Windows crack, dry out, and get old, revealing gaps that air, water, and bugs can slip through. It’s often simple to repair the gaps with a quick trip to the local hardware store for some caulking, but once there, you can find an overwhelming amount of choices. There are so many types available that getting the right caulk for the job can be a real challenge.
We’ve already reviewed countless brands of caulking for every purpose and have chosen eight brands that we believe are perfect for calking windows. We’ll go over each brand of caulk with you and tell you what we liked and what we didn’t so you can get a better sense of what you need.
We’ve also included a window caulking buyer’s guide where we break down exactly what a window caulk is and what you should look for before you make a purchase.
Keep reading for our detailed reviews of each window caulk, where we compare applicators, weather resistance, fumes, and cleanup, to help you make an educated purchase.
|Gorilla Clear 8050002|
|Flex Shot 30804|
|Loctite 908570||2.7 oz.||4.35/5|
|Sashco 10016||10.50 oz.||4.10/5|
The Gorilla Clear 8050002 Silicone Sealant Caulk is our choice for the best overall caulk for windows. This 10-ounce caulk dries completely waterproof and is perfect for areas around your windows that collect water. It dries clear so you can use it right on the glass if you need to and its mold and mildew resistant. It dries fast and can is submersible 30-minutes after application.
The primary downside to the Gorilla caulk is the need for plenty of ventilation and protective gear due to the potent and harmful vapors it releases while you are applying it.
The GE GE500 Silicone Sealant Caulk is our pick for the best value, and we think you will agree that it’s the best caulk for windows for the money. This low-cost caulk sticks to almost anything and is completely weatherproof when dry. It’s immune to ultraviolet rays and won’t crack due to temperature changes. It’s a freezeproof silicone that remains pliable in below 0-degree temperatures. It’s fast-drying and ready to go 30 minutes after you apply it.
We wished there was a little bit more in the bottle, and once opened, the product starts to deteriorate in the container no matter how well you seal it up.
The Flex Shot 30804 Rubber Adhesive Sealant Caulk is our premium choice and is for anyone that wants the best window caulk available and isn’t afraid to spend the extra money to get it. This caulk is easy to apply and doesn’t require a caulking gun. Instead, you use it by bending the tip the way you might on a whipped-cream or squeeze-cheese can. It features a powerful adhesive and will stick to most surfaces and remains flexible. It expands and contracts to keep gaps sealed
The downside to the Flex Side is its high cost and laborious cleanup. Many of the other caulk on this list clean with soap and water, but this will need alcohol or mineral spirits to remove it from your hands and other surfaces.
The Loctite 908570 Clear Silicone Waterproof Sealant is a small 2.5-ounce container of silicone adhesive sealant. This sealant provides a strong bond between glass, wood, and metal, but isn’t for plastics and polyethylene type surfaces. It’s easy to apply and comes with an included application nozzle. When it’s dry, it’s completely waterproof.
We were impressed with the strength of the bond, but you only get a small amount, maybe enough to go around one window, and the bottom of the tube comes undone and leaks.
Sashco “Big Stretch” Caulk is a 10.5-ounce interior caulk. This caulk is very durable and has a strong adhesive that sticks to almost any surface and holds it tight. This caulk will outlast most other caulks and is paintable after a few days.
The downside to the Big Stretch is that it isn’t waterproof, so if your windows collect a lot of moisture our you’re looking to seal your windows from rain, this isn’t the best product. It also takes forever to dry and attracts dirt while it does.
The DAP 801 Caulk is a 10.1-ounce interior and exterior caulk. Once dry, this caulk is very durable and can handle extreme 180-degree temperature changes. It uses a strong adhesive that sticks to most surfaces, including brick. It’s water-resistant and will remain flexible for years. There’s very little odor during application, and it produces almost no VOCs.
This caulk was a little bit hard to apply because it’s not quite as thick as many other brands. The bead tends to come out unevenly, which often leads to attempts to fix it, which usually makes it worse and can create a mess.
The Red Devil 0846 Caulk is a 10.1-ounce caulk by Red Devil that dried to a smooth finish. It’s mildew resistant and paintable when dry and comes in several colors if you choose not to paint.
We found it a little challenging to work with because the caulking is very thin, and it’s near impossible to get an even bead. It comes out fast, and we got it everywhere. Luckily, it does clean thoroughly with warm water, but it was messy.
The Red Devil 0848 EZ Squeeze Window & Door Caulk is the last brand of caulk on our list. Though the Red Devil isn’t as good as our first three choices, it may be helpful in an emergency. This brand is a 5-ounce caulk that features a unique EZ squeeze tube. The design uses a dial mechanism to squeeze out the caulking. It’s mold and mildew resistant, water-resistant, and is suitable for indoor and outdoor applications.
The problem with this brand is the EZ squeeze tube. While it’s a great idea, the dial doesn’t work that well to squeeze out the caulk and is frustrating to use. It also wastes some of the caulk, and there’s only a little. The caulk is not very sticky, and it is difficult to get it where you want it.
Let’s look at some of the essential things to look for when purchasing a window caulk.
You can purchase caulk with a latex or silicone base, and each has specific advantages and disadvantages.
Latex caulk is much easier to apply than silicone caulk, and it’s easier to remove if you need to. Latex is paintable, doesn’t have a strong odor, and is easy to clean up with soap and water. It works well on porous and non-porous surfaces and is best when there is a constant gap that needs filling.
Silicone caulk is messier than latex. It usually has a bad odor and requires plenty of ventilation during application. Cleaned up silicone caulk with turpentine or mineral spirits. It lasts longer and is more versatile than latex, but it is more difficult to remove and is only suitable for non-porous surfaces. It also lasts longer than latex, but many brands cannot receive paint.
Besides their silicone or latex base, caulks are designed to fill a specific purpose in the home, and there are several types.
Adhesive caulk is for joining two pieces of material together. This type of caulk has strong bonding features and is resistant to splitting or cracking as surfaces expand and contract.
Asphalt caulk is an exterior caulk for using on asphalt driveways and roads. This caulk is often dark in color, resists staining, and high temperatures and forms a watertight bond with the pavement.
Concrete caulk is an exterior caulk with many of the same properties as asphalt caulk, but it is often lighter in color and dries very quickly.
An exterior caulk is a general-purpose caulk designed for exterior surfaces such as windows and trimming. This type of caulk usually dries quickly, is resistant to stain, and has UV resistant qualities.
Fire retardant caulk is for the warmer areas around your home. This type of caulk is for sealing HVAC vents and chimney gaps. It’s non-combustible, withstands high temperatures without melting, and blocks fire.
Gutter caulk is for use on your gutters and other exterior metal surfaces. This type of caulk can withstand high temperatures and remains flexible.
Kitchen and bath caulk is an interior caulk designed for areas of the home exposed to water and humidity. This caulk is fast drying, waterproof, and paintable.
Mortar caulk is for brick and other porous stone around your home. It’s designed to seal leaks and cracks, withstand high temperatures, and blend in with textured surfaces.
Molding and trim caulk is an interior caulk for walls, boards, and molding. This caulk is fast drying and paintable.
Roofing caulk for minor roof repairs and leaks. It’s flexible can withstand high heat and is mold and mildew resistant.
Window and door caulk is an interior caulk designed to give your windows and doors an airtight seal. Window caulk is fast drying and paintable, and it won’t shrink or crack.
Many caulks cannot receive paint and are available pre-tinted. In this case, you should try to get a color as close as possible to the color you need. White is another standard color that often looks nice as trim, and many caulks are transparent.
All types of caulking are applied using a caulking gun. A caulk gun is a simple device that allows you to load the caulk you are using and spread it by squeezing a trigger to expel the caulk from the tube. The primary thing to be concerned with is that you get the appropriately sized gun for the container of caulk you have. There are two standard sizes, a 3 to 6-ounce capacity and a 9 to 11-ounce volume.
We hope that you have enjoyed reading over our window caulking reviews and buyer’s guide and are closer to deciding which brand you want to use. We stand by our choice for the best overall window caulk. The Gorilla Clear 8050002 Silicone Sealant Caulk sticks to anything, is 100% waterproof, and dries clear so won’t even notice it. The GE GE500 Silicone Sealant Caulk is our choice for the best value, and it’s almost as good you just don’t get as much.
If you have learned something new about window caulk, and feel more confident about making your next purchase, please share these window caulk reviews with your friends on Facebook and Twitter.
Featured Image Credit By: GE GE5000, amazon
Hi there! My name is Adam and I write for HealthyHandyman. I have a great passion for writing about everything related to tools, home improvement, and DIY. In my spare time, I'm either fishing, playing the guitar, or spending quality time with my beloved wife. You'll also often find me in my workshop working on some new project!