Top 15 Best Exterior Caulks – Products Review In 2021

Every construction works show cracks and gaps after a few years, no matter how premium material you use or how skilled the workers are. To fill up those gaps and cracks, you need to have exterior caulks at your home. Gaps and cracks can be dangerous, and eventually, the entire structure can be compromised. An exterior caulk fills up from cracks instantly and they can withstand severe outdoor conditions. You can use exterior caulks not only for walls and floors but also for windows, doors, pipes, and other objects. Check out the best exterior caulks available online for purchase.

The Best Exterior Caulks In 2021

Last update on 2022-05-03 at 02:36 (UTC+0) / Affiliate links / Images from Amazon Product Advertising API

#1. Big Stretch Caulk

Sashco 10016 10.5oz 10016 Big Stretch Caulk

  Get it now on

By: Sashco

This is a very durable exterior caulk which comes in a size of 310 mm. This can also be used for interior applications and is very effective on baseboards, windows, eaves, doors, and sidings. Moreover, you also use it for soundproofing and crown molding of the walls. This is a very useful product which also comes in other variants. This is definitely one of the best exterior caulk to buy blindly.

Furthermore, this can adhere to any hard siding, and it also lasts for a longer time. The effectiveness of this product can also be applied to the asphalt driveway. This is highly recommended by experienced contractors, and it also dries quickly. This holds the paint very well and will not give any shrinkage. This will not disappoint you when it comes to performance and can also be used on patios.

#2. Crystal Clear Alex Plus Acrylic Latex Caulk Plus Silicone

Dap 18401 Crystal Clear Alex Plus Acrylic Latex Caulk Plus Silicone

  Get it now on

By: Dap

Here is another best exterior caulk manufactured in the USA and is a very useful product. It is crystal clear and is also durable. Moreover, this is mildew resistant and is of premium quality. The caulk is also resistant to moisture and comes in a pack of two. This will provide you with excellent adhesion, and it is also paintable.

The product has a durability guarantee of 35 years and can be cleaned up with water. Furthermore, it is also suitable for interior use, and it has silicone in it. This can be used for various purposes, and it is also highly flexible. The caulk is matte and is non-sanded. You can use it conveniently and is a much-recommended product. This will dry to hard seal and will provide a smooth surface.

#3. Sealants Clear Lexel Adhesive Caulk

Sashco 13010 10.5oz Sashco Sealants Clear Lexel Adhesive Caulk

  Get it now on

By: Sashco

Here is the best exterior caulk which is superelastic and will give you a permanent and long-lasting seal. This is waterproof, and you don’t have to wait. Furthermore, this can even stick to the wet surface and makes your task easier. This is ultra-clear and will not give shades of yellow or clouded shades. Also, if you place it in the garage overnight, this product will not freeze.

Moreover, this product is resistant to mildew and moisture and will ensure that there will be no growth of molds. It does not crack or tear, and you can easily scrub it after application. You can use it in different types of materials as it is soft like rubber and is also tough.

#4. Acrylic Latex Caulk Plus Silicone

Dap 18128 Alex Plus Acrylic Latex Caulk Plus Silicone

  Get it now on

By: Dap

Available in a pack of three, this comes in a superior quality and is resistant to mildew and moisture. This is durable, and you can also use it for interior applications. This is a waterproof seal which can also be cleaned with water. Furthermore, it has silicone in it and is also flexible.

Moreover, this is paintable and will provide excellent adhesion. You can easily apply it to doors, windows, and molds, and the application is made with ease. This will save your time and money as it easily gets away with water when it is in your fingers.

#5. Exact Color Custom Colored Caulk

Sashco Exact Color Custom Colored Caulk - DIY Kit

  Get it now on

By: Sashco

This is a colored exterior caulk which is convenient to use, and you can mix it easily in doing your various tasks. With this, you can match any paint, and it can also be used on metals. This will match the stain and is a perfect sealant. Moreover, this has silicone which makes it very flexible.

This is suitable for all types of moving surfaces and even out the surfaces. Furthermore, it will save your time as it will give you a perfect match. You can create your custom caulk for any kind of project. You will only have to mix it with your paint to get the desired results. All in all, it is clearly one of the best exterior caulks to opt for.

#6. Big Stretch Caulk Slate Gray

Sashco 10026 Big Stretch Caulk Slate Gray

  Get it now on

By: Sashco

Found in multiple colors, this exterior caulk is paintable and is also suitable for interior use. You can clean it easily by just using soap and water. Furthermore, this is water-based and makes your task convenient. This is very elastic and is also durable.

This will not crack or tear and you don’t have to worry about getting pulled away. This will conveniently seal your door and siding and can also be applied for soundproofing your walls. Moreover, this is very easy to apply and will not be hard on your pocket. This will easily adhere to brick surfaces.

#7. Color Matched Caulk

TEC Color Matched Caulk by Colorfast

  Get it now on

By: Colorfast

This is a silicones based exterior caulks which is available in a number of different colors. This is very suitable for standard caulk gun and comes in a tube of 10.3 oz. Furthermore, this is suitable for various applications, and you can even use it indoors.

The caulk stays flexible and is resistant to mold, mildew, and stains. Moreover, this is also UV resistant, and it dries quickly. This is ideal for countertops as well as wall joints and will give them a long-lasting seal. The useful product is highly recommended as it will easily match the color of your substance.

#8. Big Stretch Acrylic Latex High Performance Caulking Sealant

Sashco Big Stretch Acrylic Latex High Performance Caulking Sealant, 10.5 Ounce Cartridge

  Get it now on

By: Sashco

This is one of the most flexible which will give you a long-lasting seal and will not be crack or brittle over time. This is a perfect home improvement sealant which can withstand any movement in your home. Furthermore, this is extremely elastic and will stick easily.

Moreover, it will stretch almost 500 times its original size and is very suitable to give powerful adhesion. Besides, it can go with any type of paint, and it is also waterproof. It is suitable for all types of applications and can be used in a wide variety of surfaces. It will give you professional results without spending anything extra.

#9. Big Stretch Acrylic Latex Caulking Sealant

Sashco Big Stretch Acrylic Latex High Performance Caulking Sealant

  Get it now on

By: Sashco

Available in a size of 29 ounces, this exterior caulk will not crack and is also suitable for indoor usage. This is a high-performance sealant and has the ability to withstand the normal movement of your home. This caulk can stick, bend, compress, and twist. Moreover, this will stretch 500% of its original size, making it a powerful adhesive.

Furthermore, you don’t have to be a pro to apply it. With this, you will not have to do any repairs from time to time, as there will be no cracking. The flexible caulk ensures that your surface does not become brittle. This is a water-based sealant and has more power than a silicone caulk. With such good quality, this is one of the best exterior caulks that you should not overlook.

#10. Conceal Textured Caulk Gold Tone

Conceal 10.5 oz Textured Caulk Gold Tone

  Get it now on

By: Sashco

Another high performance exterior caulks, this one is textured for wood. This is very easy to apply and will provide a natural finish on the roughness of wood. This is elastic and will give powerful adhesion to your wood. Moreover, it will deliver the performance which is hard to see.

The caulk has been lightly textured to blend with your wood. Furthermore, this is also resistant to rainfall for up to four hours, and it is very convenient to clean. You just have to use soap and water to get rid of it, and it is very good when it comes to performance. When compared to other textured caulks, this is very effective which makes it one of the best exterior caulks in our list.

#11. Conceal Textured Wood Caulking

Sashco Conceal Textured Wood Caulking

  Get it now on

By: Sashco

This is a high-performance caulk which is very suitable for wood. The exterior caulks will give you professional results and is also easy to use. This is textured and will easily blend with wood. Moreover, this is UV resistant and is also paintable. It will go with all types of sashco stains and will provide a smooth finish.

Furthermore, the caulk is superelastic and will give powerful adhesion. This is rainfall resistant to 1 – 4 hours and requires water cleanup. The product has low odor and is specifically to be used on woods. This will give you conceal and will stimulate the roughness of wood.

#12. Sanded Caulk Color

C-Cure Sanded Caulk Color Matched by Color Fast

  Get it now on

By: Color Fast

This is a sanded caulk which is very suitable for exterior use. You can also use it conveniently for indoors and can be cleaned with just water. This is a value for money product as with a single tube, you will be able to cover 25 lineal feet. Furthermore, it comes in a siliconized acrylic latex formula which is simply to have.

The rough caulk is very suitable for wall joints, and it meets the standard of ASTM C834. Moreover, this product is mildew, UV, and moisture resistant. It dries in an hour and is effective for low moisture setting. It has to be used with a chalk gun and is also suitable for shower tile joints. That makes it one of the best exterior caulks to consider.

#13. Big Stretch Acrylic Latex Caulking Sealant

Sashco Big Stretch Acrylic Latex High Performance Caulking Sealant

  Get it now on

By: Sashco

If you are looking for exterior caulks which are highly stretchable, then this is the one you are looking for. This is highly recommended for sealing your windows, doors, and sidings, and it will not crack. The high-performance caulk comes in a cartridge of 9 ounces and is a perfect sealant. Moreover, this has acrylic latex which will not crack or become brittle.

This will give powerful adhesion and is also waterproof. Furthermore, this will provide you with permanent results and will easily stick or compress. This is easy to use and does not freeze. This will stretch above 500% when compared to its original size.

#14. White Latex Caulk

Dap #18250 10.1OZ White Latex Caulk

  Get it now on

By: Dap

This is a white latex caulk which is high in performance and is also economical. The product comes with a durability guarantee of seven years. This is suitable for your masonry tasks and will adhere to wood and metal. Moreover, it is very effective in keeping moisture, air, and dust.

Ideal for general caulking purposes, you can use it easily and can also be applied indoors. Furthermore, it dries quickly and has low odor. This will give a perfect mold and will go well with your concoction. This is inexpensive and will deliver professional results. The product is paintable and comes in a size of 10.1 oz. That makes it one of the best exterior caulks to have at home.

#15. Caulk Matched to Custom Building Products

Color Fast Caulk Matched to Custom Building Products

  Get it now on

By: Color Fast

This exterior caulk comes in many variants, and you can pick the one according to your mixture. Furthermore, this is also ideal for internal applications and is easy to clean up. This will match your custom building products and is based on siliconized acrylic latex formula.

Moreover, the caulk is economical as a single tube will cover approximately 25 lineal feet. This is a highly recommended product for wall joints and floor and is resistant to mildew and moisture. The caulk can also resist UV and meets the standards of ASTM C834. It just requires an hour to dry up and will fully cure the low moisture setting within 4 days.

Types Of Exterior Caulks & How To Use Them

There are many types of caulks, and exterior caulks is a great specialty caulk for outdoor trim work. This guide will show you common types of exterior caulks along with how to use them. Let’s find out and see what they are with us below.


Exterior caulks come with different types for various using purposes which are:

  • Exterior Acrylic Caulk: is water-based and versatile, and it is easy to apply and clean up. You can use it on exterior cracks and gaps that are narrower than 0.25 inches. It fits on a variety of surfaces, and it works best in dry temperatures above 40 degrees.
  • Exterior Butyl Rubber Caulk: is flexible which is great at sealing joints with a lot of movement. This type is waterproof, and it is very effective at sealing water in and out which is ideal for gutters and even chimneys.
  • Exterior Latex Caulk: is water-based which popular among painting contractors. This type easy to apply, and exterior painting contractors can paint over them with ease. It is durable and long-lasting, and it is effective for filling in wood siding and small gaps in windows.
  • Exterior Modified Silicone Polymer Caulk: comes with the combination of water-based caulks. It is ideal for wood siding, vinyl, aluminum, and fiber cement. You can use it to seal gaps around doors, windows, and vents, and it is very flexible.
  • Exterior Polyurethane Caulk: is all-purpose outdoor caulking. You can apply it pretty much anywhere and on any material outside, and you can also paint over it. It is great at filling large openings and gaps, and it is also ideal for insulation.
  • Exterior Silicone Caulk: is flexible which is great at adhering to tile, metal, glass, and other smooth materials. It prevents mildew and mold, but you cannot paint over it. This type can be quite challenging to apply, but it is extremely durable with a long-lasting result.

How To Use Exterior Caulks

Once you know which type is perfect for your need, you also know how to use them as well. There are some steps to follow which are:

  • Start loading the caulk to the gun by using your thumb to press release on the rear of the gun. Then, pull the plunger all the way back before slipping the cartridge into the gun and push the plunger in. You can take your thumb off the release after this.
  • Cut the end of the nozzle on the cartridge, so the opening matches the size of the gap you’re sealing. After use, you can use a screwdriver or length of stiff wire to puncture any inner seal in the cartridge.
  • Place the nozzle at a 45 degrees angle to the seam that you want to seal. Gently squeeze the handle of the caulk gun and draw the gun backward. Slowly and steadily do it for smooth and even flow.
  • When it cures, it will shrink slightly and form a concave seal. So you won’t have to flatten or shape the bead of caulk to get it to look concave at all.


Filling up cracks at the right time can prevent severe damage and repair works. You can also point over the exterior caulks after applying to make it invisible. In fact, the construction workers use it during construction to fill up the gaps they might have left by mistake. There are different types of exterior caulks available for different applications. Go through the description of these best exterior caulks properly before purchasing.

Leave a Comment