Baseboards and trims can add a lovely finishing touch to your home, but minor cracks and unsightly crevices can put a dent in their elegance.

Thankfully, the best caulk for trim and baseboard is all you need to fix those dents and return your home to its glorious look.

If you do not know how to find such calking material, you have come to the right place. This article provides a detailed rundown of the best caulking products for trim and baseboard based on our latest tests and user reviews. 

You will also find a detailed user guide towards the end of the article to help you buy the best pick for your project.

Our Top Picks

Best Caulk For Trim and Baseboard

  1. Dap Alex Plus Acrylic Latex CaulkBest caulk for interior trim
  2. Sashco Big Stretch CaulkBest caulk for baseboards
  3. GE Sealants & Adhesives Silicone CaulkBest white caulk for wood trim
  4. DAP Dynaflex 230 Premium CaulkBest caulk for trim that won’t crack
  5. DAP Kwik SealBest caulk for crown molding
  6. GE Max Shield Painter’s CaulkBest paintable caulk for trim
  7. Flex Shot Rubber Adhesive Sealant CaulkBest caulk for bathroom baseboards

Best Caulk for Wood Trim and Baseboard Reviews

This section provides detailed reviews of the best products for sealing cracks and dents in baseboards and trims. You will learn about the various qualities that make these products the very best and how they can benefit your home.

1. Best caulk for interior trim – Dap Alex Plus Acrylic Latex Caulk

Dap 18128 Alex Plus Acrylic Latex Caulk Plus Silicone 5.5-Ounce
  • All purpose acrylic latex caulk plus silicone is highly flexible, durable, and creates a long lasting waterproof seal
  • Alex Plus has strong multi-surface adhesion and won't shine through or discolor paint
  • Cured caulk is mold & mildew resistant
  • Acrylic latex sealant is low in odor and cleans up easy with water
  • Paintable in just 30 minutes

DAP’s Alex Plus is a fast-drying formula that can save you a lot of time off your project. If you are pressed for time, this premium-quality sealant from Dap may be your best choice. 

It dries within minutes and becomes ready for painting in just half an hour. As you may have noticed, this baseboard caulk is paintable.

That means it allows you to match it to the rest of your décor with a coat of paint, so the patched section does not stick out. No wonder it’s the best interior trim caulk.

The acrylic latex formula features added silicone to make it more flexible and longer-lasting than standard acrylic caulk. The silicone in this formula does an excellent job of preventing the sealant from cracking over time.

Despite these premium features, this caulk remains among the moderately priced options in the market. So it helps you afford premium quality without breaking the budget.

What We Liked Most

  • The caulk boasts a whopping 35 years of durability guarantee
  • It is paintable and dries pretty quickly within 30 minutes of application.
  • It has low odor and VOC, so you can use it without wearing sophisticated breathing equipment. 
  • The product cleans up easily with soap and water.
  • The caulk works for both indoor and outdoor projects 

What Could Be Improved

  • This caulk lacks mold and mildew resistance; it may be best to ensure you paint over it if used in humid areas. 
  • It may also yellow over time.

2. Best caulk for baseboards – Sashco Big Stretch Caulk

Sashco Big Stretch Acrylic Latex High Performance Caulking Sealant, 10.5 oz Cartridge, Clear
  • FLEXIBLE CAULK – Helps you avoid repeated repairs because it won’t become brittle or cracked over time
  • HOME IMPROVEMENT SEALANT – Professional results and the perfect solution for caulking that withstands a home’s natural movement
  • PERMANENT AND WATERPROOF SEALANT – Keeps the weather outside where it belongs, permanently
  • BIG STRETCH CAULK - Powerful adhesion and extreme elasticity makes this caulk stick, twist, bend, compress, and stretch to more than 500% of original size!
  • PAINTABLE SEALANT – Paint adheres to this acrylic caulk like a pro, so paint your surface whatever color you love and keep your sealant looking aesthetically pleasing

What kind of caulk for baseboards, you ask? Well, if your baseboards have sustained large cracks that keep getting wider, this caulk sealant can be a godsend for you.

As the name suggests, this caulking for baseboards dries to form a stretchy material that remains unaffected by changes in temperature or physical pressure. 

It will naturally stretch out to hold the seal in place, creating a durable and dependable seal for the baseboards. This quality can help you avoid repeating the same repairs over time.

Sascha Big Stretch exceptionally resists cracking while stretching up to 500 percent of its original size. This acrylic latex caulk is ideal for those patches that keep coming off after sealing them with standard materials. 

This caulking for baseboards is formulated for indoor and outdoor use, so exposure to the elements will not affect its longevity.

What We Liked Most

  • Thanks to its stretchy quality, this elastomeric sealant can seal gaps as large as 2 inches wide. 
  • The sealant is waterproof, protecting wooden baseboards from water damage.
  • It can prevent the onset of molds and mildew 

What Could Be Improved

  • This caulk takes several hours to dry. Therefore, if you want to paint over it, you will have to wait 48 hours for it to be ready for painting.

3. Best white caulk for wood trim – GE Sealants & Adhesives Advanced Silicone Caulk

GE Sealants & Adhesives Advanced Silicone 2 Window & Door Sealant, 10.1oz, White
  • This product is highly durable
  • The product is manufactured in United States
  • The product is easy to use

This advanced silicone caulk is among the most durable sealants on the market today. Thanks to its 100-percent silicone formula. 

The product is waterproof, making it ideal for use on wood to protect it from water damage and discoloration from molds and mildew. 

If you have baseboards in areas that frequently get wet or experience high humidity, GE sealant & adhesive advanced silicone caulk may be ideal. 

It boasts a fast-drying formula that can save you a lot of hassle. Once applied, the product takes only 30 minutes for its waterproof quality to kick in. You can use it on exterior trim during rainy seasons without problems. 

Since it’s made of 100 percent silicone, the caulk remains stretchy when dry. This characteristic makes the GE sealant resilient to weather changes and can last for many years unaffected.

What We Liked Most

  • This caulk is easy to use 
  • It provides 100-percent waterproofing
  • It is the most durable of its kind, creating a permanent seal on wooden trim
  • The white color should match your white trim seamlessly without sticking out

What Could Be Improved

  • Some customers claim the product is not easy to use and can be messy

4. Best caulk for trim that won’t crack – DAP Dynaflex 230 Premium Elastomeric Caulk

DAP DYNAFLEX 230 Premium Elastomeric Interior and Exterior Sealant
  • Delivers a "Silicone Tough" latex formulation for outstanding exterior performance against the elements.
  • Developed for flexibility and crack proof performance, this sealant endures expansion and contraction without cracking or losing its seal
  • 100% Waterproof 2 Hour Paint Ready
  • It has excellent adhesion to a wide range of building materials including wood, MDF, PVC, polystyrene, and composite trim board.
  • Meets ASTM Specification C920, Class 25.

If you need something that will never crack, this Dynaflex caulk may be ideal. The caulk is specifically formulated to resist cracking, making it perfect for places that experience a lot of movement. 

This caulk for outdoor wood can also be used in places that experience extreme and rapid temperature changes and will not crack. Thanks to the tough silicone in its formula.  

The caulk is completely waterproof, so you can use it on wooden trim to protect the wood from water damage. It is also paintable and requires only two hours of dry time to be ready for painting. 

The Dynaflex is formulated for utmost versatility. It adheres to various materials, including MDF, wood, polystyrene, composite, and MDF. As such, it will work for your trim regardless of the material. 

Perhaps the only limitation of this caulk is how challenging it is to use. Being made entirely of silicone, you must squeeze the tube with a significant amount of force to get the caulk out. Some users damage the tube in the process.

What We Liked Most

  • This DAM caulk is paintable in just two hours after application  
  • It dries relatively fast 
  • It is fairly easy to apply
  • It is 100-percent waterproof

What Could Be Improved

  • It has a perceptible chemical odor 

5. Best caulk for crown molding – DAP Kwik Seal

DAP 18001 Kwik Seal White 6Oz
  • Flexible, paintable, all-purpose caulk professionals trust for an easy to apply, long-lasting seal
  • Flexible tub and tile caulk
  • White

Here is another uniquely formulated acrylic latex caulk that creates a 100-percent waterproof seal on your crown molding. 

It has silicone added to its formula, making it highly flexible and durable. Once applied, it maintains its seal without becoming brittle over time. 

The caulk is paintable, so you can match it to the surrounding surfaces and mesh seamlessly with the rest of your interior décor. 

However, we do not consider it a fast-drying formula. Even though the manufacturer claims that the caulk dries quickly, our test results suggested otherwise. 

Still, it is significantly easy to apply and will not require expert skills to achieve professional-looking results with this sealant. 

The caulk dries to form a mold d mildew-resistant seal. This can help protect your crown molding from discoloration.

What We Liked Most

  • Thanks to the silicone added to its formula, the product is flexible when dry
  • It is paintable, making it easy to match the surrounding surfaces 
  • It is significantly easy to apply compared to pure silicone caulking products
  • It resists molds and mildew excellently 
  • It cleans easily with water 
  • The best caulk for trim molding
  • The caulk is low-VOC and has low odor, making it easier for odor-sensitive persons to use it

What Could Be Improved

  • The product is formulated for indoor use only. Therefore, it is not suitable for use on exterior projects

6. Best paintable caulk for trim – GE Max Shield Painter’s Caulk

GE Max Shield Painter's Seal & Paint White, 10.1 fl oz, 1, Cartridge
  • Paintable: Paint-ready in 30 minutes and compatible with most latex- and oil-based paints; ideal for molding, trim, baseboards, and doors
  • Durable: 100% waterproof and backed by a 60-year limited durability guarantee for long-lasting and dependable results
  • Extremely Flexible: Stretches over 600% and seals up to 3-inch gaps with 25% joint movement; remains shrink- and crack-proof
  • Mold and Mildew Resistant: Includes lifetime mold-free product protection to defend against stain-causing mold and mildew growth
  • Easy to Use: Guns out effortlessly and tools smoothly onto common building materials, while providing long-lasting performance

The Max Shield from GE is specifically formulated to accept most paints for baseboard and trims, such as oil-based and latex paints, so you are not limited in terms of the paint you can apply over this sealant. 

The caulk is highly flexible, sealing gaps as wide as 3 inches. It dries to form a strong bond allowing for joint movement of up to 25 percent without cracking or affecting the seal.

This makes the painter’s caulk ideal for sealing large gaps in trims and baseboards. In addition, this product stretches more than 600 percent of its original size, thanks to its advanced polymer acrylic latex formula.

This stretchy quality means the sealer will not become brittle over time. This is one reason making it among the most durable caulks on the market. 

The manufacturer is so confident in the product that they back it up with an incredible 60 years of durability guarantee.

What We Liked Most

  • This sealant is paintable, allowing you to match the patched areas with the rest of the décor. 
  • It becomes paint-ready in just half an hour, which is the quickest any caulk can become ready for painting
  • The caulk is completely waterproof 
  • It is stretchy and highly durable
  • The best interior paintable caulk
  • The caulk is relatively easy to use due to its flexible and well-thought-out acrylic latex formulation
  • It offers superior resistance to molds and mildew

What Could Be Improved

  • The product is expensive

7. Best caulk for bathroom baseboards – Flex Shot Rubber Adhesive Sealant Caulk

Flex Shot Rubber Adhesive Sealant Caulk, 8-oz, Almond (Mildew Resistant)
  • Caulks, bonds and seals virtually everything!
  • No need for a caulking gun! The free extension tube makes even hard-to-reach repairs easy
  • Gives you a perfect bead, every time. No running, no dripping, no mess
  • Expands and contracts to fill in huge cracks and holes
  • No waste – use it again and again

Flex Shot is designed for easy application. You do not need a caulking gun to use this product, which makes it suitable for those who do not enjoy using or prefer not to use caulking guns.

It comes with a free extension tube designed to make it easy to apply to those hard-to-reach areas of your project. It is extremely versatile and adheres to virtually any surface.

So it won’t matter what your trim and baseboards are made of; the caulk will stick and form a long-lasting bond. The product beads perfectly every time without the problem of dripping or a running mess. 

It remains flexible when cured, allowing it to fill big gaps and remain firmly in place despite significant joint movement. Flex Shot comes in a wide range of colors to match your trim and baseboard color.

If you prefer a different color than the options offered, you can simply paint over it. The rubber adhesive is paintable to blend seamlessly with any décor.

What We Liked Most

  • This product is easy to apply without the need for a caulking gun. 
  • It is flexible, allowing for joint movement without affecting the bond 
  • It boasts strong adhesion 
  • The tube features an easy-to-use nozzle

What Could Be Improved

  • It has an odor that some people may find unpleasant

Best Caulk For Trim and Baseboards Comparison Table

Education: What Caulking to Use for Baseboards and Trims

With a shortlist of the best caulking products at hand, you remain with the task of picking the final choice to use on your project.

In this case, you must know what to look for in the list of products to determine the one that best suits your needs.

Baseboard & Trim Caulk Type

The type of caulk for baseboard determines how effective the seal will be. Ideally, you need to understand the available caulk types and their characteristics to understand what might work better for your trim and why. 

Here is a quick rundown of the caulk types available on the market. 

Acrylic latex caulk  

This type of caulk is the least durable and most inexpensive. It stretches the least, so it is often designed for interior projects where the temperatures are relatively consistent throughout.

Its limited flexibility makes it prone to cracking and may require reapplication soon. Acrylic latex caulk cleans up easily with soap and water; it is user-friendly and easy to work into gaps.

It also accepts paint easily and boats superior resistance to the sun’s ultraviolet radiation. You can use acrylic latex sealant on interior trim, to caulk baseboards, molding, and other indoor wood projects as a filling material.  

Elastomeric caulk sealant 

As opposed to the acrylic latex caulk above, an elastomeric sealant is incredibly flexible, making it ideal for sealing joints that experience a lot of movement. 

It is a high-quality caulking product often used for both interior and exterior caulking jobs. They also contain special formulations that make them paintable, just like acrylic latex, but they tend to be relatively more durable.

Elastomeric caulks are also easy to clean and boast excellent adhesive qualities.

Silicone-acrylic latex caulk  

Most of the best caulking products for baseboards and trims are acrylic latex caulks with silicone added to increase their flexibility.

This special formulation creates strong caulks that work excellently in indoor and outdoor environments. They can also seal large gaps and tolerate significant joint movement without affecting their seal quality. 

While silicone typically does not accept paint too well, the acrylic latex material in this formulation makes these caulks paintable. Thus, they provide the best of both worlds. 

Advanced polymer acrylic latex caulk 

This type of caulk for baseboards is often graded for interior and exterior applications. It resembles the silicone-acrylic latex caulk sealant above in that it comprises acrylic latex with polymers added for flexibility. 

Advanced polymer acrylic latex caulk is the best type for filling and mending large gaps in trim and baseboard. This type of caulk seals holes and cracks excellently and can tolerate incredible joint movement without getting damaged.

Factors to Consider In Choosing the Best Caulk for Trim and Baseboard

If you’re like me, you take great pride in making your home look its best. From painting the walls to installing new trim and baseboard, there’s just something about a well-manicured home that is both inviting and satisfying.

But even the most meticulous homeowner can run into trouble when choosing the best caulking for trim and baseboard. With so many different types and brands of caulking on the market, how can you be sure you’re picking the right one?

Fortunately, I’ll share with you some factors to consider when choosing the right sealant for baseboards and trim.

Recommended type for your project 

We recommend the advanced polymer acrylic latex type for a project involving large gaps. It will do an amazing job creating a permanent bond that does not give in to the gap size or joint movement.

It is also weatherproof, making it the ideal choice if your trim is located outdoors. Otherwise, you can always go for acrylic latex caulk with silicone added to the formula for interior baseboard and trim jobs.

This will offer nearly as much flexibility as the advanced polymer type but at almost a third of the price. However, ensure the project is not located in a place with high humidity or excessive water problems, such as the bathroom.

The silicone-acrylic latex caulk does not hold up too well to excessive water exposure. Such moisture-prone areas are best left to butyl Rubber caulk and other waterproof sealants.

If you are on a budget, you might have to work with acrylic latex caulk because it is the cheapest type. However, ensure you are strictly sealing smaller gaps and joints with minimal movement.

This caul type is not stretchy and easily cracks under pressure or due to joint movement. 

Drying time

You may be most interested in the drying time of your caulk if you are pressed for time. While some caulks will dry in 30 minutes and be ready for painting in an hour or so, others can take up to 48 hours to be paint-ready.

The paint will not adhere to the caulk if you apply it before it is ready. So, always check the paint-ready time indicated on the product you want to buy and ensure it is aligned with your needs.   

You may also want to check the cure time if your project is outdoors. You don’t want it to rain heavily on the caulk before it is cured, as that can dent the caulk and reduce its durability.


This is the measure of how long the caulk will last. A durable sealant will mean a more permanent seal, while a less durable one may force you into repeated repairs. 

Manufacturers often assign a durability rating to their products, during which you should be entitled to a refund if the sealant fails to perform as stipulated.

While this refund may be unattainable, the rating should be a good pointer to the product that will likely last longer. 

Ability to paint over it

Most trims and baseboards are painted. While some caulks come in colors that are commonly used in these applications, the range is always limited. If you do not want the patched areas of your trim and baseboard to stick out, we recommend going for paintable caulk. 

This means steering clear of 100-percent silicone products. These are generally stretchy but not paintable. So they may not work for your needs, which is why we have not recommended them for trim and baseboard applications in this guide. 


As we mentioned before, acrylic latex caulk is the least flexible, with their advanced polymer blends being the most flexible and durable. 

Flexibility is a big factor for outdoor projects that experience rapid temperature changes. You also need a flexible caulk when filling gaps and cracks that may experience some movement. 

Flexible options like elastomeric caulk, silicone-acrylic latex caulk, and advanced polymer blends can withstand a lot of joint movement without breaking their seal. 

It is also a factor when sealing wooden materials. Changes in indoor temperature and humidity often cause wood to swell and constrict, both of which will require a sealant that can expand and contract with the wood. 

Size of the gap to fill

Different caulking products are rated for different gap sizes. Always check the rating against the size of the gap you intend to fill. That is the only way to guarantee professional-looking results. 

Any of the various types of caulk can work for small gaps. However, if you are filling a particularly large gap, an advanced polymer acrylic latex caulk may be the best choice. 

For instance, using acrylic latex caulk or elastomeric sealant on a 3-inch gap will not work as expected. Caulking products formulated for filling larger gaps tend to be more viscous to provide the required structural support. 

Water resistance 

You are more likely to need a waterproof caulk when sealing gaps on exterior trim than indoor baseboards. In these areas, you want a waterproof product that is also significantly elastic. 

The outdoor weather experiences rapid temperature changes other than rain and precipitation. So waterproof with no elasticity will not help. 

Basements and bathrooms are equally notorious for high humidity and water issues, so projects located in these areas will require a waterproof product. 

You may find that a 100-percent waterproof product costs more than a water-resistant option. In such cases, it would be best to go for the waterproof caulk only if the project requires that quality. 

For any interior molding, baseboards, or trim located away from water, you can always get away with cheaper sealants with no waterproofing quality, but that gets the job done anyways. 

Mold Resistance 

Molds and mildew go hand in hand with water and moisture. For exterior molding and trim, you can expect the material to experience precipitation and rain from time depending on the weather in your location.

This means you must use a mold-resistant caulk to be safe. The same rule applies when caulking baseboards or trim in the bathroom or humid basement. Otherwise, you can use any caulking if humidity and moisture are nonissues. 

Caulk tube size 

Caulks typically come in smaller squeeze tubes and larger cartridge tubes. You will intuitively want to buy a tiny squeeze tube if you are sealing a superficial crack in your trim or baseboard. 

However, a larger tube comes in handy when the project involves sealing multiple cracks or gaps or large holes in the baseboard. The larger the project, the more the product you will need.

Of course, this may sound obvious, but you may be tempted to buy several small squeeze tubes for a large project or to seal multiple gaps. Unfortunately, this approach is not the best because you may spend more money in the process. 

It is often advisable to buy bulky pieces for larger projects. That way, you get more of the product at lower costs. These considerations are not without exceptions.

For instance, if the baseboard you are fixing is located in an area that is hard to reach, a smaller squeeze tube may be a better pick. Check to ensure the caulking gun will fit in the area before deciding which way to go. 

If the space is too small for the caulk gun to fit, your only option is to use a squeeze tube that is easier to maneuver. 


What caulk to use for trim? 

It is best to use latex caulk for interior trim. The interior grade latex caulk is inexpensive, paintable, fast-drying, and easy to clean with water and soap. You may consider a white caulk for a corresponding white trim to save you the extra task of painting the patched area. However, you can go with clear if the trim is not white.  

What caulk to use for baseboards?

Acrylic latex is the type of caulk to use on baseboards as long as they are not located in bathrooms or kitchens. Consider using a waterproof caulk instead for these water and moisture-prone areas, such as the kitchen and bathrooms. Waterproof caulks like silicone-acrylic, or advanced polymer acrylic latex caulk are ideal for outdoor applications and baseboards located in areas of the house that are likely to experience water and humidity problems.   

When to use clear or white caulk for baseboards?

Use white caulk to seal woodwork, baseboards, and roofing. On the other hand, use clear caulk in kitchen sink gaps or showers to seal the spaces between tiles.

Caulks are only as good as the manner in which they are used. Correctly choosing can help you achieve better results. 

What is the best caulk for filling cracks?

The best caulk for filling cracks is urethane caulk. Depending on the location and size of the cracks, these polymer-based caulks may be the best to offer the required structural support, adhesion, and flexibility that guarantees longevity. 

Can you use silicone for baseboards?

Yes, you can use silicone for baseboards. In fact, latex silicone falls in one of the categories of the best caulks for baseboards. Silicone caulking is a good option because it’s flexible and waterproof. It’s also paintable, so you can match the color of your baseboard trim.

What is the best caulk for interior window trim?

Acrylic caulk is the best for interior window trim. This caulk type is designed to provide a good seal without discoloring the trim or making it difficult to paint over. Acrylic caulk also dries quickly, meaning you won’t have to wait long before painting or staining your window trim.

What is the best flexible caulk?

Synthetic rubber is the best flexible caulk. It has a long lifespan, is resistant to weather and temperature changes, and can be applied in various circumstances. It is also less likely to shrink or crack over time.

Recommended Reading: Best Paint Brush for Trim and Baseboards

Final thoughts on the best caulking for baseboards and trim 

Numerous factors will determine the best baseboard caulk.

Once you understand your project and personal needs, you can review the considerations as detailed in this write-up and then use them to guide you in choosing the best choice from the products we have reviewed. 

We hope this in-depth buyer guide and product reviews help you find the right caulk for your caulking needs. 

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