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Author: Ed Lloyd

How to Use Bondfill Concrete Crack Filler

How to Use Bondfill Concrete Crack Filler

Cracks are prone to occur even in unexpected areas. It could be that building you are working on, bridges, roads or even huge dams. That aside, we shall be talking about repair on a small scale, something that doesn’t involve hanging on the side of a huge bridge for repairs but something you can apply at home, work or anywhere if necessary.

House with Green Door

Why Does Concrete Crack?

Concrete cracks are related to the changes in the external conditions which interact with the chemical composition of the concrete floor. Here are some reasons for concrete cracks:

1. Using too much water in the mix- excess water generally reduces the strength of the concrete, making it more vulnerable.

2. Rapid drying of concrete – Concrete creation main depends on a chemical reaction which helps transform the concrete from liquid, plastic and eventually solid. But all this cannot happen without water. This is why it’s mandatory to pour water on the concrete every now and then on the slab. To yield a durable and string concrete floor.

3. Improper strength of concrete- Contractors have to verify which strength of concrete is to be used on different constructions. Using the wrong one yield cracks eventually. There are many reasons why cracks occur but these are the common reasons.

Why Fill Cracks?

There are many reasons why you should consider filling the cracks either on your concrete floor or outdoor path. Some of them include: To prevent water from seeping through the cracks To prevent further damage. Now that you have an idea of some of the causes and reasons for repair. Let’s kick off.

First, you require to have the right filler for the job. Among the most proficient fillers, you can come across is the Bondfill Concrete Crack Filler. It is viscous and flexible to repair the product by preventing water intrusion. They are available in 950ml bottles. The product has been and is still in use since 1936 by professionals. It is considered the best choice due to the following reasons:

  • It is high quality, viscous, versatile and most of all durable for concrete surfaces.
  • It protects concrete surfaces even in very low temperatures.
  • Ready to use and can be used on cracks of up to 1/2 inch wide by 1/4 inch deep.

DIY Tools

How to Fill Cracks

In preparation for the following procedure, ensure that you are well protected. Using gloves and any other protective clothing is one way to safeguard your properly. Don’t apply the product during winter when temperatures drop below 10 degrees Celsius of ( 10 degrees Fahrenheit). There are mainly two types of cracks. We are going to be dealing with the wide and narrow concrete cracks.

Clean the targeted surface to lose concrete, water and other unwanted material that hinder the adequate performance of the filler.

Repairing Wide Concrete Cracks

To pull this through you have to undercut the sides of the crack first. This will provide you with a “V” shape where you can place the repair material.

  1. Using a chisel and a hammer widen the base of the crack dislodging any loose material from the old concrete.
  2. Ensure that you get rid of all unwanted material using a wire brush.
  3. Dry shop vacuum or a brush to ensure that there is no water or debris in the targeted area.
  4. Shake the container with the filler vigorously to mix its contents efficiently.
  5. Now, put the compound into the cracks. Also, ensure there are no air pockets while you are doing this. While filling the crack pay keen attention to the surrounding concrete surface as well.
  6. To smoothen the surface of the patch, use a towel to feather the compound into the surrounding concrete. Using a paintbrush, you can fix the surface to the desired finish.
  7. Allow the curing process to take place. Ensuring the are is protected has external conditions, like rain, for 24 hours. Also, no cement-based products should be applied in on top of the filler.
  8. Finally, paint or seal the surface of the crack to match the surrounding concrete.

Repairing Narrow Concrete Cracks

Filling these types of cracks is a piece of cake. Using a caulking gun, you can complete this task in minutes. However, products like Bondfill have their bottles modified for this purpose.

  1. Apply the filler on the targeted area.
  2. Using a putty knife or trowel smoothen the area of focus.

Narrow cracks are at times deep. They can even run through the entire thickness of the concrete. This is why you should start the repair by staffing foam beaker into the crack to create a base to hold the repair material. You can do this using a screwdriver up to a depth of 1/4 inch. It is recommended that users should follow the manufacturer’s directions to prevent a mess.


Are you tired of the way your cracked concrete appears? Then you know exactly what to do to transform it. The best part is that you can do it yourself with no help from a professional. Put your skill to work by trying the methods above for an outstanding professional approach. Do it like a pro.


How to Fix Cracks in Damaged Concrete

How to Fix Cracks in Damaged Concrete

Cracks are bound to appear on concrete walls, floors, and slabs. They form habitats for some dangerous animals that might harm you or the people around you. Furthermore, they might cause some unnecessary accidents. Even worse, these cracks will minimize the aesthetic value of your house, office and other premises. You have to fix the cracks as soon as possible.

Cracks on Old Wall

It is quite unfortunate that most people do not know how to fix cracks in damaged concrete. A good number of homeowners will opt to seek the help of a professional to seal those ugly cracks. This is an exercise that you can do by yourself. In fact, you will incur less concrete repair costs.

There are many ways you can fix cracks in damaged concrete. Not all the methods are reliable. Some will just offer a short term solution. Obviously, that is something you do not want. It is important to go for a long-lasting remedy. Before you start your DIY concrete repair process, there are some important factors you need to put into consideration. These factors will ensure you have a smooth and easier repair procedure.

Size of the Cracks

You have to know the type and size of the cracks you are dealing with. Confirm if they are large or small. Then you can provide an appropriate solution that will see you get rid of this problem once and for all. Some cracks just need a basic sealing and they will be gotten rid of. Others need you to employ intense sealing and use of strong sealants. Get to know the cracks in your concrete wall before you proceed. It is the first and important step in fixing the cracks.

Concrete Sealants

To fix the cracks, you will need to use some reliable sealants. The sealants will help cover the cracks for good. You have an assignment to determine which sealant is the right fit for the cracks in your concrete. This means you will have to study the type of cracks you are dealing with. Through that, you can apply the best sealant that will see off the cracks. There are a lot of crack sealants that you can use. They include polyurethane and epoxy resin sealants just to name but a few. These materials are not only reliable but also durable. They will seal the cracks in the best way possible. Sooner than later your concrete will regain its great aesthetic value.


Apart from sealants, you also need some materials to help you cover the cracks. The materials vary depending on the procedure you adopt in fixing the cracks. All in all, the materials you choose should be able to help you eradicate this torment. Some of the materials used in this regard include concrete crack filler, masonry caulks, urea caulks, Hydraulic cement, caulking gun, cold chisel, whisk broom among many more. Remember the process of fixing the cracks tend to vary from one person to another. You have to use the most suitable procedure.

Fixing the Cracks in Concrete

You have to take this process seriously. It is an important undertaking that should help you curb concrete cracks, once and for all. Here is a suitable DIY process that will help you fix the cracks in your concrete.

Cracked Concrete

1.Necessary materials and tools

First things first, you need to gather the needed materials and tools. Here you will need, sealer, concrete patch material, caulking gun, cold chisel, and whisk broom. They should be made readily available for the process that is about to follow. This will ensure you save a lot of time.

2. Clean the concrete floor, slab or wall

Before you use any type of filler, ensure the concrete you are attending to is clean. Get rid of any dirt, oil or debris. The concrete filler can only work effectively on a clean slab. Therefore cleanliness of the concrete is a big deal. Ensure you take care of it as soon as possible.

3. Chisel the Crack

You will need to get rid of any big pieces available in the concrete cracks. To help you do so, ensure you use a chisel. Hold it at a suitable angle and together with a hammer, chisel these cracks. This will help make the sealant to bod perfectly with the concrete crack.

4. Vacuum and Brush

This step gets rid of any debris, dust, and dirt present in the cracks. First, use a quality whisk broom, after which you can use a vacuum to clean those cracks efficiently.

5. Fill the cracks

Time to fill those cracks by using a concrete filler. Ensure you follow the rolled out instructions. After you have filled the cracks, you can monitor them to confirm if the used filler has already settled.

6. Give it time to cure

Give it enough time to cure. At least 24 hours will be enough for the healing process to take effect. Come back and check if there is a possible need for an additional patch.

7. Seal the cracks

It is now time to use your preferred sealant. The sealant should cover the patches and cracks once and for all. In that connection, you need to use a sealant such as polyurethane. It is ideal for concrete floors that have rough or an ugly finish. You can use a brush or broom to seal those rough patches left behind.


The process of fixing cracks on a concrete wall or floor should be taken seriously. Remember, cracks are so ugly that they will put the aesthetic value of your house in jeopardy. Getting rid of them is the only way that will help you restore the value of your house. Make sure you apply a reliable remedy. You need durable materials and an efficient procedure altogether. You can use the one discussed above, to help you with this exercise. Make sure you follow the steps and instructions given. Gather your materials in advance in order to have a smooth and easy process afterward.

The Dangers of Water Damage to Unsealed Concrete

The Dangers of Water Damage to Unsealed Concrete

While being an essential component of concrete, water in excessive quantities will provoke damages that can be very hard to repair. Exposure to moisture can also compromise the life span of concrete structures and the resistance of the materials over the years. Some of the circumstances that are likely to affect the durability of the structure are:

  • Water standing in the concrete for too long
  • Leaks of water
  • Groundwater with poor drainage
  • Scarce protection for the structure
  • High humidity levels

If underestimated, the destructive power of water can cause a number of dangers:

Steel reinforcement corrosion

Corrosion takes place when water and oxygen stay in touch with steel for a prolonged amount of time. Without one of these components, the damages of corrosion will not occur: dry steel, for example, won’t corrode on its own if not when in contact with moisture. When water damages happen, prompt intervention with the proper drying procedures is essential to stop the corrosion from taking place. Additionally, impermeability of concrete can be a crucial factor in preventing corrosion of the reinforcement steel lying underneath.

steel reinforcement

Another element that protects steel from corrosion is the reinforcing bars, as they develop a passive layer functioning as a barrier for the steel thanks to the high alkalinity of the concrete. In these circumstances, the reinforcing steel is granted strong protection from corrosion.

However, the durability of this layer can decrease fast in time with unfavourable climate conditions. Carbon dioxide, in particular, along with bicarbonate ions, causes carbonation and lowers the pH of the concrete which can slowly break the passive layer. The calcium carbonate operates within the aggregates dissolving and decreasing the strength of the concrete, until it crumbles down to pieces. The progression of the damage and the acidification of the concrete will eventually get to the steel reinforcement, starting a process of corrosion that will make it expand, too. This is often caused by salty elements as well as acid rains. The process of carbonisation is slow, and is affected by the concrete’s density and the humidity to which it is exposed.

Humidity levels also directly affect the pH in concrete: the higher the humidity, the higher the pH and the temperature of the concrete. When the pH of the concrete raises to higher levels, so will the chances that the bonds between parts will fail.

Substance attacks

There are several substances that can interact in different ways with concrete. Low quality concrete, especially, can have small holes all over that will allow access to more water with its corrosive substances. The deeper these substances go, the more materials they can damage.

Chlorides, for instance, will destroy the layer of protection formed around the rebars over the steel reinforcement. In absence of an iron oxide protection film around the steel, the corrosion process will start to take place.

Another corrosive substance is the Sulfate contained in dissolved forms in the water that makes it through the concrete.

The sources of Sulfate attacks can be:

  • High-sulfate lands
  • Pollution
  • Bacterias
  • Seawater

Sulfate attacks can be very dangerous, changing the concrete’s composition and microstructure. This will cause cracking of the concrete, which can sometimes be very extended; expansion of the mass can also be another dangerous consequence, as well as the bond failure between aggregate and cement paste.

sea water

Along with corrosive substances, pores in concrete also make way for microbial growth. Bacteria, microbe and mold grow best in environments with high humidity and temperatures. Despite the fact that concrete does not provide organic materials in sufficient quantities for the mold to be able to feed itself, its pores can trap lots of organisms that can be food sources for mold to grow, such as dust, pollen, microorganisms and salts. The growth of mold also involves the release of its acids which can cause serious structural damages to the strength and the durability of the materials.

Deterioration of the concrete

Cracking and expansion of deteriorating concrete constitute another serious damage caused by water. This slow process is caused by alkali hydroxides reactions in aggregates: cracks will facilitate the intrusion of water, which will penetrate through the concrete and make it to the reinforcement bars, initiating corrosion process even in high-grade buildings.

There can be two different forms of alkali reactions in aggregates depending on the element present in the concrete aggregates:

Alkali-Silica reaction (ASR)

Alkali hydroxide present in concrete reacts with silica, which can be alarming as aggregates often contain silica elements.

The reaction results in the creation of a gel that absorbs the water in its surrounding environment, whether that is stuck in the concrete or in the concrete paste; the gel then swells up, increasing in volume and causes expansive pressure that will eventually make the concrete crack.

Cracking of the concrete is one of the most common indicators that an alkali reaction with silica is in course.

Alkali-Carbonate reaction (ACR)

This type of reactions is more rare: carbonate materials tend to be less commonly used in concrete and aggregates, as they are normally unsuitable for construction purposes. The reaction with carbonate causes similar damages as the alkali reaction with silica, involving expansion pressure with subsequent cracking.

Freezing water

Water that is stuck in the aggregates can represent a high-risk to the life span of non-air entrained concrete. In fact, if temperatures decrease enough that the water freezes to ice, its mass will expand by 9% its original size and will start occupying more room. This unpredictable increase in volume cannot be sustained by the structure as there is no space available for the expanding water and will lead to distress for the concrete, the most obvious consequence being cracks.

Furthermore, the formation of thaws will make the ice defrost some bits into water, which will penetrate further down the concrete cracks, freeze again and expend again, increasing the amount and the sizes of the original cracks. This cycle will keep going causing greater damage to the concrete. Spalling, scaling and exposed aggregates are evident sign of a freeze and thaw cycle that is in course of action within the concrete.


Keeping water, humidity and wetness away from the concrete, or properly drying the materials as soon as the water damage took place, can prevent any damage to the structure in order to keep the building’s strength and preserve its original life span.