Best Caulk for Large Gaps: Top 6 Choices in 2024.

After painting your living room, you see that there are some large gaps between the wall and the floor or other areas that need caulking. You don’t want to have to repaint the entire room, so you start looking for the best caulk for large gaps.

If you don’t fix these gaps, not only will your paint job look terrible, but you’ll also have to deal with pests like mice and insects getting into your home. Caulking is an important part of home maintenance, and it’s not something that you should neglect.

The purpose of this article is to explain the top 6 caulks for large gaps, along with how to apply them. We’ll also provide some tips on what to avoid when caulking large gaps.

caulk for large gaps

Here Are Reviews of the 6 Best Caulk for Large Gaps

Choosing the right caulk is important, but it can be hard to know where to start. With so many different types and brands of caulk on the market, it’s tough to decide which one is right for your needs.

We’ve done the research for you and compiled a list of the best caulk for filling large gaps, along with their pros, cons, and verdict. Let’s take a look:

1. 100% Waterproof Gorilla Silicone Caulk

Gorilla waterproof silicone sealant that can be used to fill large gaps. The sealant is 100% silicone, which makes it resistant to water and weather. It is also clear, so it will not be visible once it is applied.

Highlighted Features:

  • Waterproof and weatherproof.
  • Clear, so it’s not visible once applied.
  • It can be used on many different surfaces and materials.
  • Dries quickly and creates a durable seal.

This 100% Waterproof Gorilla Silicone Caulk is designed to keep moisture, air, and water out. It can be used on a variety of surfaces and materials, making it a versatile option for many different applications. It is easy to apply and dries quickly, creating a durable seal that will last for years.

According to the manufacturer, this caulking is suitable for use indoors and outdoors in all weather conditions. It is supposed to be ready to use within 30 minutes, which could be very handy if you need to quickly fix a gap.

This product is ideally suited for filling large gaps and cracks. It won’t yellow, shrink or crack over time, and is available in either clear or white. It can be used for caulking large gaps in shower, kitchen, window, door, plumbing, bath, gutter, auto, marine, and many other applications.

Simple to use, unscrew the cap, fold and screw on the nozzle, then cut to the size you want. Push the bead forward of the nozzle when applying the sealant, and smooth it as soon as it dries.


  • It’s 100% silicone.
  • Indoors or outdoors use.
  • Ready in 30 minutes.
  • Clear and white.


  • Not to be used on wet or damp surfaces.


The Gorilla caulk is a good product for repairing large gaps and cracks. When used as directed, it will not yellow, shrink or crack with time. It works indoors or outdoors regardless of the weather and is easy to apply.

2. Red Devil Caulk Polyurethane Sealant:

Red Devil 090806 sealant is an easy-to-use, fast-drying sealant for filling large cracks. It is made from a polyurethane foam that expands to fill the gap and then cures to a solid, flexible seal.

Highlighted Features:

  • Fills large gaps and cracks.
  • Sandable, paintable, and stainable.
  • Resistant to weather and water.
  • Solvent-based product.

The Red Devil Caulk Polyurethane Sealant comes in handy when it comes to caulking wide gaps and spaces. It is appropriate for use both inside and outside the home and can help to insulate and prevent drafts in any area. This caulk is versatile and can be used to seal a variety of surfaces.

It can be sanded, painted, or stained after curing, providing versatility in various applications. This caulk is perfect for use around windows and doors, as well as in other areas where a tight seal is needed. It dries quickly and forms a strong bond, making it ideal for anywhere-at-home projects.

The Red Devil is an excellent product for smaller jobs where a larger can is not needed. Simple to use, it provides a tight seal that is weather- and water-resistant. The 8 oz. size reduces waste and the product is easy to store.

It is a solvent-based product, so it requires careful cleanup. However, it can also provide a strong and durable seal that is perfect for use in areas that may be prone to moisture.


  • Fast drying.
  • 8 oz. size.
  • Tight seal.
  • Simple to use.


  • Solvent-based product requires careful cleanup.


Red Devil sealant can fill large gaps and cracks and is a versatile, easy-to-use product. As it drys quickly and is extremely durable, it is perfect for use around the house.

3. Great Stuff Caulk Big Gap Filler

This Great Stuff caulk is ideal for filling in wide gaps. It’s an insulating foam sealant that will keep your home warm in the winter and cool in the summer. Just squirt it into the gap and wait for it to expand.

Highlighted Features:

  • Smooth and has a nice finish.
  • Six minutes to tack-free.
  • Can be trimmed and painted in just 30 minutes.
  • Can be used indoors or outdoors.
  • Wood, metal, drywall, glass, and masonry are usable.

This Great Stuff Caulk Big Gap Filler is great for filling large gaps. It is thin and smooth Specifically, it is a 20oz big gap foam sealant. You will love the way it looks once applied. It has excellent adhesion to building materials, so it can be applied indoors or outdoors.

Application is easy and it dries quickly, suitable for projects that require a quick turnaround. The product is also manufactured in the United States, so you can be sure that it is made with high-quality materials.

Great Stuff caulk for large gaps is tack-free in just six minutes and ready to paint in just thirty minutes. This 20 oz. can provide up to 30 tubes of caulk, making it a great value for your money.

It is stainable and sandable, so it can be easily customized to match the surrounding area. Aside from being waterproof, it is also able to be applied in areas that may be exposed to moisture.


  • Dries quickly.
  • UV rays resist.
  • Great value for your money.
  • Temp range from 60 to 90° F.
  • Sustainable, and sandable.


Can straws may be difficult to fit into valves.


Great Stuff filler is easy to apply, dries quickly, and can be painted in just thirty minutes. The product is also made in the United States, so it is high-quality and resistant to UV rays.

4. Loctite High Density Foam Sealant for Large Gaps

Loctite 22378565 is a handy item to fill in big gaps. The white foam is easy to mold into any shape you desire, and it dries quickly to form a durable seal. This sealant is also waterproof, making it ideal for use in bathrooms and kitchens.

Highlighted Features:

  • Can be easily molded to fit the desired shape.
  • Seals quickly and forms a durable seal.
  • Bonds to most building materials.
  • UV-resistant for long-lasting results.

Loctite High Density Foam Sealant for Large Gaps is an excellent product for filling, sealing, and insulating large gaps and cracks. This sealant is easy to apply and has a solid hold. It is also weather-resistant, so it can be used for both indoor and outdoor applications.

This is a high-density, uniform cell structure product that is perfect for your remodeling needs. It offers durability and insulation, making it the perfect choice for a variety of projects.

Whether you are filling a large gap or need to insulate an area, Loctite caulk is up to the task. In order to be able to withstand the movement of the building and material, the seal has been designed to remain intact. This makes it an excellent choice for a wide range of applications.

It adheres to most surfaces, so it’s perfect for repairing cracks in walls, floors, and other surfaces. As the product dries quickly and is easy to use, you are able to get the job done quickly and easily.


  • Easy to use.
  • Dries quickly.
  • Waterproof.
  • Weather-resistant.


Can straws cannot be replaced.


Caulk from Loctite is fantastic for filling gaps, sealing, and insulating. You can easily apply it, and it has a good hold. The weather-resistant material makes it suitable for indoor as well as outdoor applications.

5. Loctite Insulating Foam Sealant for Gaps & Cracks

This Loctite foam sealant is perfect for filling in large gaps and cracks. It expands to fill the space and then hardens, forming a weather-resistant seal. The foam is also sound-proofing, so it will help to keep your home quiet and energy-efficient.

Highlighted Features:

  • Fills gaps and cracks up to 1″ wide.
  • Cures to form a durable, weather-resistant seal.
  • Great for both DIYers and professional contractors.
  • Bonds well with most building materials.
  • Straw applicator for easy application.

Loctite Insulating Foam Sealant for Gaps & Cracks caulking can effectively fill cracks and gaps up to 1″ wide. The foam expands to fill the space, and the adhesive seals and insulates the area. This is a great product for repairing damage or preventing further wear and tear.

It is a superior flexible sealant that can withstand building and material movement without compromising its seal. This caulk is also easy to apply and can be painted over once it has cured, making it a great choice for both DIYers and professional contractors.

The product is an incredibly versatile product that can be used on a wide variety of materials. Most building materials bond well with it, which makes it ideal for repairing cracks, holes, and other damage.


  • UV resistant.
  • Sound-proofing.
  • Prevent wear and tear.
  • Expands to fill the space.


Wrong use can be a huge mess.

The UV resistance ensures that the caulk will last for a long time, while the straw applicator makes it easy to apply. You can perform quick repairs with Loctite sealant because it dries quickly.


Sealants like Loctite expand to fill a gap and then cure to form a weather-resistant seal. This foam is also soundproof, which will help your home be more energy efficient and quiet.

6. Sikaflex Self-Leveling Sealant for Sealing Large Joints

The Sikaflex Self sealant is a great choice for sealing horizontal expansion joints in concrete. It is polyurethane with an accelerated curing capacity that can handle large gaps. The gray color is perfect for matching most concrete colors.

Highlighted Features:

  • Perfect for sealing concrete expansion joints.
  • Gray color matches most concrete colors.
  • Waterproof and Immersible in water.
  • Weather-resistant and highly durable.

Sika caulk is a premium quality sealant that fills large gaps effectively. It is easy to use because it levels itself and does not require any special tools. In addition, it is waterproof and can be submerged in water, so it can be used in a variety of applications.

Sikaflex Self-Leveling Sealant for Sealing Large Joints is a self-leveling, pourable product that is permanently elastic. It can be painted with oil-based, water-based, and rubber-based paints. It is able to bridge gaps up to 1.5 in. wide, which is ideal for large gaps.

The SIKA caulk is an excellent product for bridging large gaps between concrete or cementitious slabs. As a highly durable and weather-resistant product, it is an ideal choice for applications outdoors since it is highly durable and weather resistant.

Its strong bonding properties make it ideal for repairing cracks and holes in driveways, sidewalks, and balconies. It can also be used to seal warehouses and factories against the elements.


  • Self-leveling.
  • Can handle large gaps.
  • Accelerated curing.
  • Strong bonding properties.


  • A little bit pricey compared with its quantity.


Concrete or cementitious slabs can be sealed with the Sikaflex sealant. Due to its high durability and weather resistance, it is an excellent choice for indoor and outdoor applications.

These all products are a great choice for the best caulking for large gaps. All of them have great features that make them stand out from the rest. Choose the right one for your needs and you’ll be caulking like a pro in a short time.

How to Choose the Best Large Gap Filler?

When it comes to choosing a caulk for large gaps, there are a few things you need to take into account. The following guide will help you choose the right caulk for your needs.

1. Type of Material:

The first thing you need to consider is the type of material you will be using the large gap caulk on. Different materials require different types of caulk.

For example, water-based caulk is best for porous materials like wood, while silicone caulk is best for non-porous materials like glass or metal.

2. Size of the Gap:

The next consideration is the size of the gap you need to fill. Not all caulk is created equal and some are better suited for small gaps while others can handle larger ones.

You should also take into account the width of the bead you need. A wider bead will require more caulk than a thinner one.

3. Location of the Gap:

The location of the gap is also an important factor to consider. Some caulks are better suited for indoor use while others can be used both indoors and outdoors. When choosing an outdoor caulk, make sure it is weather-resistant.

4. Waterproof and Weather-resistant:

If you need a caulk that is waterproof and weather-resistant, then silicone caulk is your best exterior caulk for large gaps. This type of caulk can also be used in areas where there is high humidity.

You can also choose a water-based caulk for these areas, but make sure it is specifically designed for use in high-humidity areas.

5. Additional Features:

When preferring caulk for large gaps, you should also consider any additional features it might have. For example, some caulks come with a built-in primer that makes them easier to apply. Others come with a nozzle that allows you to control the bead size.

Self-leveling caulk is also a great choice for large gaps since it does not require special tools and automatically levels itself.

How to Fill Big Gaps With Caulk?

Filling big gaps with caulk is a simple process that anyone can do. All you need is a caulking gun, some tape, and a few other supplies.

The following guide will show you how to caulk big gaps like a pro.

Step 1: Clean the Gap

The first step is to clean the gap. This will ensure that the caulk adheres properly and does not have any dirt or debris in it.

You can use a vacuum cleaner with a hose attachment to remove any loose dirt and dust. You can also use a damp cloth to wipe away any grease or grime.

Step 2: Apply Tape

After you have cleaned the gap, the next step is to apply tape. This will help you create a clean and straight bead of caulk.

To do this, simply run a strip of tape along both sides of the gap. Make sure that the tape is straight and does not have any wrinkles in it.

Step 3: Cut the Tip

Once you have applied the tape, the next step is to cut the tip of the caulk tube. You want to cut the tip at a 45-degree angle.

The size of the hole will depend on how wide you need your beads to be. For a wider bead, you will need to make a larger hole.

Step 4: Apply Caulk

After you have cut the tip of the caulking tube, it’s time to apply the caulk. To do this, simply point the tube at the gap and squeeze the trigger.

You should hold the tube at a 45-degree angle and move it slowly along the gap. Be sure to apply an even bead of caulk.

Step 5: Let it Dry

After you have applied the caulk, the next step is to let it dry. This usually takes 24 hours, but it can vary depending on the type of caulk you use. Once it is dry, you can remove the tape and enjoy your newly filled gap.

Safety Precautions During Application

Caulking can be a messy job, so it’s important to take some safety precautions.

  • First, be sure to wear gloves to protect your hands from the caulk.
  • Second, be sure to work in a well-ventilated area. Caulk can give off fumes that can be harmful if inhaled.
  • Third, be sure to clean up any caulk that gets on your skin or clothes. Caulk can be difficult to remove, so it’s best to avoid getting it on yourself in the first place.

Now that you know how to fill big gaps with caulk, you can tackle any caulking project like a pro. Just remember to take your time and be careful, and you’ll be sure to get great results.

Frequently Asked Questions

There are several things you should know before you start caulking. Here are some of the most frequently asked questions about caulking.

How Do Caulking Large Gaps around Windows?

The process for caulking huge gaps around windows is the same as for any other type of gap. First, clean the gap and then apply tape to create a straight edge. Next, trim the end of the caulking tube at an angle of 45°, then apply the caulk. Finally, let the caulk dry for 24 hours before removing the tape.

Is It Ok To Caulk Over Caulk?

Yes, you can caulk over old caulk, but it’s not always the best idea. If the old caulk is in good shape and you just want to freshen up the look, go ahead and apply the new caulk over the old. But if the old caulk is damaged or moldy, it’s best to remove it first.

Do You Caulk Between Baseboard and Wall?

Yes. It would be used to fill in the gaps between the baseboard and the wall. This is important because it can help protect against insects and other pests from entering your home. Additionally, it can help to improve the aesthetics of your home by creating a cleaner look.

Do You Paint First or Caulking?

When it comes to caulking, there are many different types of products available on the market. Most caulking can be painted without a primer, but some may require it. Caulk needs to be allowed to dry before painting over it, or the new paint can crack and


Caulking is a great way to fill large and small gaps and cracks around your home. Our provided six best caulk for large gaps can help you select the right type of caulk for your needs. Make sure to follow the instructions carefully and take your time to get a professional-looking result.

You should also follow the proper safety precautions while caulking to avoid any accidents. We hope this guide has been helpful and informative. Good luck with your caulking project.


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