreme temperatures or high humidity, your sealant’s longevity might be shortened. In general, however, all varieties of sealants will last longer in cooler and drier climates.

When selecting a sealant, keep in mind that it must endure the elements in your location. Some sealants are intended for certain climates, so double-check the item’s characteristics before making a purchase to ensure you get what you want.

Easiness of Application

Another thing to think about when selecting a sealant is how simple it is to apply. You don’t want something that’s going to be difficult to distribute evenly, especially if you’re dealing with a larger surface area. Some sealants are available in caulking tubes with an applicator tip for easy application, while others are sold in ready-to-use bottles with an attached applicator tip.

Another thing to keep in mind is the drying time of the sealant. If you need something that will dry quickly so you can move on to the next step of your project, look for a sealant that has a short drying time.

Most sealants completely cure between 8 and 24 hours. [1],[2]

UV Reflectivity

A metal roof sealant’s ability to reflect heat and UV rays is one of its most important features. In order for you to get the most out of this feature, pick a sealant with a high UV reflectivity. This will not only help keep your home cooler in the summer, but it will also extend the life of your roof from sun damage by protecting it from sun damage.

The color of your sealant will also play a role in its UV reflectivity. White and light-colored sealants will typically reflect more heat than dark-colored sealants. [1],[2],[3]


Longevity is also an issue to consider. Nobody wants to have to replace their roof sealant every year. Metal roof sealants that are of the highest quality will last for many years without needing to be replaced.

In general, the sealant can last anywhere from five to ten years. However, it is important to read the reviews of the product you are considering to get a better idea of how long it will actually last.

The best way to prolong the life of your roof sealant is to apply it properly in the first place and to make sure that it is resistant to the weather conditions in your area. [1],[2]


The cost of a sealant is undoubtedly a consideration, but it should not be the only one. Some goods might be more expensive, but they will last longer or provide greater protection. In general, higher-quality sealants will be more costly.

You can find budget-friendly options, but make sure to read reviews before purchasing. It’s also important to compare the price per ounce or gallon, as some products may appear to be a better deal but actually require more frequent application.

C5M Certification

The rating of the sealant, provided by The International Organization for Standardization is also an important metric to look for when choosing the best sealant for your needs. C-rating is determined by a series of tests that measure a product’s ability to adhere, resist heat and cold cycles, as well as withstand UV exposure, water and corrosion.

The highest rating that a sealant can achieve is C5M. This means that the sealant has been tested and proven to be resistant against corrosion and last a long time in most climates without a hinch.

If you live in an area with extreme weather conditions, it is important to choose a sealant with a high C-rating. This will ensure that your roof is protected from the elements and will last for many years to come. [1]


Can I use silicone on a metal roof?

Yes, silicone can be used on a metal roof. Silicone sealants will provide a protection from both UV rays and water. However they are more expensive than the other types of sealants so keep that in mind.

How do you stop a metal roof from leaking?

The best way to stop a metal roof from leaking is by using sealant. This will create a barrier between the metal and the elements, preventing water or other materials from penetrating the surface.

Are metal roof sealants safe to use?

Yes, most metal roof sealants are safe to use. However, as with any product, it is always best to read the labels and follow the directions before using. If you have any concerns, consult with a professional before applying the sealant.

Useful Video: When And When Not To Use Sealant On A Metal Roof Installation


Metal roof sealants are a great way to protect your metal roof from the damages of weather and time. There are many different types of sealants on the market, so it can be tough to decide which one is right for you.

Choosing the best sealant for your needs depends on a variety of factors, including the material of your roof, climate in your area and how easy you want the application process to be. But don’t worry – we’ve got you covered. We’ve looked at five of the most popular metal roof sealants on the market and given you all the information you need to make an informed decision. Thanks for reading!


  1. https://www.bobvila.com/articles/best-roof-sealant/
  2. https://www.thisoldhouse.com/roofing/22593826/best-sealant-for-a-roof-leak
  3. https://www.residencestyle.com/choosing-the-best-roof-sealant-for-your-needs/
  4. https://www.epdmcoatings.com/blogs/2015/09/the-importance-of-roof-sealants/
  5. https://constructionreviewonline.com/installations-materials/choosing-right-roof-sealant-roof/
  6. https://www.hunker.com/12255727/what-is-the-difference-between-caulk-sealant
  7. https://www.loctite-consumer.com.au/en/how-to-guide/repair-diy-projects/roof-sealant-choose-the-best-to-keep-you-warm-and-dry.html

Hello! I'm a James Miller, and I'm an expert in materials science. I learned different metal properties in the New Jersey Institute of Technology, and I know everything about all kinds of metal. That's why I want to share my experience with you.

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