Will epoxy fill cracks in concrete?

Concrete is a mix of cement and aggregate, meaning it’s made from a combination of sand and stones.

Cement is the main ingredient in concrete and consists of clay, limestone, and sulfate minerals. One way to make concrete is to combine it with water. A mixture will form in molds until the mixture hardens.

An additive called epoxy can hold the batch together for longer periods of time than normal. This combined with other steps like adding water, weighing down against air bubbles, etc., allows you to create good-looking structures that are strong enough to last for decades.

What is the best way to fill cracks in concrete?

The best way to fill cracks in concrete is with epoxy filler. The good news is that this method is easy and you don’t need much equipment or experience to do a great job. Here’s what you’ll need:

  • A drill for mixing the material
  • A caulking gun, or other tools for applying epoxy
  • Epoxy filler, which comes in tubes like caulk or as a thick paste (similar to putty)
  • A screwdriver or other tool for cleaning out the crack of any debris before filling it
  • Gloves for protection from the epoxy, since some products may be toxic if they come into contact with skin

Can you repair concrete with epoxy?

You might be wondering whether epoxy can be used to fill cracks in concrete. The short answer is yes, but it’s a bit more complicated than that. Epoxy is a great material for repairing and filling cracks in concrete. It has the ability to bond together materials that wouldn’t normally bond, such as wood and concrete (more on this later).

Because it’s so versatile, epoxy can be used in a variety of ways—from fix-it jobs around your house to huge construction projects. But when you’re dealing with small repairs like filling cracks in your basement floor or driveway, one thing remains true: epoxy will always do the job better than anything else out there.

Epoxy is stronger than most other materials because of its ability to bond materials together that otherwise wouldn’t bond naturally. This makes epoxy ideal for use in situations where other fillers would break down or fail over time due to water penetration or movement from underneath the surface being repaired.

Can epoxy be used to fill cracks?

It’s important to realize that epoxy and other concrete crack fillers are not designed to “fill” cracks. They’re designed to create a bond where the edges of the cracks have been joined together.

Epoxy is best for holes, not for large-scale cracks in concrete. If you need to fill large cracks in concrete, your best bet is a product like [polyurethane caulk](/articles/polyurethane-caulk) or [hydraulic cement](/articles/hydraulic-cement).

Will epoxy fill holes in concrete?

No, epoxy should not be used to fill holes in the concrete. Epoxy is a very hard adhesive, and it will not bond properly to the sides of a hole. If you want to fill holes in concrete with epoxy, use something like caulk instead. Caulk is flexible and works much better for this purpose.

However, if you have a crack in your concrete, then epoxy can be used to fill those cracks! Epoxy is great for filling cracks because it is strong enough that it will not fall out of the crack when moisture or water passes through it.

However, before you start filling any holes or cracks with an epoxy make sure to prep your space first! First off if your area has any grease stains on it or other dirt stains then make sure to clean them up before applying any type of filler over them as they won’t stick well otherwise.

Also, keep in mind that even though epoxies are strong they’re still pretty brittle so don’t try using them on gaps larger than 1/4 inch wide as they might break under pressure from the surrounding concrete surfaces pressing against them (this could happen while walking across the surface too!).

How do you fill cracks in concrete before epoxy?

The first step to filling the crack is to clean it. You should use a putty knife or syringe to fill the crack with epoxy resin, and then smooth the surface. After you’ve done this, apply a 1/8″ layer of epoxy filler over the cracked area. Next, fill the crack with sand until it’s level with the rest of your concrete surface. Finally, apply a second layer of epoxy filler and let dry before walking on it again.

How do you cover cracks in concrete?

  • Use a concrete sealer. Concrete sealers are products that help to fill in hairline cracks in concrete and protect it from damage caused by water, chemicals, and wear. This makes them great for small cracks because you won’t have to do much repair work before applying the sealer—just brush off any loose dirt or debris, then follow the manufacturer’s instructions for application.
  • Use an epoxy concrete repair compound. Epoxies are chemical compounds used to fix cracks in many types of surfaces including concrete, wood, metal, and more. They consist of two main parts: a resin and a hardener which cure together to form a strong bond. The best way to use this type of product is by following the instructions on your specific brand or model: as long as everything goes according to plan, you’ll wind up with results that look good as new!
  • Use a concrete patching compound. These compounds can be used on both vertical and horizontal surfaces such as walls or floors where there is no movement needed (they’re not flexible enough). They come in different colors so they match whatever else you want covering up around your home without having too obvious looking patches everywhere; just make sure not to add too much water when mixing them together otherwise they’ll take longer than the usual curing process!

What to use to fill cracks in live edge slabs?

Polyester and acrylic can be used to fill cracks in decorative concrete surfaces, but you don’t want to use either of these materials on a live edge slab. Both polyester and acrylic materials will bond with the fibers in the wood when they dry, making it difficult to remove them if you need to make adjustments later on. It’s best to stick with one of these materials instead:

  • Wood filler
  • Epoxy
  • Putty
  • Mortar
  • Polyurethane
  • Fiberglass
  • Silicone

What does epoxy not stick to?

Epoxy is a great adhesive, but it’s not the right answer for every situation. Epoxy doesn’t stick to plastic, rubber, or grease. You can use a paintable silicone to cover any metal that you don’t want to adhere to the product.


It’s important to remember that, while epoxy is an effective crack filler, it isn’t always your best option. The most telling sign of whether or not a crack is appropriate for epoxy filling is the width. If the crack is wider than half an inch, then you probably should consider other options such as cement.

This is because epoxies are designed to be used on smaller cracks and will not bond properly if they are spread too thin.

Additionally, bear in mind that there are some situations in which it’s better to leave a crack unfilled entirely. For example, if a concrete slab has settled unevenly and has sunken in one particular area of the floor, then sealing the crack may just trap moisture inside the slab and cause more damage when freezing temperatures hit. Instead, you should jack up the sunken portion of the slab with a bottle jack and fill underneath with sand before using epoxy to seal up any cracks that have formed around this repair process.

Photo of author

Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

Leave a Comment