Best Caulk for Baseboards: Bid Farewell to Gaps (Revised for 2021)

Caulk sealants are a repair necessity and with a quick coating of caulk, you can make your baseboards look like new again, or if you have a new home, it can keep them looking new longer.  The best caulks for baseboards efficiently remove any defects and close up the gaps between the baseboard and the floor or the walls. Many also have anti-mildew or anti-mold agents to keep your baseboards sparkling which can be especially helpful in high moisture areas like a bathroom or the laundry room.

With the wide variety of caulks available though, finding the best one for baseboards can be an exercise in trial and error.  Many factors go into what caulk will work best for your home and we have seen multiple instances of wrongly advertised products. That’s why our team at Valid Pick developed this comprehensive guide and reviews of the top caulks to make it easier for you to find the best caulk for your baseboards.

Comparing the Best Caulk for Baseboards

Best Caulk for Baseboards

Preview
Our Pick
Gorilla 8060002 100% Silicone Sealant, 10 oz, White, 1-Pack
Best Paintable Caulk
Red Devil 0777 Lifetime Ultra Premium Elastomeric Acrylic Latex...
Large Jobs with Wide Gaps to Fill
Sashco Big Stretch Acrylic Latex High Performance Caulking...
Mildew and Mold Resistant
Fast Drying
Paintable
Customer Rating
-
-
Price
$8.99
$15.00
$67.99
Our Pick
Preview
Gorilla 8060002 100% Silicone Sealant, 10 oz, White, 1-Pack
Mildew and Mold Resistant
Fast Drying
Paintable
Customer Rating
-
Price
$8.99
Best Paintable Caulk
Preview
Red Devil 0777 Lifetime Ultra Premium Elastomeric Acrylic Latex...
Mildew and Mold Resistant
Fast Drying
Paintable
Customer Rating
Price
$15.00
Large Jobs with Wide Gaps to Fill
Preview
Sashco Big Stretch Acrylic Latex High Performance Caulking...
Mildew and Mold Resistant
Fast Drying
Paintable
Customer Rating
-
Price
$67.99

 

 

Our Pick: Gorilla Silicone Sealant Caulk – Best combination of features at a reasonable price

Gorilla White Silicone Caulk

VIEW ON AMAZON

Gorilla White Silicone Sealant is a 100% silicone based caulk which can be used in all rooms in your home including kitchens and baths since it is 100% waterproof and it’s formula is mold and mildew resistant.  It also has the benefit of being fast drying so it will be waterproof in 30 minutes meaning you won’t need to wait long to use a room in your house including those with high moisture content like a bathroom or laundry room.   Gorilla brand also claims it won’t yellow, shrink or crack and from our research it does appear the company can make this claim as there were no issues reported.  Since it’s 100% waterproof is also has the benefit of being able to be used outside so it can double as a caulk for any outdoor projects you have, such as around doors or windows.  Gorilla brand is well known for its glues, tape and adhesives and it’s sealants receive similar positive feedback from customers.  One drawback is you wont be able to paint the sealant since it’s a true silicone sealant.  This may not be a deal breaker for you, but just know the caulk will remain white.  (Gorilla brand does offer a clear version of their 100% silicone sealant though, if you’d prefer to have have the caulk blend into the baseboard and wall or tile.)

Pros
  • 100% silicone sealant
  • Fast drying – water ready in 30 minutes
  • Mold and mildew resistant and 100% waterproof
  • All weather so it can be used outdoors as well
Cons
  • Can’t be painted

 

Best Alternatives

Red Devil Ultra 230 Premium Acrylic Latex Sealant

VIEW ON AMAZON

While our pick of Gorilla brand caulk offers a lot of benefits, it can’t be painted so if you want a caulk with offers great quality, can be painted, and will hold up for the life of your home, we recommend Red Devil’s Ultra 230.  Unlike the Gorilla brand which is a silicone base, Red Devil’s Ultra 230 is an acrylic latex base which means it can be painted over.   Like the Gorilla brand, Red Devil Ultra 230 is waterproof meaning it can be used indoor and outdoors, and it does have mold and mildew resistance, making it a great choice for high moisture areas.  The one drawback is its not fast drying and Red Devil recommends you wait 3 days before getting it wet due to its long cure time.

Pros
  • Paintable
  • Mold and mildew resistant and 100% waterproof
  • All weather so it can be used outdoors as well
Cons
  • Not fast drying

 

 

Sashco Big Stretch Acrylic Latex Caulking Sealant

Sashco Big Stretch Caulk

VIEW ON AMAZON

The product by Sashco lives up to its name and provides you with a caulk that can stretch and cover large gaps – even those up to 2 inches wide. This earns it a spot among the best caulk for baseboards, given how it can cover up even wide gaps between your baseboards and walls, or floor that may have occurred over time due to settling.  Another advantage is this caulk’s ability to stretch over time (hence it’s name Big Stretch).  This would be particularly helpful is you are planning to use larger size moldings since the larger the molding, the greater likelihood that gaps will appear over time as the moisture which is present in brand new moldings releases over time.  Sashco claims that Big Stretch can stretch to up to 500% of it’s original size and the company does have plenty of examples to back up their claim.  Since it’s an acrylic latex caulk, it can be painted over as well which is particularly helpful if you have a coloring scheme to match up with your baseboard. Unfortunately while Sascho Big Stretch can be painted over with ease, it doesn’t have anti-mildew or mold resistance in it’s formula, so if you plan to use it in a high moisture area like a bathroom with a steamy shower, just be aware that over time you’ll want to periodically check to make sure the caulk remains clean and free from mold.  One other thing you’ll want to consider is that Big Stretch is sold in a 12 pack, not individually.  So while it’s actually a good deal on a price per ounce basis compared to other caulks, you’ll probably want to only pick it if you have a large project like caulking all of the baseboards in a new home where you’ll need multiple tubes of caulk.

Pros
  • Can span gaps up to 2 inches wide and stretches over time so gaps won’t appear
  • Paintable
  • 30-40% less expensive than many other caulks on an ounce basis so very economical for larger jobs
Cons
  • No anti-mold or mildew properties
  • Only sold in a 12 pack so more expensive than other caulks if you only need one or two tubes

 

 

Things To Consider Before Buying

Best Caulk for Baseboards Buying Guide

Now that you know the pros and cons of each of our picks for the best caulks for baseboards, you may still be debating which one is right for you.  Here's a helpful guide on what to consider:

Acrylic latex caulk vs silicone

silicone caulk for baseboards

The most important aspect when buying a caulk comes down to the base material. Most household caulks are either acrylic latex, silicone, or a combination of the two.

Acrylic latex caulk can handy for areas that would not be exposed to water. The caulk is usually much cheaper than silicone and is easy to paint over, so it can be a good choice if you plan to use it in a room with lower humidity and you want to paint over it.

If you want to work in humid areas like a bathroom, but do not want to lose out on the paintability, then you’re best going for an acrylic latex caulk with silicone added into it. This caulk can resist mild water contact, and be painted.

If you want a caulk that would work on surfaces that are consistently in contact with water, then you are best off going for silicone caulk. These are very durable and can resist water with ease. However, they cannot be painted and are typically more expensive.

Ultimately, each type of caulk has some tradeoffs, and it comes down to your needs, on which one will be best.  However, if you will be using your caulk on your sink and other such areas as well, and do not mind being unable to paint it, then a silicone-based caulk will serve you the best.

Quality and durability

A caulk is meant to last a long time and seal up holes or gaps for you. That means that any form of compromise on quality is not acceptable, and you should only get the higher quality caulk, even if they charge a little more.

For durability, you should aim for at least 20 years from the acrylic latex caulk and 35 years from silicone caulk. Anything below that is simply not competitive, and you can easily find better caulk in the market.  Each of the three caulks we recommend met our standards for durability and long life.

Mold and mildew resistance

If your home has previously displayed trouble with mold and mildew, then you might want to consider getting a caulk that is mold and mildew resistant.

These are typically more expensive, but don’t yellow and ensure that your baseboards do not get attacked by mold and mildew.

Curing time

Curing time is the time that it takes for caulk to fully settle and dry. This can range from a single hour to over 2 days!

If you have pets or kids that might touch the caulk, then you should ideally search for lower curing times. It’s a hassle to sit and watch a caulk to ensure that nobody ends up touching it.

Otherwise, curing times can be a secondary concern since you can simply let the caulk dry on its own without needing to check up on it.

Color and paintability

Most caulks come in white or clear, although several offer other colors as well.  Ultimately though this is a personal decision on whether you want to paint over the caulk so it's not noticed or if you're ok with it as is.  As mentioned earlier, 100% silicone caulks can't be painted, while latex can be painted over.

Elastomeric

Most types of caulk are now elastomeric. This means that they can stretch and bend. Some models such as Sashco's Big Stretch are great at stretching and can stretch up to 500%. These can make them perfect for your needs if you need to fill up large gaps.

Price

No matter if you pick a 100% silicone caulk or a latex caulk (or a combination), you should be able to find a great quality caulk for less than a dollar per ounce and all of our picks for the best caulk for baseboards are less than a dollar per ounce.

Frequently Asked Questions

How to caulk baseboards?
Step 1: Clean the baseboard. You should remove any dirt and clean out any existing caulk.

Step 2: Apply tape to areas you don’t want your caulk spreading onto.

Step 3: Apply the caulk using a caulk gun. Be sure to apply it at a steady speed so that you don’t form lumps at certain spots.

Step 4: Smooth out the caulk before it dries – the easiest thing to do is to wet your finger and run it along the line of caulk which will smooth it out and remove any lumps which have formed.

Step 5: Remove the tape.

Step 6: Let the caulk dry.

How to caulk baseboards to tile floor?
Step 1: Clean the floor and baseboard. Remove any previously applied caulk.

Step 2: Apply tape to the floor and the baseboard edges.

Step 3: Apply the caulk at an even speed to ensure no beads or lumps form.

Step 4: Smooth out the caulk before it dries and remove the tape.

Step 5: Let the caulk dry.

Final Thoughts

We hope this guide helps you pick the right caulk for your baseboards.  While all of the caulks we reviewed are great choices, our pick for its mildew and water resistance, fast drying time and overall durability is Gorilla White Silicone Sealant Caulk. Your choice may differ depending on your specific requirements though, and we hope this guide helped you realize what caulk works the best for you. Happy sealing!