The Best Sealant for Metal to Concrete

Last Updated on June 18, 2023

When joining metal and concrete components, the right type of sealant is essential to ensure a secure and lasting bond. The choice of sealant can be tricky, however, as certain materials require stronger adhesion than others. 

In order to make the best decision for your application, it’s important to consider factors such as strength and durability, adhesion properties, chemical resistance, temperature range and flexibility, and weather resistance. 

From epoxies to polyurethanes to acrylics, there are many popular types of sealants available on the market today that can provide reliable protection against water ingress and temperature fluctuations in metal-to-concrete applications. 

Here we will discuss each of these factors in more detail so that you can make an informed decision about which type of sealant is right for your project.

Need a Quick Decision? Here’s Our Top Picks:

1. Permatex 81158 Black Silicone Adhesive Sealant

Looking for a reliable, all-purpose sealant? Look no further than Permatex 81158 Black Silicone Adhesive Sealant. This versatile bonding agent is safe to use in any indoor or outdoor environments and is temperature resistant from -75°F to 450°F (-59°C to 232°C). 

Here’s an in-depth look at everything this convenient adhesive has to offer:

1. Sensor-Safe General Purpose Bonding – Permatex 81158 is formulated with safety in mind and can be used on a variety of surfaces, including glass, metal, plastics, fabrics, vinyls and weather stripping. No need to worry about surfaces wearing down when using the black silicone sealant.

2. Seals, Bonds, Repairs & Mends – Whether you need to mend wood joints, seal windows against the elements or fix broken appliances, this multi-purpose product does it all! Permatex 81158 bonds quickly and securely so that your repair job holds up long term.

3. Waterproof & Flexible – Worried about water damage? Not with this temperature resistant adhesive! Plus, its flexibility allows it to resist vibration and wear away over time. For extra security, clamp up mended surfaces for one hour after applying the product. 

And there you have it, a reliable and powerful silicone sealant designed for any indoor or outdoor repair project! From waterproofing to patching up holes in woodwork, Permatex 81158 Black Silicone Adhesive Sealant is the perfect choice for all your sealing needs.

Highlighted Features:

  • Sensor-safe for use on many surfaces
  • Bonds and seals to a variety of surfaces
  • Resists vibration and wear over time
  • Temperature resistant
  • Indoor or outdoor use

2. Liquid Rubber Waterproof Sealant

Looking for a reliable waterproof sealant? Look no further than Liquid Rubber Waterproof Sealant! Environmentally friendly, highly flexible, and durable, this versatile sealant is perfect for any job. Here’s an in-depth look at everything Liquid Rubber has to offer:

1. Protective Finish For – This sealant is designed to work with a variety of surfaces – flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood and concrete. It’s the perfect solution for any sealing project you have!

2. Highly Flexible & Durable – Once cured the final membrane has over 1000% elongation preventing adhesion failure and is UV Stable so it won’t degrade in the sun. Plus it won’t shrink or crack over time.

3. Coverage – Depending on the surface you are covering and the desired thickness of your membrane achieved by multiple coats of sealant applied with a brush or roller liquid rubber provides great coverage.

4. Environmentally Friendly – Liquid Rubber can be used indoors and out without special breathing apparatus as it contains no solvents or VOCs (Volatile Organic Compounds). And because it’s water based it’s safe for humans and pets alike!

5. For A Bulletproof System – To ensure that your waterproof system lasts bridge joints, seams and vents with Liquid Rubber Seam Tape or Geo Textile products which allow movement while still maintaining your protective layer.

And there you have it an eco-friendly waterproofing solution that can be used on a range of different surfaces! With its durability and flexibility coupled with its ease of use, Liquid Rubber Waterproof Sealant provides all you need to create a reliable bulletproof system every time so that whatever project you have gets done right the first time around.

Highlighted Features:

  • Keeps your surface waterproof and protected against the elements
  • Highly durable and flexible – perfect for a variety of surfaces
  • Easy to use, provides all you need in one sealant
  • Environmentally friendly and safe for humans and pets alike

3. Red Devil 0826 100% Silicone Sealant Architectural Grade

Need a sealant that’s tough and built to last? Red Devil 0826 100% Silicone Sealant Architectural Grade is the perfect choice. This product features powerful, flexible silicone rubber designed to withstand even the most extreme conditions. Here’s an in-depth look at what Red Devil has to offer:

1. Tough 100% Silicone Rubber – Red Devil’s sealant combines unrivaled strength with flexibility, making it ideal for all sorts of applications indoors and out. Plus, its long-lasting sealing abilities ensure that any job completed with this sealant will stay secure for years.

2. Resists Water – Rest assured that no matter what environment you’re sealing in, this sealant will keep water out! It won’t crack, shrink or peel over time either—it’s made to last up to 50 years with a limited warranty included.

3. Architectural Grade – This isn’t just your average silicone sealant; Red Devil comes equipped with architectural grade material designed to hold up against the elements in any climate—even temperatures below freezing!

And there you have it—a powerful and reliable silicone sealant that can handle whatever job you throw at it! Whether you need to waterproof a roof or weatherproof some windows, Red Devil 0826 100% Silicone Sealant Architectural Grade has got you covered for years to come.

Highlighted Features:

  • 100% silicone for toughness and durability
  • Resists water in any environment– indoor or outdoor
  • 50-year limited warranty
  • Red Devil 0826 is an architectural grade silicone sealant
  • Suitable for use in any climate, even below freezing!
  • Holds up against the elements better than other brands

4. 3M Marine Grade Silicone Sealant

Wishing you could keep your boat or watercraft looking good for years without worrying about sealant on deck? Then 3M Marine Grade Silicone Sealant is the perfect choice. This powerful sealant offers a wide range of advantages, making it ideal for a variety of uses above the waterline. Here’s a closer look at what 3M has to offer:

1. Developed Specifically as a Marine Sealant – Crafted specifically with marine applications in mind, this powerful sealant stays tough and flexible no matter the conditions. Whether you’re in warm climates or cold, this sealant will stay secure and provide an effective seal that won’t let you down!

2. Very Versatile – Ready to tackle any job from metal to glass, paint to fiberglass and more, this all-in-one solution is easy to apply right from the container with no mixing required. It also won’t turn yellow over time keeping your watercraft looking sharp and new!

3. Easy To Use – In addition to its versatility, 3M Marine Grade Silicone Sealant is incredibly easy to use because it requires no mixing and cures in as little as 24 hours so you can get back out on the water faster!

And there you have it—a marine grade silicone sealant designed specifically for boats, ships, and other kinds of watercrafts. With its quick cure time, ease of use and non-yellowing properties 3M Marine Grade Silicone Sealant ensures that whatever job you need sealed will stay tight and secure for years ahead!

Highlighted Features:

  • Marine grade sealant that’s tough and flexible
  • Versatile – works on many surfaces
  • Easy to use, apply right from the container
  • Keeps watercraft looking sharp – won’t turn yellow over time
  • Cures in as little as 24 hours

5. GE Advanced Silicone Window & Door Sealant

Looking for a reliable sealant that won’t break down in harsh weather and can provide a lasting seal? GE Advanced Silicone Window & Door Sealant is just what you need.

Offering 100% waterproof protection, 10-year mold-free product protection, and 40% more flexibility than Class 25 sealants, this sealant offers superior adhesion and durability—whatever the elements have in store. Here’s an in-depth look at what it has to offer:

1. 100% Waterproof and Weatherproof – With its advanced 100% silicone formula, GE Advanced Silicone Window & Door Sealant offers unbeatable protection against water damage. This durable formula provides a reliable seal even in areas prone to extreme temperatures and weather conditions.

2. 10-Year Mold-Free Product Protection – Cured with this powerful sealant, your windows and doors will be protected from staining caused by mold and mildew growth for up to ten years!

3. Permanently Flexible with Strong Adhesion – This sealant is incredibly flexible and strong, offering 40% more flexibility than Class 25 sealants while also providing 7x stronger adhesion than Silicone 1’s standard outcome. Plus, it won’t shrink or crack due to fluctuating temperatures either!

4. Compatible with Most Materials– Last but not least, GE’s advanced silicone window & door sealant is compatible with most common building materials such as aluminum, composites, brick, stone stucco masonry cement board glass drywall ceramic porcelain tile wood metal rubber vinyl plastic laminates PVC and more!

And there you have it—a secure, reliable solution for all of your sealing needs! With its strong adhesion capabilities, permanent flexibility and waterproof protection, GE Advanced Silicone Window & Door Sealant ensures all of your projects stay sealed for years to come!

Highlighted Features:

  • 100% waterproof and weatherproof
  • 10-year mold-free product protection
  • Permanent flexibility with strong adhesion
  • Durable – rain-ready in as little as 30 minutes, resistant to shrinking and cracking due to temperature fluctuations
  • Compatible with most materials

6. Sikaflex Construction Sealant

If you’re looking for a reliable sealant that can stand up to the toughest of jobs, then look no further than Sikaflex Construction Sealant. Developed as an all-purpose polyurethane, Sikaflex offers superior performance and durability when it comes to sealing tight gaps and joints.

Plus, it’s paintable meaning it can be used in a variety of jobs from interior wall sealing to balconies around window frames and more! Here’s what else it offers:

1. Performance – Thanks to its ±35% joint movement, this sealant is capable of high-performance even when exposed to fluctuating temperatures. Additionally, because the cured formula is waterbase, oil-based and rubber-based paints are all compatible when painting over the sealed area.

2. Durability – The cured Sikaflex sealant maintains a tough yet flexible consistency with exceptional cut and tear resistance. Plus, its resistance against aging and weathering ensures your job stays sealed for longer periods of time!

3. Supports – Bonding to most construction materials without a primer Sikaflex effortlessly waterproofs joints between brickwork, blockwork masonry wood and concrete or metal frames making it ideal for a wide range of applications.

4. Uses – Whether you’re looking to fill gaps in walls or floorboards, expand existing expansion joints or fit windows and doors into your home—Sikaflex has you covered! This powerful sealant makes sure that whatever job you need completed will stay sealed for years ahead! 

No matter what type of job you need done—big or small—Sikaflex Construction Sealant is here to save the day! Its superior performance capabilities coupled with its durable formula make it perfect for even the toughest jobs while also providing easy paintability which ensures your application looks great too!

Highlighted Features:

  • Sikaflex is perfect for a wide range of construction applications
  • Sikaflex is tough, flexible, and long lasting
  • Easily bonds to most construction materials
  • Weather Proofs joints between brickwork, blockwork, masonry, wood, and concrete or metal frames
  • Seals gaps in walls, floorboards, expansion joints, and more!

Buying Guide on Choosing the Appropriate Sealant:

When selecting the best sealant for your specific needs, it is important to consider factors such as temperature range, chemical resistance, adhesion strength, flexibility, UV resistance, and more. Below is a comprehensive guide on what to look for in the best sealant for metal to concrete applications:

Temperature Range

One of the most important considerations when selecting a sealant for metal to concrete applications is its temperature range. This will determine how well the sealant can withstand extreme temperatures and whether it will hold up over time.

For example, if the sealant will be used in an area with higher temperatures or in direct sunlight then you should ensure that it has been tested and rated accordingly. You should also confirm that the temperature range of the sealant matches that of your application’s environment.

Chemical Resistance

Along with considering a sealant’s temperature range, you should also factor in its chemical resistance. This refers to how well it resists deterioration due to exposure to chemicals or other substances present in its environment (e.g., automotive fluids).

It is important that you select a product which can resist these substances and offer long-term protection against them without degrading over time. Ideally, you should look for products which are rated according to their ability to resist common chemicals found in automotive compounds such as oil and gas vapors.

Adhesion Strength

Another key attribute of any good sealant is its adhesion strength or how well it bonds between two surfaces (in this case metal and concrete).

The best products available come with high-strength adhesives that remain bonded even under extreme temperatures or vibrations caused by machinery or traffic on roads or bridges. You can usually find adhesive strength ratings listed on product specifications so make sure you check them before making your decision!


As mentioned earlier, one of the main benefits of using a sealant between metal and concrete is being able to accommodate any potential movements without compromising bonding strength – this is where flexibility comes into play.

Depending on your application’s requirements (e.g., bridges), some products may have higher degrees of flexibility than others which makes them better suited for certain projects. Therefore, take into account how much movement you expect from your application when selecting a suitable product!

UV Resistance

If your application requires outdoor use then UV resistance should be taken into account as well. Exposure to UV light can cause deterioration over time so make sure you select a product which offers adequate protection against these rays while still providing reliable sealing performance too!

Other Considerations

Other factors such as compatibility with different materials (e.g., wood) may also need considering depending on your project requirements so keep this in mind too when shopping around! Additionally, always ensure that you check out product reviews beforehand so you can get an idea of what people think about each option before making your decision!

Finding the right sealant for metal-to-concrete applications requires careful consideration of all relevant factors including temperature range, chemical resistance adhesion strength, flexibility and UV resistance amongst many others – no single solution fits all scenarios.

Do take some extra time researching each option thoroughly before making an informed choice as this could save you from costly mistakes down the line.

Can concrete sealer be used on metal?

Yes, concrete sealers can be used on metal. This is because the sealer helps to prevent moisture from entering through the cracks and crevices between the two materials. It also helps to protect against corrosion, staining and other forms of damage caused by exposure to water or chemicals.

Additionally, it can provide a barrier between metals and concrete, helping to extend the life of both materials. Concrete sealers are typically applied with a brush or roller, but they can also be sprayed on with a pressure washer.

Does epoxy stick metal to concrete?

Yes, epoxy is an effective adhesive for bonding metal to concrete. As an adhesive, epoxy creates a strong chemical bond that holds fast against loads created by vibration and dynamic movement between the two surfaces. Epoxy adhesives are often used in construction projects due to their superior strength and versatility compared to other glues and adhesives.

Epoxy is particularly useful for bonding metals in harsh environments such as outdoors or in areas with extreme temperatures since it can withstand high temperatures without deteriorating or becoming brittle like some other glues would do when exposed to heat. Additionally, epoxy does not shrink after application which means it will maintain its bond even over time.

How does temperature affect the performance of a sealant used in metal to concrete connections? 

Temperature plays an important role in how effectively a sealant performs when connecting metal to concrete surfaces.

If temperatures become too hot (above 90°F/32°C) or too cold (below 32°F/0°C) then the effectiveness of many sealants will be greatly reduced due their compositional makeup being affected by fluctuating temperatures which can cause them to expand and contract at different rates leading them become less effective as a cohesive barrier between surfaces of different materials over time.

Similarly, during periods of extreme weather conditions such as during extremely hot summers or cold winters, many sealants may need additional maintenance and treatment due their ability to break down faster than normal when exposed to constantly fluctuating temperatures for extended periods of time. 

What are the key characteristics of an effective sealant for metal to concrete applications? 

When selecting an effective sealant for use in metal-to-concrete applications there are several key characteristics that should be considered ahead of time in order properly assess its suitability for your specific project needs: 

• Durability– Selecting a durable product that is specifically designed for metal-to-concrete connections where temperature fluctuations will occur is critical since these types of products are designed more robustly than normal products since they have specialized ingredients that allow them withstand more extreme environmental conditions which can otherwise lead them breaking down prematurely;  

• Flexibility– Selecting a product that offers good flexibility alongside strength is essential since this will help ensure that the joint remains flexible enough so as not create any cracks due constant movement between components; 

Adhesion– Look for products that offer high levels adhesion since these types products help ensure maximum security between components; 

Waterproofing & Protection– Make sure you select waterproofing & protection features within your selected product if required as certain environments may require additional waterproofing properties as well as protection from sunlight UV rays; 

Ease Of Application– Consider selecting products that offer easy application processes such as sprayable products which require minimal preparation & drying times allowing you begin work quickly without having deal with unnecessary mess afterwards;  

Compatibility – Make sure you check compatibility before applying any product since some products may only adhere certain types metals whereas others may be suitable across various materials including steel, aluminum & copper alloys amongst others; 

Compatibility With Surroundings – Certain projects may require added levels compatibility such as tonal differences between surrounding paintwork & finishes whereby selecting appropriate products will ensure complete consistency throughout entire project scope regardless what type material being used underneath surface layer;  

Warranty – Check warranty details associated with each product considering factors such length shelf-life alongside reimbursement options case where expectations haven’t been met etc


Choosing the right type of sealant for metal-to-concrete applications requires paying close attention to factors such as strength and durability, adhesion properties, chemical resistance, temperature range and flexibility, and weather resistance.

Once these factors have been considered carefully, there are a variety of popular types of sealants to choose from such as epoxies, polyurethanes and acrylics that can effectively protect against moisture penetration or extreme temperatures.

By taking the time to research all available options thoroughly before making a selection you can ensure that your metal-to-concrete connection will remain secure for years to come.

About the author

Leave a Comment