Best Concrete Crack Filler | Sealing & Repairing Cracks Easily

Such cracks not only spoil the surface of the concrete but also lead to further deterioration and damage. Hence, it is critical to repair these cracks in time. Although, now it's possible to repair cracks if you don't know exactly how to repair cracks in concrete. There are several products available to help fill up such cracks quickly and restore the cement surfaces to their former condition, without any prior experience. 

However, selecting the best concrete crack repair product from the thousands of products that are available on the market requires both time and effort. To help get around this problem, we bring you this review and buying guide with all the essential products worth considering after conducting experiments in our yard with concrete crack fillers.

We spent a considerable amount of time researching and testing out these concrete crack sealer products and comparing them with the competition. This review lists the advantages and disadvantages of every product mentioned to help you make an informed decision.

So, without further ado, let's get started! 

Listed below are the 5 best concrete crack fillers from our list:

• DAP Liquid Cement Crack Filler: Distinguishes itself with a speedy cure time, ease of use, and the ability to seamlessly blend with surrounding concrete, although its open shelf-life is short.
• Red Devil Concrete Patch Filler: This provides an ideal solution for paintable surfaces and an easier cleaning process, but it may need multiple applications for wider cracks.
• Sashco Concrete Filler: Noted for its versatility, it works great on both horizontal and vertical surfaces with strong temperature resistance, although it takes longer to set.
• Bluestar Flexible Concrete Filler: This DIY-friendly filler stands out with high resistance to temperature changes and is an effective solution for high-traffic areas, however, the quantity might seem less considering the price.
• DAP Concrete Patch Interior and Exterior Filler: Specialises in filling wide and deep cracks with a durable finish, but it may not blend well with surrounding concrete material.

So whether you're a homeowner looking to spruce up your driveway or a contractor in need of a reliable product for your next job, here's the list of the 11 best concrete crack fillers to help you get started.

1. DAP Liquid Cement Crack Filler - Best Quick Cure Time

The DAP 37584 Liquid Cement Crack Filler is one of the highest-rated products in its category. This crack filler is an easy-to-use product that helps permanently seal cracks in concrete and is suitable for both indoor and outdoor usage based on our firsthand experience, we used this in our garage and outside too, in an area in which the car brings salt and chemical compounds throughout winter, a rather harsh environment.

The DAP 37584 is an excellent product that is simple enough to use even for first-time users. It is a ready-made filler that comes in a bottle, so you don't need to mix or blend anything. This makes the crack filler very easy to use and helps save both time and effort. 

One of the most significant advantages of this concrete crack filler over others is that it works very quickly, and doesn’t take a long time to set or cure the concrete. Your concrete floor will be as good as new within 30 to 45 minutes, or at the max under an hour according to literature while in our tests, it dried in 33 minutes.

You can use the DAP 37854 on both interior and exterior surfaces, and it self-levels to match the gray of your concrete. It even helps to blend the repaired section with the surrounding areas of the surface it’s used on. 

The quick-acting feature of this product is one of its most significant advantages. However, this also results in the solution drying up quickly once the filler bottle is opened. This means that you won't be able to store the product for long periods after opening it. The best way is to use the cement filler entirely after opening the bottle. 

2. Red Devil Concrete Patch Filler - Best for Paintable Surfaces

For those who don't know, Red Devil is one of the biggest names in the American sealant industry. It specializes in the manufacture of high-quality caulks, sealants, adhesives, etc. The 0644 is one of the best products from the company for sealing up small cracks, gaps, and large patches in concrete. 

Through our trial and error, we discovered that if you are looking for a “set it and forget it” crack-filling experience, the Red Devil 0644 is the most obvious choice. The premixed filler formula is suitable for cracks as well as patches and makes repairs easy and quick, seamlessly, as our tests showed. 

One of the most significant advantages of this crack filler is that it is paintable, a great feature for indoor surfaces, you can use it to repair areas and then easily paint over them, we used this in our garage. The formula of the sealant does not react with the paint and remains stable; this is a feature that many products on the market do not offer. 

Most concrete fillers make it highly difficult to clean the surface. However, with this concrete crack repair, cleaning the surface where you apply this product is also a straightforward process; just use soap and water. This makes the product ideal for use even in areas that tend to get dirty quickly.

While this concrete patch filler is ideal for filling cracks and patches, larger patches require you to use the product several times as a one-time application does not provide accurate results. However, you get a superb finish after multiple applications on wide concrete cracks.

3. Sashco Concrete Filler - Best for Versatility

Next up is a product from Sashco, a leading brand offering a wide range of home solutions. The Sashco 16210 is a highly effective product for dealing with cracks in concrete surfaces. This concrete repair product comes with a complete repair kit that makes the process of application simple for all users.

We have found the Sashco 16210 to be an excellent product for a wide variety of applications. It is perfect for use on sidewalks, garages, driveways, patios, and more. Again, we used it in front of the garage with great results. Besides being a multipurpose product, this crack repair sealant also offers long-lasting durability, preventing cracks from developing again, the manufacturer says.

The Sashco sealant is a highly versatile product perfectly suitable for use on horizontal and vertical cement surfaces. Therefore, you can also use it for repairing cracks in chimneys, pillars, etc., besides the regular flat surfaces such as roads and sidewalks.

This water-based sealant has high flexibility and is pretty resistant to strong temperature changes. You can use this crack filler on surfaces that are exposed to extreme temperatures without worrying about cracks, as the formula remains stable under excessive heat as well as cold.

In comparison to other products on this list, this concrete crack sealant takes time to set. This might become an issue if you use it in areas that receive regular traffic. However, once the filler sets, the area is entirely indistinguishable from non-damaged regions and provides a solid, sturdy surface.

4. Bluestar Flexible Concrete Filler - Best for High-Traffic Areas

One of the highest-rated concrete crack-filling products online, the Bluestar Flexible Concrete Filler is an excellent product. It helps seal up cracks and crevices effectively, ensuring a smooth surface and preventing further damage to it. And you can easily apply it yourself, making it perfect for DIY uses.

Most products available on the market for filling cracks in concrete are available in a single shade of gray. However, this crack filler is available in two different shades. This makes it easier to select the shade that matches the concrete surface where you need to apply the sealant, if you are happy enough to match your cement or concrete at home, you won't need to paint over anymore, after trialing this at home, in both shades, we failed to match the old concrete but both shades came close though.

What’s more, the filler comes in a bottle with a nozzle that makes the application a simple and easy process. This makes it ideal for those who prefer the DIY route, as applying the filler just requires using the nozzle to pour the contents into any crack in your cement.

Another added advantage is that the product is resistant to extreme temperature changes. You can use it on surfaces that receive intense heat or cold, and the sealant will not get damaged. 

This sealant is an excellent product that fills up cracks in concrete very effectively. The only drawback it suffers from is getting a minimal amount of adhesive for the price. Most competing brands offer a higher quantity at similar price points.

5. DAP Concrete Patch Interior and Exterior Filler - Best for Wide and Deep Cracks

DAP offers some excellent products for repairing and fixing cracks in concrete. The DAP 31084 Concrete Patch Interior and Exterior is another superb product that helps you permanently seal up cracks in concrete without much effort or expense.

We were impressed by the effectiveness with which this cement filler works after trying out this concrete filler. It perfectly fills up holes and cracks in concrete without leaving any gaps for air or moisture to enter. This ensures you get a watertight seal that holds the surface and prevents further deterioration.

The concrete gap filler arrives in a well-packaged box that protects it from damage or exposure. Also,  the ready-made formula simply requires application on the surface, and you can easily store the crack filler to apply later as well.

This sealant works like a charm to fill any cracks and gaps in the concrete. The crack sealer expands to fill up the cavities and dries up to offer a hard surface suitable for traffic. It even has a perfect consistency and sticks readily to all concrete surfaces, providing fast results. 

The DAP 31084 is an excellent product, but you should keep in mind that the sealant does not blend very well with surrounding areas. As a result, it is easy to make out the repaired area from the rest of the concrete surface.

6. RadonSeal Concrete Foundation Crack Repair Kit

Among concrete crack sealants, the RadonSeal Concrete Foundation Crack Repair Kit is a must-recommend product. This concrete crack filler is one of the most effective products and utilizes innovative technology combined with scientific principles to get the job done.

For people who don't want to spend a considerable amount on getting a contractor to fix cracks in their cement, the RadonSeal Concrete Foundation Crack Repair Kit is a good contender as the kit includes all the tools and accessories you require to fix cracks in concrete and apply the filler.

Unlike most other products on the market, the manufacturer also provides a complete set of instructions for using the product, which is beneficial, especially for first-time users who require guidance on using the product to fix cracks and crevices properly.

What makes this crack filler even more impressive is that it offers unmatched protection against moisture. Areas that tend to develop leaks due to condensation get completely fixed and dry up over time with this concrete filler.

Compared to similar products, it is costly, which might put some people off from trying it out. First-time users can consider spending on a more affordable alternative, but this product is still cost-effective when compared to the cost of hiring a contractor, our research indicates.

7. PC Cement Crack Filler Products

PC Products is a brand that has been offering quality home repair solutions for over 55 years, and the 72561 PC-Concrete is a perfect example of how good their products are. It not only helps repair cracks in concrete but also provides anchoring and support.

The PC Products 72561 is a multifunctional crack repair product that is sure to exceed your expectations, thanks to its dual epoxy adhesive paste not only helps repair cracks in concrete but is also perfect for anchoring threading rods, bolts, and more into concrete.

The concrete crack filler offers the added benefit of being applicable to dry and wet surfaces, making it ideal for damp environments. Additionally, it does well when used on vertical surfaces or cracks, making it suitable for walls, chimneys, etc.

One of the features that set it apart from most sealants is that the filler does not leave behind a mess, just leave it to set after filling in the required cracks, and the filler won't leave behind any residue. You can easily use it without worrying about cleaning up afterward.

While this product provides excellent results without a doubt, it requires some effort for proper application. Getting the sealant out of the tube requires the right tools, and applying it to concrete surfaces requires some prior knowledge and expertise.

8. Rust-Oleum Epoxy Shield Concrete Patch and Repair Kit

Rust-Oleum 301012 is an exceptional product for sealing and repairing cracks in concrete. It is a two-part industrial-strength epoxy that bonds with the concrete permanently. This makes it one of the best choices for a highly effective and permanent solution to fill concrete cracks.

Based on our firsthand experience the Rust-Oleum 301012 turned out to be one of the most effective products in the market. It not only repairs cracks in concrete but also creates a surface that is harder than regular concrete, this concrete filler provides durability and prevents further damage.

Apart from this, the crack filler is easy to use. You simply need to mix both epoxy parts in the quantity desired and apply them to the cracks in the concrete. The sealant will quickly adhere to the surface and fill the gaps, even entering hard-to-reach crevices quickly. 

As it sets fast, you do not need to worry about not using the surface for an extended period. Additionally, the repaired surface will look better than those with vinyl concrete patch compounds.

Like most products on this list, this sealant can withstand a reasonable variation in temperature. However, in extreme heat or frost, cracks tend to develop over time on the concrete. As such, should apply this product in areas that are not susceptible to extreme temperatures.

9. Damtite Concrete Crack Filler

The Damtite 04072 comes from one of the leading manufacturers of repair and restoration products. It is the ideal solution for repairing cracks in concrete surfaces such as driveways, sidewalks, etc., while also providing a permanent waterproof finish.

You will be very impressed by the quality of the Damtite 04072 Concrete Super Patch Repair. It comes as a 6 lb powder and 1-pint bonding liquid that you need to mix for applying to the concrete. The liquid and powder blend to create a solid and durable surface.

The waterproof mortar is suitable for patching, repairing, or resurfacing. It works well on concrete, masonry, stucco, and brick, and sticks to glass, steel, aluminum, and wood, enabling you to use it for several different purposes.

We also liked the fact that it sets fast and looks great after setting. The fast curing property allows it to be used on concrete surfaces that receive heavy traffic, and the repaired concrete surface will become usable within a day once you leave it to set.

While this product works well and quickly, you may face some inconvenience if you store the filler and try to use it later. It has a short shelf life and becomes unusable within a short period after being opened. So, you need to use it quickly before that happens.

10. Dalton Enterprises Crack Repair

If you are looking for an effective concrete crack filler, you must check out the Dalton Enterprises 36099. It is a contractor-grade thermo-plastic waterproof rubber that is ideal for concrete or asphalt cracks and works well to seal up cracks in concrete without requiring too much effort.

We maintain a constant effort to find products that are easy to use even for first-time users. To that end, we have mentioned several products that either come ready-made or are simple to mix. The Dalton Enterprises 36099 is one of the most accessible products despite falling into neither of the above categories.

The application process requires melting the product using a propane torch and pouring it into the cracks necessary. It fills up these cracks to create a watertight seal, leaving behind a solid surface. You can undertake the application process on your own without requiring extra help.

While similar products tend to damage the surface if over-applied, this sealant has no such drawbacks. You can apply it again on the same spot to improve the smoothness or finish of the surface; multiple applications do not reduce its quality or finish.

The Dalton Enterprises 36099 is overall an excellent product that fills up cracks in concrete very effectively. However, it does not leave behind a professional-looking surface and is only suitable for areas that do not require a clean look.  

11. GetSet2Save Hairline Crack Sealer

This list would be incomplete without mentioning the GetSet2Save Hairline Crack Sealer. As the name suggests, this product specifically helps fix hairline cracks and leaks without requiring a lot of effort. It is suitable for use on several surfaces, including sidewalks, stairs, floors, walls, etc.

This crack filler is a super-thin formula that works by capillary action to reach the source of the crack. You just need to apply the sealant at the point of damage and it will seal up hairline cracks perfectly. It’s also resistant to sunlight and provides long-lasting results on large concrete cracks.

One of the best qualities of this product is that it can enter into even the tiniest crevices, where other sealants may not reach. It is what makes it suitable for such cracks that are barely visible to the naked eye.

Besides concrete, you can also use it on other surfaces, including porcelain, window sills, asphalt, etc. No other product offers results that are close to what you get from this sealant when it comes to fixing hairline cracks.

This product works like a charm for small cracks and crevices, sealing them up permanently. Where it fails to work are areas that have larger cracks or gaps. The thin formula is unsuitable for large patches or cracks and tends to seep through them.

What is the Best Concrete Crack Filler?

This section provides a clear comparison of leading concrete crack fillers. The table below outlines key specifications for each product, including size, drying time, coverage, and color.

Buying Guide for the Best Concrete Crack Filler

Our list of the best concrete crack fillers is meant to help you find the right product that meets your requirements. 

However, selecting the product that is perfect for you from among several choices is a challenging task. Several factors need to be considered in this regard, such as durability, effectiveness, price, etc.

Hence, we’ve compiled this comprehensive buyer's guide to help simplify selecting the ideal concrete crack filler. It covers all the crucial aspects that should be taken into account while making a purchase. 

Read on to learn more about crack repair products.

1. Crack Filler Ease of Use

The foremost factor to consider while selecting a concrete crack filler is how easy it is to use. For most cracks that develop in your home, an ideal product should not require too much effort or assistance from other parties. It should involve a simple process to apply the filler and you should be able to apply it on your own. 

This factor is relevant if you want to perform the repair work without needing to hire a contractor for the same. If expert assistance is an option, then simply select the most effective sealant available.

2. Sealant Durability

Another prominent factor that needs to be considered is how long the product lasts. In general, most crack fillers last several years, and some even last a lifetime. While selecting a crack filler, you should check the reviews to find out whether the product would require frequent re-application or not. 

Durability is also affected by the location and use of the surface. For instance, surfaces such as driveways witness more heavy traffic than sidewalks and need to be more durable. 

3. Crack Filler Versatility

Several manufacturers offer products that are suitable for a variety of surfaces and materials. Depending on your requirements, you can choose a multipurpose product that works well on a single surface, like concrete. 

Multipurpose sealants can also be used on wood, asphalt, porcelain, glass, marble, etc. Generally, it is better to select a multipurpose sealant as it allows a wider scope of applications. 

4. Time Required for Repair and Curing

Different concrete fillers require different amounts of time to set correctly. It is better to select products that are set fast for areas that frequently see heavy traffic. On the other hand, relatively traffic-free areas do well with products that have a longer curing time.

The amount of time that the product takes to cure also affects the amount of time available for manipulating and adjusting the surface. A longer curing time provides a longer period for adjustment and vice-versa. 

5. Sealant Temperature and Weather Resistance

You need to consider the effect of the weather and temperature on the surface that requires fixing. Several concrete crack fillers are highly resistant to strong changes in temperature and are also waterproof. These are suitable for areas that are exposed to such elements. 

On the other hand, you can easily use crack fillers that are not waterproof or weather-resistant in areas that are not exposed. Since these areas are sheltered from heat, moisture, frost, etc., the sealant will provide excellent results.

Can sand be used to fill concrete cracks?

While it is possible to use sand or emulsified sand as fillers for the lower depths of concrete cracks, it is often not the best choice. Sand tends to wash out easily, lacks durability, and does not adhere well to the concrete. Additionally, sand alone cannot effectively address the root cause of the damage, which is often due to water seeping into the cracks, freezing, and expanding the rupture. Consequently, using sand on the upper layers of cracks is not advisable as it could result in joint failure.

How can I repair crumbling cracks on the sides of a cement driveway?

The edges of driveways are particularly susceptible to damage due to heavy vehicular traffic. To repair these cracks, start by thoroughly cleaning the cracks, and then applying a suitable concrete crack filler. In some cases, you might need to use two products together, such as quick-setting cement along with an acrylic fortifier, to effectively mend the damage.

What is the process to apply concrete crack filler in deep cracks?

To effectively fill deep concrete cracks that are approximately 1/2 inch deep and about 1/8 inch wide, caulking may be sufficient. For even deeper cracks, merely using high-quality caulk won't be adequate. Instead, line the deep cracks with a foam backer rod, using a putty knife to push the backer into the crack until it sits at least 1/4 inch below the crack's surface. Once this is done, proceed by applying caulk on top to prevent the filler from sinking once it dries.

When should I be concerned about cracks in concrete?

Concrete floors are prone to cracking. However, if the cracks change configuration and become vertical, it's a good indication to start showing concern. As a rule, a handful of cracks in concrete are not unusual, nor are they indicative of significant structural damage, as they can be caused by factors such as climatic conditions or the rate of evaporation during the drying process.

What are the different types of structural and non-structural foundation cracks in concrete?

Structural foundation cracks in concrete typically result from poor soil bearing, overloading, or substandard construction sites. Examples of such cracks include stair-stepping cracks, vertical cracks that are wider at either the top or bottom and cracks on foundation beams and slabs. Meanwhile, non-structural foundation cracks occur due to climatic influences, moisture, hydrostatic pressure, and aging. They do not compromise the structural integrity of your property and commonly manifest as narrow, vertical, or diagonal cracks, as well as cracks on plaster.