Concrete Crack Sealers

Riley Kim
15 min readJun 18, 2024

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Are you tired of constantly repairing cracks in your concrete surfaces? Look no further, as we’ve gathered the best Concrete Crack Sealers on the market just for you. Get ready to bid farewell to those pesky cracks once and for all.

The Top 10 Best Concrete Crack Sealers

  1. Quikrete Blacktop Crack Sealer — Efficiently repair blacktop cracks with the easy-to-use Quikrete 864005 Blacktop Crack Seal, designed for seamless adhesion to all surfaces and no mixing needed.
  2. Quikcrete Gray Crack Seal for Permanent Repair — Easily fill and seal concrete cracks with Quikcrete’s durable, ready-to-use Latex Emulsion for long-lasting results.
  3. Quick and Easy Magic Crack Filler for Hairline Cracks in Concrete — Magic Crack Filler: The DIY, mess-free solution for quickly and easily filling hairline cracks in concrete, providing adjustable leveling for floors and beams.
  4. QT Sakrete Concrete Crack Filler 1 qt Bottle — QT Sakrete Concrete Crack Filler is an easy-to-use, water-resistant solution for sealing cracks up to 1/2" wide and 1/4" deep in various surfaces, offering a long-lasting repair for driveways, walkways, patios, and slabs.
  5. Quikrete Fast Set Concrete Crack Repair — Efficient and Durable Solution — Quikrete Fast Set Concrete Crack Repair quickly fills cracks from hairline to 1 inch, offering a durable and easy-to-use solution.
  6. Loctite Polyurethane Concrete Crack Sealer for Repair and Masonry Sealant — The Loctite Polyurethane Concrete Crack and Masonry Sealant offers a self-leveling, long-lasting bond and protects against weather, perfect for repairing cracks in various surfaces.
  7. All-Surface Lanco Concrete Crack Sealer — Smooth-filled sealing power: Lanco’s Elastomeric Crack Filler for interior and exterior use bridges gaps, prevents leaks, and holds strong against weathering.
  8. Dap Acrylic Crack Filler for Concrete Repair (16 oz, Gray) — The DAP 7079860500 Gray Acrylic Crack Filler offers a quick and efficient solution for repairing cracked concrete, providing a seamless result with zero shrinkage and weather resistance.
  9. Dap Liquid Cement Crack Filler — Concentrated Gray Crack Sealer — Dap Liquid Cement Crack Filler offers an easy, self-leveling solution to repair horizontal concrete cracks quickly, while maintaining a durable and water-resistant finish.
  10. Multi-Purpose Concrete Crack Sealer by Quikrete — Restore and repair any concrete surface with Quikrete’s versatile 8.6 oz Epoxy Concrete Repair, effortlessly sealing cracks and holes!

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Reviews

Quikrete Blacktop Crack Sealer

I’ve been using the Quikrete Blacktop Crack Seal for a few days now, and I must say, it’s been a game-changer in handling those pesky cracks on my blacktop driveway. With no mixing required, I simply pour the liquid seal directly onto the affected areas. Its uniformly blended formula helps it adhere seamlessly to the blacktop, blending in perfectly with the surrounding surface. With its slight odor, it’s not too overpowering while performing the job. However, I did notice it’s a little on the heavier side, as it has a specific gravity of 1.4 to 1.53.

One issue I encountered is that it’s not as easy to spread as I initially hoped, with its viscosity being a bit thicker than desired. Nevertheless, it worked great in filling small cracks, and time will tell how long these repairs last. So overall, while I appreciate its ease of use and its ability to blend into the surrounding surface seamlessly, I think it could use some tweaks in its spreadability to make it even more user-friendly.

Quikcrete Gray Crack Seal for Permanent Repair

As a concreter, I’ve tried my hand at using different products to seal and fill cracks in my concrete surfaces. Recently, I came across the Quikcrete Concrete Crack Seal, and was rather intrigued by its claims of easy use and durability. I decided to give it a go, and I have to say, it lived up to most of these expectations.

First off, the consistency — it was thicker than I had expected, but that’s not necessarily a bad thing. It was just perfect for filling the small cracks on my driveway, and the uniform latex emulsion made it easy to blend in with the natural gray color of the concrete. The ease of use was another plus — no mixing was required, I could simply pour it straight from the bottle.

Despite the ease of use, I did encounter a few clogs towards the end of the bottle. However, a quick shake every so often seemed to remedy the situation. I have also noticed that the bottle doesn’t seem to be the sturdest, and it could leak a little if dropped.

But overall, I’m pleased with the Quikcrete Concrete Crack Seal. It’s convenient, and as long as you are careful with potential clogging issues, it can be a reliable product for your concrete repairs.

Quick and Easy Magic Crack Filler for Hairline Cracks in Concrete

This Magic Crack Filler provides an easy and convenient solution for filling hairline cracks in concrete and mortar. Its unique dry powder formulation ensures a mess-free experience, making it an ideal choice for DIY projects.

With the ability to easily install and provide adjustable levels, this crack filler offers a versatile solution for tackling different needs around the house. Its quick application and long shelf life are another draw, which makes it a go-to choice for those who value convenience.

Users have shared positive experiences, stating that it effectively fills cracks, provides a smooth finish and works great both indoors and outdoors. However, be mindful when opening the package as some customers found the powder to be a bit unexpected.

Overall, Magic Crack Filler earns high praise from users, making it a top pick in the market.

QT Sakrete Concrete Crack Filler 1 qt Bottle

The QT Sakrete Concrete Crack Filler is a reliable product for filling cracks in concrete surfaces up to 1/2" wide and 1/4" deep. It offers both interior and exterior use, protecting from water penetration, and can even be painted with latex-based paint. Its intended use includes driveways, walkways, patios, and slabs.

One notable aspect of this product is its ease of use with its compact design and user-friendly spout. The instructions clearly illustrate the process of application and curing times, ensuring a smooth experience. However, there are some potential drawbacks to using this crack filler. Users have reported that it takes an extended period to dry, with a duration of 12 to 24 hours under normal temperature and humidity conditions.

In terms of durability, this crack filler has mixed reviews. Some users have experienced impressive results, holding up for years, while others have reported the filler cracking and falling apart not too long after application. The product’s shelf life is also a concern, as some users have found it to harden over time, leaving a thick residue at the bottom of the bottle that is challenging to mix properly.

Another concern raised by users is the lack of an expiration date or manufacturing date on the packaging, making it uncertain for how long the product can be used after opening. The consistency of the product also seems to be a factor, with some users describing it as the consistency of pancake batter, while others have found it too thick and difficult to work with.

Overall, the QT Sakrete Concrete Crack Filler is a decent option for sealing small cracks in concrete surfaces, but its potential drawbacks regarding drying time, durability, shelf life, and consistency might warrant further consideration before making a purchase.

Quikrete Fast Set Concrete Crack Repair — Efficient and Durable Solution

Meet QUIKRETE FastSet Concrete Crack Repair, your go-to solution when it comes to repairing cracks in concrete surfaces. It’s not just any epoxy, it’s a hybrid polyurethane that forms a strong bond, ensuring lasting repairs. The self-leveling formula is perfect for filling cracks of various widths, and it has the versatility to be applied to both interior and exterior surfaces.

One of the biggest advantages of this product is the quick drying time. In one hour at 77 ‘F (25 ‘C), you’ll be ready to open your repaired surface to traffic. It’s mess-free, too, with a low viscosity that resembles water, allowing it to get into those hard-to-reach places.

However, it’s not all smooth sailing. Some users have reported that the product can be difficult to dispense due to the design of the cartridge and the mixing tip. There have also been instances where the product didn’t cure to the desired color, leaving behind a yellow or blackish stripe on the surface.

Despite these minor drawbacks, the QUIKRETE FastSet Concrete Crack Repair is a reliable product that fills cracks effectively and lasts as long as concrete. Remember, to make the most of this product, always check the expiration date, read and follow the instructions correctly, and use common sense when applying.

Loctite Polyurethane Concrete Crack Sealer for Repair and Masonry Sealant

Loctite’s Polyurethane Concrete Crack and Masonry Sealant is a life-saver for me when it comes to filling and sealing concrete cracks. I have used it in various settings, from my front porch to my driveway, and it always leaves me feeling more connected to the Earth.

One highlight that truly shines through with this sealant is its self-leveling property. It’s like magic in a tube — it automatically fills and smooths out cracks, saving you from the hassle and frustration that comes with manually spreading fillers. And the best part? It doesn’t require any fancy tools. You can use this on concrete, brick, stone, and even metal surfaces! It’s also water and weatherproof, adding a layer of protection against those pesky intruders like frost and rain.

Now, onto the pros and cons of this product. The pros make this sealant a no-brainer. It dries slowly, which is a selling point when you’re dealing with irregular shapes or craggy surfaces. This gives you ample time to guide and spread the sealant, ensuring a perfect bond. Plus, it’s durable and can withstand a lot of stress and movement without losing its integrity. It also boasts a good finish, leaving your surfaces looking clean and polished.

As for the cons, there’s really just one: the odor. It’s not overpowering, but it’s noticeable. However, it’s a minor issue when compared to the overall performance and ease of use this sealant provides.

One small anecdote: I recall a time when I needed to seal a tricky crack on a concrete wall — it was deep and had an uneven texture. I applied the sealant and waited for it to do its work. As advertised, the sealant filled the gap perfectly. I was pleasantly surprised by how easy it was to use. The odor was barely noticeable at that point, thanks to the satisfying results I had achieved. I’ve been a believer in this sealant ever since.

In conclusion, Loctite’s Polyurethane Concrete Crack and Masonry Sealant is a top-notch product for anyone looking to fill and seal concrete or masonry cracks. It’s versatile, easy to use, and can stand up to the tests of time and weather. Sure, there’s a slightly unpleasant odor, but in the grand scheme of things, it’s a small price to pay for such a powerful tool.

All-Surface Lanco Concrete Crack Sealer

The Lanco Siliconizer Crack Knife Grade RC230 is a versatile and efficient crack filler designed for large cracks and holes. Its higher viscosity enables it to fill deeper sections without sagging, while its acrylic base ensures a smooth application that matches surrounding areas.

Users appreciate its easy soap and water clean up, and its formulation is ideal for various surfaces. However, some have experienced issues with packaging, but the product’s durability and ease of use make it a top choice for sealing leaks and repairing cracks on both interior and exterior surfaces.

Dap Acrylic Crack Filler for Concrete Repair (16 oz, Gray)

The DAP Concrete Crack Filler is a hassle-free solution for repairing cracks in concrete surfaces. It’s a unique, water-activated dry powder that forms a seamless repair in just one pass. The low-dust formula ensures easy pouring and filling of horizontal cracks, making it a quick and efficient repair for various surfaces.

One of the standout features is the zero shrinkage, which results in a permanent and seamless repair that won’t sink, shrink, or crack. The product is also weather and UV-resistant, making it a reliable choice for outdoor repairs. Users have praised its ease of use, fast drying time, and long-lasting durability.

However, some customers have noted that the product can become clogged in the applicator tip and may need a bit of extra shaking during application. Additionally, a few users have found that they needed to reapply the product for a complete fill. Despite these minor drawbacks, the DAP Concrete Crack Filler has been a favorite among users for its effectiveness and ease of use.

Dap Liquid Cement Crack Filler — Concentrated Gray Crack Sealer

DAP Liquid Cement Crack Filler is a versatile and easy-to-use product designed to repair horizontal concrete cracks. This ready-mixed formula offers a gray finish that complements most existing concrete surfaces. With a self-leveling capability, it helps create a professional finish in your repairs.

However, be aware that it only fills cracks up to half an inch in width, whereas using DAP Ready-Mixed or Dry Mix Concrete Patch should be considered for cracks larger than that. Users generally appreciate its ease of application, durability, and water resistance.

While the product has its negative aspects such as sagging or inadequate flow under certain circumstances, it still ranks well in comparison to other products in its category.

Multi-Purpose Concrete Crack Sealer by Quikrete

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Introducing the Quikrete 8.6 oz Epoxy Concrete Repair — a reliable and versatile solution for fixing cracks and holes in your concrete surfaces. This product is perfect for both professionals and DIY enthusiasts, offering an easy-to-use formula that delivers impressive results.

One of the highlights of this product is its ability to work effectively on various concrete surfaces, making it a versatile option for your repair needs. The 8.6 oz epoxy formula is specifically designed to withstand harsh outdoor conditions, ensuring that your repaired surfaces are durable and long-lasting.

However, one potential downside is the drying time, which is a mere 1 hour. While this is quite fast, it may not be enough time for larger repair projects. Additionally, the product is exclusively suitable for exterior use, which could limit its versatility for some users.

In terms of application, the Quikrete 8.6 oz Epoxy Concrete Repair is quite user-friendly and convenient to use. It comes with a neat container size, making it easy to handle and store. Overall, this product is a great choice for anyone seeking a reliable and efficient epoxy concrete repair solution.

Buyer’s Guide

When dealing with concrete cracks, it’s essential to find the right concrete crack sealer to ensure the longevity and structural integrity of your surfaces. Here are some key features, considerations, and general advice for selecting the best concrete crack sealer for your needs.

Types of Concrete Crack Sealers

Concrete crack sealers are available in different forms, including epoxy, silicone, and urethane. Each type offers unique benefits and drawbacks for specific applications. For instance, epoxy sealers provide excellent water resistance and durability but may be less flexible than other options. Silicone sealers offer excellent flexibility, while urethane sealers offer the best balance between flexibility and durability.

Considerations for Choosing the Right Concrete Crack Sealer

When selecting a concrete crack sealer, consider the following factors to ensure the best results: the type and cause of the cracks, the environmental conditions, and the expected foot traffic. For example, if the cracks are due to expansion and contraction, consider using a sealant that can accommodate movement. If the area has high foot traffic, select a more durable sealer that can withstand wear and tear.

Application Process and Maintenance

The application process and maintenance are crucial factors when choosing a concrete crack sealer. Some sealers require expert application, while others are DIY-friendly. Proper application ensures a better bond between the sealer and the surface, leading to a longer lifespan. Regular maintenance, such as cleaning and resealing, can also help extend the life of the sealer.

Eco-Friendliness and Safety

Environmental concerns and safety should not be overlooked when selecting a concrete crack sealer. Look for products that are VOC-free and compliant with OSHA regulations to minimize any health risks. Additionally, consider the environmental impact of the product during production and disposal. Opt for eco-friendly sealers and follow the manufacturer’s guidelines for proper disposal to contribute to a greener world.

FAQ

What is a concrete crack sealer?

Concrete crack sealer is a product designed to seal and prevent water from seeping into concrete cracks and crevices. It effectively restores the structural integrity of the concrete and improves its appearance by filling up and enhancing the surface of the cracks. Applications for concrete crack sealers range from roads and sidewalks to bridges and buildings.

Concrete crack sealers offer long-lasting durability and protection against future damage, extending the lifespan of the concrete structure. They often come in an easy-to-apply liquid or paste form and can be used by both professionals and DIY enthusiasts. Popular formulas typically include waterproof adhesives, polymers, and sealant agents to create a flexible, strong, and durable barrier against water and moisture.

Are there different types of concrete crack sealers available?

Yes, concrete crack sealers come in various forms, each specifically developed for specific applications. Some of the most common types include:

  1. Liquid sealers: These are versatile and suitable for various surfaces and concrete conditions. They are easy to apply and cure, offering a flexible bond that can accommodate minor expansion and contraction. 2. Epoxy-based sealers: These offer excellent resistance to water, chemicals, and extreme temperatures. Their two-part system ensures a strong bond and a long lifespan. 3. Polyurethane-based sealers: These offer excellent durability and resistance to traffic wear and chemicals, making them suitable for high-traffic areas such as parking lots and driveways. 4. Silicone-based sealers: These provide excellent adhesion to different surfaces and materials, offering a flexible and long-lasting solution for sealing concrete cracks and joints.

Choosing the right sealer depends on factors such as the specific application, the size and depth of the cracks, the environmental conditions, and the desired lifespan of the sealant. Consulting the product’s recommendations or seeking professional advice can help determine the most suitable crack sealer for a particular project.

How do I prepare the surface before applying the concrete crack sealer?

Surface preparation is a crucial step to ensure the crack sealer works effectively and lasts. Before applying the sealer, cleaning the concrete surface is essential to remove dirt, oil, grease, or any other contaminants that could hinder the chemical bond of the sealer. Use a mixture of water and a mild detergent or a concrete cleaner to clean the area. If the concrete surface has any loose or flaking parts, use wire brushes or other appropriate tools to remove them, ensuring a smooth and clean surface for the sealer to adhere to.

Regarding the depth of the cracks, if they are too shallow, the sealer may not penetrate, leaving the joint vulnerable. For cracks wider than 1/4 inch, a deeper injection of sealer may be necessary to guarantee a proper seal. It is also essential to ensure that the cracks are dry before applying the sealer. If necessary, you may cover the cracks with plastic sheeting to help draw out moisture.

What is the drying time for concrete crack sealers?

The drying time for concrete crack sealers can vary depending on the specific product and environmental conditions. Generally, you should check the product’s label or manufacturer’s instructions for more precise information regarding drying times. As a rule of thumb, most crack sealer drying times fall within the range of 4 to 24 hours at room temperature. Prolonged drying is preferable to rushing the process, as faster drying might result in uneven curing or reduced effectiveness of the sealer.

Factors such as air temperature, humidity, and the presence of contaminants can influence the drying time. For instance, applying the sealer during colder months or in areas with high humidity might prolong the drying process. To ensure optimal results, it is best to follow the recommended application and drying conditions provided by the manufacturer.

How long should a concrete crack sealer typically last?

The lifespan of a concrete crack sealer depends on multiple factors, including the type of substance used, environmental conditions, foot or vehicle traffic, and the depth and width of the cracks. On average, a high-quality crack sealer can last between 5 to 10 years, but this time frame may vary depending on the specific product and its applications.

Regular maintenance and inspections of the area can help detect any damage or potential issues early. If any visible signs of deterioration or cracks appear after a few years, it might be necessary to apply a fresh coat of sealer to restore the concrete’s water resistance and structural integrity. Always consult the manufacturer for detailed information on the product’s warranty and performance expectations.

Is applying a concrete crack sealer DIY-friendly or should it be done by professionals?

Applying a concrete crack sealer can be DIY-friendly, especially for smaller, less complex projects. Liquid and paste-based sealers, in particular, are relatively easy to apply and are often suitable for homeowners or those with some experience in DIY projects. Make sure you follow the manufacturer’s guidelines and safety precautions.

For more extensive or delicate projects involving deep cracks, heavy traffic, or complex surfaces, it is recommended to hire a professional crack sealer applicator. They have the necessary expertise, tools, and knowledge to ensure the job is completed correctly, yielding the best possible results. Moreover, professionals can address any underlying issues affecting the integrity of the concrete structure and provide additional recommendations for long-term maintenance.

As an Amazon Affiliate™ we may earn through qualified purchases!

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