In the field of home improvement and construction, metal and concrete are often joined together. There are very small gaps between these materials that need to be filled for the project to be durable, stable, and visually appealing.
Water, air, and other elements may pass through these gaps and cause deterioration of the metal and concrete. Applying sealant is necessary to fill up these gaps and create a barrier. It also contributes to the bonding of the two materials by adhering to them.
But you need to use the best sealant for metal to concrete. The reason is that if an inferior sealant is used, it is unlikely to last very long and will require replacement soon after installation.
Good quality sealants can withstand extreme temperatures, weathering, and other conditions. The most effective way to locate a reliable sealant is to become familiar with the product and examine various products from different brands.
Permatex Black Silicone Adhesive Sealant
Highlighted Features:
👍 -75°F to 450°F temperature resistant
👍 Available in 3 oz tube
👍 Low odor
👍 Long-lasting flexible bond
👍 Waterproof and weather-resistant
GE Sealants Advanced Silicone Sealant
Highlighted Features:
👍 100% waterproof
👍 Low odor
👍 Expansion and contraction resistant
👍 UV and freezing resistant
👍 Contains 9.8 fluid ounces
Red Devil Architectural Grade 100% Silicone Sealant
Highlighted Features:
👍 Reliable and durable seal
👍 Tube contains 9.8 oz
👍 Indoor and outdoor use
👍 No cracks, shrinks, or peels
👍 Water resistant
What Type of Sealant Is Good for Use on Metal to Concrete?
Silicon-based sealants are well suited for sealing and adhering metal to concrete. Many types of sealants exist today, but not all are suitable for the application of metal to concrete. For a variety of reasons, silicon-based sealants have proved to be effective in metal construction to concrete applications.
Silicon-based sealants form a strong bond with both metal and concrete, creating a durable seal that will resist weathering and wear. In extreme climates, silicone-based sealants are highly resistant to heat and cold. The silicone-based sealants are also very flexible, allowing them to accommodate movement without cracking or breaking. This makes them ideal for use in applications where there is potential for expansion or contraction.
The combination of strength, durability, and flexibility make silicon-based sealants the most suitable choice for a variety of metal-to-concrete applications.
Best Silicone-Based Sealants for Metal-to-Concrete Applications
After you know why silicone-based sealants are good to use, you want to pick the right one. Many brands and products exist, but they’re not all the same.
Some products are better than others, and some are more suitable for specific applications. You can check out the following products, as they currently hold the top position in the silicone-based sealant category. Take a look at each product’s specifications, pros, and limitations of each product and make a decision based on your requirements.
1. Permatex Black Silicone Adhesive Sealant
Permatex silicone adhesive sealant is a versatile product suitable for sealing, bonding, repairing, and securing a wide range of materials. Metal, concrete, glass, fabric, plastics, weather stripping, and vinyl tops can all be treated with this product.
With a temperature range ranging from -75°F to 450°F, this adhesive sealant can be applied to a variety of climates and environments.
Whether you need to seal metal to concrete, this product will meet your needs. The Permatex black silicone adhesive sealant is available in a 3 oz tube. For large projects, you can purchase multiple tubes.
What May Attract You:
It is useful to have this sealant on hand because it can be used indoors and outdoors. Due to its sensor-safe characteristics, it is suitable for use around sensitive equipment.
It is also low in odor, which makes it appropriate for use in enclosed spaces. The sealant has a long-lasting flexible bond that can resist weathering, vibration, and shock.
As it is waterproof and weather-resistant, exposure to the elements will not adversely affect it.
Positive Aspects:
- Withstands temperatures from -75°F to 450°F
- Sensor safe for use around sensitive equipment
- Can be used on indoor and outdoor projects
- Low odor that won’t be overwhelming in enclosed spaces
- Resists weathering, vibration, and shock
- Waterproof and weather-resistant for long-term durability
Limitations:
- Some people have a little bit of trouble getting the sealant out of the tube
- This sealant is kind of thin, but it is effective.
2. GE Sealants Advanced Silicone Sealant
This sealant from GE Sealants has been formulated to provide high performance and long-lasting results. It can be applied in a temperature range of 32 to 120 degrees Fahrenheit and can withstand service temperatures of -60 to 400 degrees Fahrenheit.
When used on metal to concrete applications, this sealant provides a reliable bond that provides outstanding results. It is also 100% waterproof, so there is no need to worry about water penetration.
Whether it is raining or there is water present, this sealant can still provide a strong and durable seal.
It is available in a liquid form and covers an area of 51 linear feet in 9.8 fluid ounces. After 24 hours, the sealant has fully cured.
What May Attract You:
With its 100% silicone-based formulation, this sealant creates a durable, water-tight seal that is resistant to freezing and exposure to the sun.
In just 30 minutes, this formula dries, making it perfect for quick and easy indoor and outdoor applications. The sealant is designed to withstand extreme expansion and contraction due to fluctuations in temperature.
As it is resistant to freezing temperatures and UV degradation, it is the optimal sealant for metal to concrete applications. It won’t shrink and crack over time.
This advanced silicone sealant will not discolor most high-end metal finishes, such as chrome, bronze, and nickel. The formula is neutral-cure, resulting in a low odor during curing.
Positive Aspects:
- Withstands extreme expansion and contraction
- Has freezing and UV resistance
- Won’t shrink or crack over time
- Low odor during curing
Limitations:
- The silicone itself is fine, but the tube is low quality
3. Red Devil Architectural Grade 100% Silicone Sealant
Red Devil’s sealant is made of 100% silicone rubber and provides a reliable, durable seal.
You can use this clear sealant on glass, ceramic, metal, and concrete. This product is packaged in a 9.8 oz tube and is suitable for indoor and outdoor use.
What May Attract You:
This silicone sealant will provide a long-lasting seal when applied on metal to concrete. There is no cracking, shrinking, or peeling with this architectural-grade sealant.
Due to its ability to operate at temperatures below freezing, it makes it a viable option for a variety of applications. The Red Devil architectural grade 100% silicone sealant provides a strong, long-lasting bond and is easy to apply.
Positive Aspects:
- Provides a durable, reliable seal
- Indoor and outdoor use is possible
- Does not crack, shrink, or peel
- Withstands temperatures below freezing
- Easy to apply
Limitations:
- Some people may find the smell a bit strong, but not harmful
4. 3M Marine Grade Silicone Sealant
3M silicone sealant is intended to be used on a variety of surfaces, including metal, concrete, glass, fiberglass, paint, and more.
It is white in color and dries to a tough, rubbery consistency. After application, the coating dries within 20 minutes, and it is completely cured after 24 hours. It is available in a 10.3 fluid-ounce tube.
What May Attract You:
This sealant is tough and flexible, making it a good choice for use on metal surfaces in contact with concrete floors. It is formulated to resist weathering and provide long-lasting protection.
Due to its marine grade nature, it can provide a watertight seal between metal and concrete surfaces. No mixing is required to apply this sealant, so the job can be completed quickly and easily.
There will be no yellowing of the sealant over time, and it can be used on both interior and exterior applications. You may benefit from the use of 3M marine-grade silicone sealant.
Positive Aspects:
- Rubbery, tough finish
- Provides long-lasting protection
- Marine grade nature provides a watertight seal
- No mixing required
- Completely cured after 24 hours
Limitations:
- Extreme high temperatures may cause this sealant to little bit soften
5. Awoco Heat Resistant Food Grade Silicone Sealant
The Awoco silicone sealant is an easy-to-use sealant that can be applied quickly and easily to concrete or metal surfaces. With a liquid volume of 10.3 fluid ounces, the sealant can easily cover small to medium areas.
A 9-inch caulk gun can be used to apply this caulk tube. The extended tip of the tube makes it easier to reach areas that are difficult to reach. Due to its clear color, the joint sealant will not discolor the surface.
What May Attract You:
You can expect that the seal of metal to the concrete surface will last for a long time due to the heat and cold resistance of this sealant. It can withstand temperatures between -80°F and 400°F.
The sealant also meets health department requirements for use on stainless steel or metal surfaces, making it an excellent choice for a wide variety of applications.
Since this heat-resistant food grade silicone sealant is flexible and adheres well, there is less possibility of cracking or peeling. Water will not be able to penetrate its surface since it is waterproof.
Positive Aspects:
- Withstands temperatures between -80°F and 400°F
- Can be used with a 9-inch caulk gun
- Flexible that won’t crack or peel
- Waterproof for added protection against moisture
- Support 9-inch caulk gun
- Easy to apply
Limitations:
- It may feel sticky when smoothed out, but it is easy to apply
Comparison Chart of the Sealants for Metal to Concrete
| Name | Liquid Volume | Withstand High & Low Temperature | Color |
| Permatex 81158 Silicone Adhesive Sealant | 3 Fluid Ounces | Yes (-75°F to 450°F) | Black |
| GE Sealants & Adhesives GE5030 Advanced Silicone | 9.8 Fluid Ounces | UV resistant, and freezing temperatures | Black |
| Red Devil 0826 Architectural Grade Silicone Sealant | 9.8 Fluid Ounces | Yes (temperatures below freezing) | Clear |
| 3M 08027 Marine Grade Silicone Sealant | 10.3 Fluid Ounces | Yes | White |
| Awoco Silicone Adhesive Sealant | 10.3 Fluid Ounces | Yes ( -80°F to 400°F) | Clear |
Factors to Consider When Choosing the Best Sealant for Metal to Concrete
When selecting a sealant for sealing metal to concrete, it is important to consider some factors. Because concrete and metal surfaces can be very different, the type of sealant you use needs to be able to accommodate those differences.
You have a wide variety of sealants to choose from on the market, and you should make your choice wisely. The following factors can help you to identify the best sealant for your needs:
1. Type of Sealant
As you already know, silicon-based sealants are good options for metal and concrete, among many types of sealants.
There are a few different ways to tell if a sealant is silicon-based. One way is to look for a label or indication on the product packaging.
Many sealants will list the ingredients on the label, and silicon-based sealants will typically include silicone in the list. You can also check out the product description to find out about the information on sealant.
2. Flexibility
When concrete and metal surfaces are joined together, there is always the potential for movement.
Materials may expand or contract as a result of temperature changes, expansion, or contraction. The concrete caulk must accommodate this movement without cracking or peeling.
A flexible sealant will be able to do this. You can typically find information about the flexibility of a sealant in the product description or on the label. If you are interested in knowing how flexible the sealant is, you can also read online reviews.
3. Adhesion
If you are looking for a sealant that will adhere well to both metal and concrete, then you need to choose a sealant with good adhesion. Adhesion is the ability of a material to adhere or bond to another material.
When choosing the best caulk for concrete to metal, you want to make sure that it has good adhesion to stay in place and not peel or flake off.
Many factors can affect the adhesion of a sealant, such as the type of materials being bonded, the surface roughness, the temperature, and the amount of time that the sealant has to cure.
By using a sealant with good adhesion, you can be sure that it will stay in place and provide a lasting seal.
4. Resistance to Temperature Changes
Choosing a sealant with resistance to temperature changes for metal to concrete applications.
If the sealant is not resistant to temperature fluctuations, it can contract and expand at different rates than the materials it is bonding with. This can lead to cracking, popping, or complete failure of the sealant.
Sealants that are not resistant to temperature changes can be more difficult to apply, as they may not flow evenly at different temperatures.
The use of a sealant that has been specifically designed for metal to concrete applications will result in a strong, durable bond that will withstand the elements. Check to see how much temperature changes the sealant can withstand, both hot and cold.
5. Resistance to Water
As the main job of a sealant is to fill in gaps and prevent water from passing through, it is essential to choose a sealant that is waterproof. If the sealant is not waterproof, it will not be able to do its job properly.
Water can cause the sealant to degrade, crack, or peel. It can also lead to mildew growth. When choosing a sealant, make sure to check the product label or description to see if it is waterproof.
You may also wish to read online reviews to learn what other customers have to say about the sealant’s ability to resist water.
6. Application and Curing Times
When you are choosing a sealant, you also need to consider the application and curing times. The application time refers to the length of time it takes for the sealant to dry and become hard.
A sealant’s curing time is how long it takes to fully cure and provide optimal protection. Most sealants have a curing time of 24 hours, but some may take up to 72 hours.
It is important to choose a sealant with a curing time that is compatible with your schedule. When you need the sealant to be ready more quickly, you should choose a sealant with a shorter application time. If you can afford to wait longer, then you may choose a sealant with a longer curing time.
How Much Temperature Change Can the Silicone Sealant Withstand?
The amount of temperature change a silicone sealant can withstand will depend on the specific product. Most silicone sealants are designed to maintain a strong bond in both hot and cold weather.
Silicone sealants can withstand temperatures between 400 and 450 degrees Fahrenheit for high-temperature applications. Silicone sealants can be used in low-temperature applications down to -100 degrees Fahrenheit.
It is always best to check the label of the specific product to be sure. By doing so, you can ensure that the silicone caulk you select will be able to withstand the temperature extremes of your particular project.
Is Concrete Sealer Toxic?
There are many different types of concrete sealers available on the market, and not all of them are equally safe. Some sealers contain harmful chemicals that can be toxic if inhaled or ingested. This is why it’s important to choose a sealer that is safe for both you and the environment.
Silicon-based concrete sealers are generally considered to be the safest option. These sealers form a protective barrier on the surface of the concrete without leaching harmful chemicals into the air.
The best way to determine whether a sealer is safe is to carefully read its label. A sealer’s label should list all of its ingredients and any warnings associated with them.
You can always contact the manufacturer for more information if you have any questions regarding the safety of a particular sealer.
What Is the Lifespan of Sealants Applied to Metal and Concrete?
Various sealants are available on the market, each with its own characteristics. While some sealants are designed for temporary use, others are made to last for several years.
The lifespan of a sealant also depends on the environment it is in. For example, sealants that are exposed to sunlight and extreme temperatures will typically have a shorter lifespan than those that are not.
How long a sealant lasts will also depend on how much damage it experiences. Sealants that see heavy traffic or are constantly exposed to water or other chemicals will generally last less than those that do not.
With proper care and maintenance, most sealants can provide long-lasting protection for metal and concrete surfaces.
How Do You Store Sealant After Opening?
When you open a can of sealant, you need to be sure to store it properly so that it doesn’t dry out or become contaminated. The first thing you need to do is make sure that the can is tightly sealed.
If there is any air in the can, it will cause the sealant to harden and become unusable. Once the can is sealed, you should store it in a cool, dry place. A garage or shed is a good option, as long as it isn’t too hot or cold.
The sealant that is exposed to extreme temperatures will also harden and become unusable. Be sure to check the date on the can before using it. Once sealant reaches its expiration date, it will no longer be effective.
By following these simple storage tips, you can be sure that your sealant will be ready to use when you need it.
Seal Metal to Concrete With Quality Sealant
Hopefully, you now better understand the importance of sealing metal and concrete surfaces with a good quality sealant.
To make sure you purchase sealant that meets your needs, follow the buying guide we have provided. The products listed in this article are all of the excellent quality and will provide you with the protection you require.
By comparing each product’s features, benefits, and limitations, you can make the right decision for your needs. We are optimistic that you will find the best sealant for metal to concrete.