Concrete is one of the most enduring and robust building materials available. It resists cracks for a long time if properly cured. However, this does not always occur, and fissures appear on the surface.

This can be highly upsetting for a homeowner. To make matters worse, finding a long-term strategy to heal those fissures is quite difficult. 

Then we recommend that you use the best concrete caulk. It will work for you to fix cracks in a variety of concrete surfaces, including walls and floors. That’s not even the most exciting part!

Caulks, also known as sealants, can help you get rid of cracks in a shorter amount of time. It’s basically a less sticky and dry solution that fills cracks in order to heal them.

You’ll find sealants and caulks to assist you restore your concrete surface in this guide. Continue reading to find out which caulk is best for your concrete repair requirement.

8 best concrete caulk reviews

1. Red Devil Masonry & Concrete Acrylic Sealant Repair 

Red Devil 0646 Masonry and Concrete Acrylic Sealant, Pack of 1, Gray
  • TEXTURED LIKE CONCRETE: Blends easily with concrete and mortar
  • SEALS CRACKS & JOINTS: Works on concrete, masonry, stone, cinder block and brick
  • WON'T STAIN OR BLEED: Mimics the look of concrete or mortar

Talk about a caulk that’s made exclusively for mending concrete cracks. That’s exactly what the Red Devil sealant provides.

It comes in a 300mL squeezable tube that weighs 15 ounces, making it incredibly portable. The acrylic compounds, on the other hand, have a particular composition that provides exceptional durability. As a result, when exposed to the environment, it does not chip, break, or peel.

In addition, this caulk is extremely water resistant. Nonetheless, we advocate using it in regions where there is little or no water contact. This is due to the fact that acrylic does not repel water as well as silicone. 

Another benefit of this sealant is that it is suitable for outdoor use because it does not discolor or stain. It’s also paintable, so you can choose a color that complements the concrete after it’s been applied. Its tint, however, is slightly gray and fits in well with the mortar. The finish is rough, yet it’s also smooth and elegant.

It works on a variety of surfaces, including wood, stucco, cinder block, and brick, in addition to masonry and concrete. 

You can quickly clean up the mess once you’ve finished applying the concrete caulk using water. One thing to keep in mind about this product is that it takes 6 days to properly cure. Aside from that, it effectively fixes a variety of concrete-related issues. 

Pros

  • Water clean-up
  • Weather-resistant, durable, and waterproof
  • The surface is textured
  • Paintable

Cons

  • It takes a long time to heal

2. Loctite PL Polyurethane Concrete Crack Sealant

Loctite PL S40 Polyurethane Window, Door and Siding Sealant, 10 Ounce Cartridge, White, 12-Pack...
  • Professional Grade Sealant: A one component polyurethane sealant developed especially for forming permanent seals in exterior gaps and joints
  • Windows, Door & Siding: Seals all exterior gaps and expansion joints and is paintable to blend in with surrounding surfaces for a professional finish
  • Durable & Flexible: Elastic sealant remains permanently flexible with a movement capability of ±25% to resist tears and cracks with shifts in building materials

If you have a horizontal fissure in your concrete floor, this Loctite Self-Leveling sealer is a great option. It’s all because of its incredible features. What exactly are these characteristics? Let’s take a look at each one separately.

For starters. The polyurethane-rich mixture is an excellent construction material. This is because it guarantees the sealant’s long life and durability. Abrasion and rip resistance are other strong features of the caulk. As a result, even when exposed to external elements, it will not peel, break, or chip. 

As a result, this sealant will work well no matter where you live. Not to mention how flexible it is because it is not impacted by concrete expansion and contraction.

In terms of packaging, the caulk comes in a 295mL tube that is easy to work with.

Furthermore, it remains firmly adhered to the surface after application, preserving the crack repair. It adheres to a variety of materials, including metal, wood, and stone, in addition to concrete. Aren’t these amazing features? You’ll be shocked to learn that these aren’t even the most outstanding feature of this product. That honor belongs to the self-leveling feature. This means that the caulk will settle itself after application, leaving you with a smooth and consistent surface.

Furthermore, because this caulk is paintable, you can precisely match the mended component to the surrounding area. Because of its liquid consistency, this caulk is not suitable for mending vertical fissures. 

Pros

  • Self-leveling
  • Strong adherence
  • Flexible and long-lasting
  • Weather-resistant

Cons

  • Vertical cracks are not good
  • Curing time is lengthy

3. Sashco Slab Concrete Crack Sealant

Sashco - 16210-12 Slab Concrete Crack Repair Sealant, 10.5 Ounce Cartridge, Gray (Pack of 12)
  • Moves with your concrete: Extremely elastic to move with your concrete through changes due to shifting soils, temperature, moisture, and traffic to create a weatherproof seal that banishes dandelions, anthills, and other unsightly crack dwellers.
  • Cuts down on repeated repairs: Just say no to brittle, cracked concrete repairs. In addition to extreme elasticity, Slab is specifically formulated with tenacious adhesion to concrete. This perfect balance of sticking and stretching translates into repairs that last for years, not just months.
  • Won’t stick out: Textured and colored to blend in with aged concrete for a seamless appearance.

The Sashco Slab Company was founded in 1936 with the goal of providing solutions to issues that looked insurmountable. And the company has created some incredible caulk formulations throughout the years. This Slab Sealant is their best sealant for concrete cracks!

It’ll be useful in a variety of circumstances. There’s nothing this sealant can’t handle, from huge fractures in a building job to minor gaps in your driveway.

The main feature of this sealant is its excellent adherence. While it may take a long time for the concrete to dry, once it does, it will be free of cracks for years. It also prevents moisture from leaking into the fractures, extending the life of the concrete. 

The caulk comes in a handy 10.5 fl. Oz. bottle. Simply squeeze the bottle to release the compound, which will readily come out of the small nozzle. It’s that easy. It’s made to fill cracks that are up to 3 inches wide. However, if you need to work on short – and long-length cracks rapidly, we recommend using a caulk gun.

When this compound dries, it develops a light gray tint that mixes in nicely with the concrete. You can also sand and paint the dry compound if the surrounding surface is painted. 

Pros

  • Excellent adherence
  • Waterproof and long-lasting
  • Color is a universal concept

Cons

  • Simple to use
  • A little pricey
  • It takes a long time for the paint to dry

4. General Electric Concrete & Masonry Silicone II Caulk

GE Sealants General Electric GE5020 Concrete and Masonry Silicone II Caulk, 10.1-Ounce, Grey,...
  • This product is highly durable
  • The product is manufactured in United States
  • The product is easy to use

In the realm of silicone technology, General Electric Sealants and Adhesives is a well-known name. They have a creative and dedicated strategy that allows them to develop a variety of high-quality building items. That’s where you’ll find our Generic Electric Silicone II Caulk. 

What makes this caulk so unique? That’s most likely due to the fact that it’s one of the few sealants that becomes water-resistant almost immediately after application. As a result, if it’s about to rain, don’t put off sealing your concrete because this caulk has you covered.

Unlike most caulks, it just takes 3 hours to dry and form a solid bond. And, as you may be aware, most concrete crack sealants dry completely in around 24 hours. As a result, owning GE 5020 will help you save time while also increasing the task’s efficiency and speed. 

Even better, this caulk isn’t simply water resistant. Instead, it can resist nearly all types of extreme weather, including extreme heat and cold. It also has everlasting elasticity, which keeps its quality from deteriorating when frozen and thawed repeatedly. Furthermore, it prevents mold from growing in concrete fractures by not allowing any area for it to do so.

One disadvantage of this sealer is that it cannot be painted. However, because its gray hue blends in well with most concrete surfaces, we don’t expect this to be an issue.

Pros

  • Waterproof
  • Time to dry quickly
  • Constant adaptability

Cons

  • Universal and lovely light gray color
  • It isn’t paintable

5. Dap Self-Leveling Concrete Sealant

12 Pack Dap 18370 3.0 Advanced Self-Leveling Concrete Sealant - Gray 9-oz Cartridge
  • Withstands foot & vehicle traffic after fully cured
  • Can be applied in all weather and below freezing temperatures
  • Won’t crack or shrink & provides excellent adhesion, flexibility and durability for a permanent waterproof seal

Some individuals find it exceedingly difficult to level caulk until it is totally dried. Furthermore, if the caulk dries unevenly, lumps might form, which are unsightly.

Isn’t that something no one wants?

Furthermore, quick caulk leveling necessitates a great deal of skill and practice.

Consider how difficult the task will be for novices and unskilled workers.

Fortunately, such is no longer the case with Dap’s self-leveling sealant, which becomes consistent immediately after application. 

DAP, being one of the leading caulk manufacturers, has introduced a number of excellent goods to the market, including this concrete sealant. Why is it better than other caulks? So, let’s take a look at some of its great features!

To begin with, this caulk is constructed of premium silicone rubber, which ensures longevity and effectiveness. It’s packaged in a squeezable bottle and comes out in a semi-liquid state with a gray hue. 

Although some people dislike its color, you’ll be relieved to learn that it can be painted.

Second, the mixture has a light odor that isn’t overpowering. It’s also weather-resistant, which means it won’t get wet or shrink as a result of the elements.

This caulk also features KWIK Dry Technology, which allows it to dry in just three hours. Not to mention that it’s waterproof, which keeps mold and bacteria from growing on the surface. As a result, you can use it in areas other than concrete, such as the kitchen and bathroom.

Pros

  • Waterproof and resistant to the elements
  • Self-leveling with low odor
  • Paintable, flexible, and long-lasting

Cons

  • Vertical cracks are not good 

6. Bluestar Flexible Concrete Crack Filler

Bluestar Flexible Concrete Crack Filler (Light Gray)
  • TWO SHADES of GRAY to choose from - (GRAY & LIGHT GRAY)
  • FLEXIBLE in HOT & COLD WEATHER
  • FILL CRACKS UP TO ONE INCH WIDE

Concrete cracks aren’t always large; others are as small as one inch broad. However, the size of a crack should not be taken into consideration. These little cracks do, in fact, eventually grow into something larger. That’s when a product like Bluestar Concrete Crack Filler comes in handy. This filler also protects the surface from rainwater in addition to repairing cracks. Because this filler is meant to cover microscopic cracks, it’s incredibly easy to use. It comes in a squeeze container with a tiny tip for filling surface gaps with minimal mess.

As a result, no sophisticated instruments are required throughout the application procedure. This makes it one of the best concrete crack caulks, particularly for novices. Because of its fluid texture, it should not be used on vertical surfaces. Another advantage of this filler is that it may be used in both cold and hot temperatures. Because of its flexibility, it can react to the natural contraction and expansion of concrete under various weather situations.

The filler dries to a paintable light gray finish after application. However, based on the original color of your concrete surface, you can choose a gray tone. 

Pros

  • Beginners will love it
  • Waterproof
  • Fills cracks in concrete up to 1” wide
  • Light gray and gray hues are available

Cons

  • The improper shade creates an odd appearance on the surface

7. Sikaflex Self-Leveling Sealant

Sale
Sikaflex Self Leveling Sealant, Gray, polyurethane with an accelerated curing capacity for sealing...
  • Premium quality sealant, concrete self leveling caulk. No tooling required, levels itself. It is Water immersible & waterproof after cure
  • PERFORMANCE: Self-leveling, pourable with permanently elastic and can be painted with water-based, oil-based or rubber-based paints. Able to bridge gaps up to 1.5 in. wide
  • SUPPORTS: Excellent adhesion on concrete and cementitious slabs.

This Sikaflex self-leveling sealant doesn’t require any tools to level, making it ideal for quick crack repairs that you can leave alone. Surprisingly, because of the ability to layer the sealant, it can bridge gaps up to 1.5 inches wide.

It’s paintable, sandable, and stainable once it’s set, so you can blend it in and make the gap disappear if you’re using it to fill gaps in walls. 

It’s flexible and resilient after it’s cured, so it can take whatever you throw at it. It’s also water and weatherproof, so you won’t have to keep an eye on the weather if it rains once you’ve filled the gap.

The one drawback is that it only comes in 10oz bottles, so while buying a single bottle is inexpensive, the expenses may rise if you have a larger patch job to complete. 

Pros

  • The term “weatherproof” refers to the ability to fill the gap even while it is raining.
  • Because the spaces are paintable, you can blend them out completely.
  • Has the capacity to layer filler cover gaps up to 1.5 inches wide.
  • The filler may be directed with ease using the pinpoint nozzle

Cons

  • Only comes in 10oz bottles, which limits the amount coverage
  • When you require many bottles, the costs quickly add up 
  • Smaller patch tasks are better suited to this product

8. DRYLOK 00917 Waterproof Hydraulic Cement

Sale
DRYLOK 00917 Cement Hydraulic WTRPRF, 4-Pound, Gray
  • Set time: 3-5 minutes
  • Stops water, even under pressure
  • Anchors metal to masonry

This DRYLOK hydraulic cement is special in that it sets even underwater, unlike normal cement, which dislikes wet. The water initiates a chemical reaction in the concrete, causing it to harden.

It’s the appropriate product for pool restorations because of this. This filler fixes metal to masonry, so you can use it to reattach the pool ladder to the wall. It also takes 3 to 5 minutes to set, which is quite quick.

It can resist up to 3,050 pounds of hydrostatic pressure and prevents water from flowing even when under pressure. The only drawback to this product is that it comes in powder form, which means you must mix it yourself. In comparison to pinpoint bottles, it is also more difficult to apply.

You do, however, receive more coverage, which allows you to fill in larger gaps and holes. 

Pros

  • Withstands pressures of up to 3,050 pounds,
  • Sets are perfect for pool maintenance because they may be used even underwater.
  • It cures in half the time, so there’s no waiting.
  • Metal to masonry adhesive

Cons

  • It is less convenient to use because it is not pre-mixed 
  • It’s more difficult to use than pinpoint bottles.
  • Tooling is required to smooth the surface.

Why concrete is ideal for driveways

Concrete is a solid and long-lasting driveway material because it is sturdy, dependable, and can sustain the weight of vehicles and regular traffic. When placed appropriately, it is heat-resistant and does not quickly succumb to damage. It requires little upkeep and can be modified using stamping techniques, making it a popular choice among homeowners wishing to add dimension and texture to their driveway.

Concrete also has a long lifespan and can support your driveway for many decades with only minor cleaning and maintenance required. 

Not all cracks are created equal

Concrete cracks for a variety of reasons, and identifying the type of fracture you have will help you better troubleshoot the origin of your cracks and how to fix them.

Concrete Supply Co.’s concrete experts have determined that there are roughly six main types of concrete cracks, five of which we’ll go over in more detail because they’re pertinent to driveways:

  • Plastic shrinkage cracks are microscopic, web-like cracks that are light and thin and originate from too much water in the concrete mixture.
  • Expansion concrete cracks are caused by the concrete surface swelling as a result of higher temperatures, causing grinding in cracked concrete plates, resulting in heightened and sharpened cracks as well as uneven concrete layers.
  • Concrete heaving cracks are caused by the earth freezing, unfreezing, and moving over time, forcing the top layer of concrete to move with it and appear as long, narrow fissures.
  • Settling concrete cracks are broader than other cracks and originate from too much gap between the concrete’s base and top surface.
  • Improper drying cracks emerge in small but frequent cracks in concrete that hasn’t cured properly, mainly due to the concrete drying too quickly due to a low water ratio

By assessing the cracks in your driveway, you may take control of the situation using the correct filler for the sort of concrete fractures you have. 

Other factors that contribute to concrete cracking

Consider the various elements that can contribute to low concrete quality or serve as the root source of the problem, as well as how they connect to your cracks, after you’ve determined what type of concrete cracks you have. Here are several examples:

  • Inadequate site preparation
  • Insufficient mixing ratios
  • Pouring techniques that aren’t well-planned
  • The failure to use sealants
  • Weather conditions in general
  • Extensive use

All of these things have the potential to cause your concrete to crack over time. 

Best concrete crack caulk buying guide

Caulks are little things used to seal cracks in concrete. Don’t let this fool you into thinking there aren’t any features or traits to consider while making a purchase. Here are some characteristics to look for in a concrete caulk to illustrate this:

Curing time

The shorter the time it takes for a caulk to dry and cure, the more convenient it is for you. The majority of concrete caulk takes roughly 24 hours to dry, although some can take as short as 3 hours. When purchasing concrete sealants or caulks, keep in mind that different materials require varied amounts of time to cure. 

Temperature tolerance

Because temperature changes, concrete naturally interacts and expands. As a result,  once the fracture is filled, the concrete will retain these qualities. As a result, you should choose a flexible crack sealant that can withstand the contraction and expansion of concrete. 

Crack width

On varied-sized fissures, several types of concrete caulk function well. Some are made for large, deep cracks, while others are good for small cracks. Furthermore, the consistency of these crack sealants varies. As a result, thin and hairline crack fillers are usually supplied in bottles with small nozzles or tubes for easy application.

Ease of application

It’s important to use the right technique when applying the repair filler. Sealants and caulks come in tubes with pinpoint nozzles, making them the easiest to use. It means you have more control over where the filler goes, allowing you to be more precise with your placement.

Weather resistance

Weather-resistant concrete crack fillers should be able to keep water out.

Concrete can be degraded by penetrating water over time, causing it to crack and disintegrate. Sealers are especially effective in this situation since they fill the gap while also lowering the porosity of the surrounding concrete.

Keeping water out is especially critical in chilly areas. Ice formed when water penetrates a concrete surface and the temperature goes below zero. Massive fissures, foundation failures, and disintegrating wallas are all possible outcomes. Concrete blocks can be pushed out of their mortar by frozen water. 

Mixing method

Many liquid caulks, sealants, and patches come pre-mixed, but not all. Dry mixes require water, then hand mixing until they achieve the proper consistency, which is determined by a mixture of the manufacturer’s guidelines and how runny you prefer it to be. It’s ideal to stick to the mixing instructions as precisely as possible, but if required, thin the mixture with a small quantity of extra water. 

Users will combine a resin compound with a hardener in the case of an epoxy. Most concrete epoxies, fortunately, come in tubes with self-mixing nozzles. Just keep in mind that these products harden quickly, so you’ll only have a limited amount of time to complete the task. Because they may be put to vertical surfaces and prevent groundwater from leaking through, they’re common in foundation repair kits. 

Color

While the color of your caulk isn’t a consideration right now, it will become a problem once you’re through. Most caulks can be painted, so you can easily acquire the color you want once you’re finished.

There is, however, some non-paintable caulk for concrete cracks. So, if you’re ordering a non-paintable caulk, make sure it’s the same color as the area where your crack is. 

Caulking gun requirement

Some caulks need the use of a caulking gun. The cannon guarantees a sufficiency flow of caulk, maintains a consistent pace, and prevents overspilling. Caulking guns, on the other, are rather expensive and generally difficult to use. If you’re using a caulking gun, you may need to seek professional assistance. So, before you go out and buy a caulk for concrete gaps that require a caulking gun, be sure you understand everything. 

Types of caulk for concrete

Concrete caulks come in a variety of shapes and sizes, each with its own purpose. The most common types are as follows:

1. Repair caulk

The composition of this caulk is latex-based. The fact that it works on both horizontal and vertical surfaces sets it apart from other crack sealants.

2. Crack sealant

Crack sealants are mostly used to repair and fill small cracks less than 12 inches wide. They’re also only used on horizontal surfaces because of their uniformity. They’re normally packaged in a container with a precise tip for easy application. Sealants are also self-leveling, which is a unique property.

3. Patching compound

Dry cement powder and premixed patching mixtures are available. They’re intended primarily for small cracks, and the application technique is similar to that of normal cement. As a result, you’ll need a trowel to fill in the crack and smooth it out. 

4. Hydraulic cement

Simply by looking at the name, you can understand that this caulk is intended to seal leaking concrete fractures. As a result, it has a short curing time. Because it’s in powder form, you’ll need to combine it with water to make a malleable dough to apply. It can be used to fix cracks in both horizontal and vertical directions. 

5. Quick-setting cement

Quick-setting cement is another typical type of concrete caulk. A crack filler that can be used to mend cracks that are between 0.5 and 1 inch broad. Because this cement is powder, you’ll need to combine it with water to make a paste. You may need to use a bonding solvent to assist speed up the setting process. This also makes the repair more long-lasting and robust.

6. Concrete resurfacer

The process of resurfacing concrete entails applying a thin coating of cement that is blended with bonding and chemical agents. It hardens as it cures, becoming stronger and more durable as you pour it over your current concrete surface.

Resurfacer is an excellent product for fixing huge expanses of concrete and shallow fractures.

Preventing future cracks

After you’ve successfully browsed through the many varieties of crack fillers and decided which one you want to buy, it’s critical that you also take actions to maintain the reinforced integrity of your concrete for long-term use after the fillers have been put. Although crack fillers can stop existing cracks, they can’t always prevent new ones from forming. However, with the correct preventative steps, you can.

Add sealants

Consider applying a sealer to your concrete every few years to keep it from cracking and deteriorating. Sealants are liquid solutions that are placed to the surface of concrete to solidify it and protect it from harm from the top layer. They can help harden concrete and prevent scratches and oil stains from penetrating the porous surface and reducing the beauty and cleanliness of the concrete surface.

Sealants must be reapplied to maintain your concrete in good shape, and the type of sealer you choose will influence how often your concrete driveway needs to be re-coated. Acrylic-based sealants must be re-applied more regularly to achieve the same results as epoxy-based sealants, which can last up to a decade.

Power-washing concrete

Power-washing your concrete, or cleaning it with high-pressure water, will ensure that any dirt and debris are removed from the small pores of the concrete, preventing discolouration. To eliminate undesired dirt, you can employ professional power-washing services or purchase a home power-washing system.

Concrete crack fillers can be power-washed with ease since they provide moisture protection and prevent water from leaking into your gaps.

Frequently asked questions

How do you apply concrete caulk?

Start by scrubbing the cracked area to get rid of any filth. Then grab your sealant and give it a good shake to completely mix the components. Then, open the nozzle, lay it on the crack, and gently squeeze the bottle/tube until it is completely filled. Now you can let the caulk dry.

Can you remove caulk from the surface after it has dried?

Yes. Using a chisel or grinding tool is the simplest method. Place the chisel’s tip gently against the caulk you want to remove, then tap it with a hammer to remove it. Repeat this process along the cracked region.

What is the drying time of concrete caulk?

The length of time it takes for caulk to dry varies depending on the size and depth of the crack, as well as the type of caulk utilized. Concrete crack fillers, for example, take about 24 hours to dry. As a result, you must keep it dry until it is completely dry. There are some caulks, however, that dry in about 3 hours.

Which is the most flexible concrete caulk?

The most flexible caulk are those made of polyurethane. They’re also the most user-friendly, with the ability to twist, bend, and extend them more than other caulks. Another advantage is that they are more robust and compatible with most surfaces. They are, however, more expensive.

What is used to make concrete caulks?

The majority of caulks on the market today are silicone, acrylic, or latex-based. Some goods, however, are made up of a combination of these elements.

Is paint an alternative to caulk?

This question has an easy answer: no. Caulk is a specially designed compound that fills cracks and holes while also being weather and damage resistant. Paint, on the other hand, is prone to damage and wear and tear.

Paint is quickly washed away by rain and fades over time, however caulk does not. As a result, when dealing with cracks, always apply caulk. After you’ve sealed the glasses, you can use glue to fix them.

What is the best time to apply caulk?

Get your caulking tools available if you see a hairline crack in your concrete structure. The easier it is to fix cracks, the smaller they are. Taking too long can result in larger holes that are difficult to repair with caulk. Take a look at some of the removable caulk in our list; they might be of interest to you.

How long should I wait before painting on my caulk?

It takes a long time for the caulk to completely dry. Adding paint before caulk is applied can cause the seal to be compromised. As a result, we advise that you wait at least three days before painting over the caulk.

Final words

A concrete caulk comes in handy when it comes to weatherproofing or doing repairs around the house. Especially since you just need one spray to totally eliminate concrete fractures.

That’s why we’ve decided to assist you in selecting the best concrete caulk available. Always keep in mind that the greatest product is one that meets your specifications, demands, and budget. With that, you’ll have no trouble finding a concrete sealant that will improve the comfort of your home.

Last update on 2022-04-23 / Affiliate links / Images from Amazon Product Advertising API