Thursday, July 18, 2024

Best Acoustic Sealant – Buyer’s Guide

Are you looking to soundproof your home or office? If so, you’ll need to find the best acoustic sealant for the job. There are a lot of different products on the market, so it can be tough to decide which one is right for you. In this post, we’ll discuss the different types of acoustic sealants and recommend our top picks. Keep reading to learn more!

Acoustic Sealant vs Regular Caulk

First, you’ll need to know the difference between regular caulk and acoustic sealant. While they are both used to make spaces airtight, soundproofing is their primary purpose. Acoustic sealant is specifically designed for this job. It’s typically thicker than caulking and features a rubber-like consistency that allows it to fill larger gaps.

Caulk is a thin, gooey liquid made from latex or silicone. This sealant is used for smaller cracks and holes where sound could potentially get through. It’s best used on seams in walls and ceilings to keep out noise from the room below. Often, this type of caulk can be painted after it dries to match the surrounding decor.

Acoustic sealant is a little different. It can be used on seams, but it’s made to fit large gaps in place of weather stripping or other materials. This kind of sealant will not dry out if exposed to air and needs to be applied with a caulking gun for best results.

Tips & Tricks: How to Use Your Acoustic Sealant Correctly

The acoustic sealant comes in tubes similar to caulking. It’s most effective when applied with a caulking gun found at your local hardware store or online . You’ll want to make sure all seams are clean and dry before applying the sealant, lest you trap moisture behind the walls.

  1. Start by placing the tube of acoustic sealant into your caulking gun. Cut off the tip of the tube and place it over the notch on your gun where you’d load a standard cartridge of caulk.
  2. You should tape off the area around each seam before applying the sealant. This is necessary for two reasons. First, it prevents your walls from being stained by any excess sealant, which can be tough to remove. Second, it ensures that your seams are airtight once the sealant sets.
  3. You’ll likely need more than one tube of acoustical sealant for larger jobs. It’s best to work on one section at a time since acoustic sealant needs several hours to fully dry. If you apply too much at once, it will likely slide down your walls and form a large mess.
  4. Before you apply the sealant, place some on the tip of your finger. Rub it between your thumb and pointer finger to smooth it into an even consistency before applying it to the seams. Use long, upward strokes with the caulk gun to create a clean seal. Work in small sections at a time, clearing out your gun often to avoid clogs.

Video: How to Install Acoustic Sealant for Drywall

Best Acoustic Sealant: FAQs

What is acoustic caulking?

The acoustical caulking is used to seal all gaps on the perimeter of sound control walls, floors and ceilings. It can also be applied around electrical outlets or pipe penetration; once dry it becomes paintable in color choice which will match your other interior painting needs!

Does acoustic sealant work?

Acoustic caulk is a fantastic way to reduce external sound and increase insulation in your home by up-to 15%. Just apply it around edges, fill gaps & holes with this easy technique that has been proven successful time after again!

How long does acoustic sealant take to dry?

Acoustical sealant takes 48 hours to dry, so make sure you leave it alone for that long. Don’t interfere with the application process and also avoid applying any covering material until then!

Can I paint acoustic sealant?

As you should apply the sealant around light switches, windows, sockets, and to seal the gaps between bits of plasterboard, it’s good to know that acoustic sealant handles paint well. When you’re painting a room, this will ensure you can paint everywhere and still get a nice even finish.

How can I clean acoustical sealant?

To remove excess sealant and smears from the joint interface, use xylene or mineral spirits on a cloth. You can also clean any tools that come into contact with these materials by wiping them down using an appropriate cleaner like those found in your garage!

Best Acoustic Sealant: Comparison Table & Main Features

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Major Things to Consider While Buying the Best Acoustic Sealant

Now that you understand the basics of buying acoustic sealant, it’s time to shop around for your perfect product! Here are a few key attributes you’ll want to consider when choosing the best product for your needs:

1. Water-Based or Solvent-Based Acoustic Sealant Water-based acoustic sealants are a popular choice for their ease of use and low price. They’re also very safe to apply indoors, which is great if you suffer from allergies or sensitivity to chemicals. Water-based sealants don’t emit any dangerous fumes during application, so you can work on your soundproofing project worry-free.
On the other side of the coin, solvent-based acoustic sealants are known to be more durable. Their thicker consistency helps them fill gaps better than water-based options. They’re also great for filling seams in concrete or brick, unlike water-based sealants that can’t bond to hard surfaces. This type may smell a bit more, but it’s worth the tradeoff for improved durability.
2. STC Rating The STC rating, or Sound Transmission Class, measures how well a material can block sound from passing through it. While the higher the STC number is, the better your acoustic sealant will serve its purpose. For example, a single-pane window that features an STC of 50 decibels blocks most outside noise from entering a room.
3. Critical Listening Tests Besides the STC, another way to see how powerful your acoustic sealant will be is by doing an A/B listening test. Get two people in the room with you and have each stand on either side of a wall or door that features your new sealant. If one person can hear the other clearly through the wall, then your acoustic sealant needs to be improved upon. If they can’t hear each other at all or there’s an obvious difference in volume levels, then you’re good to go.
4. Waterproofing Ability If you live in an area where it rains constantly, you’ll want to make sure your acoustic sealant is waterproof. Otherwise, any moisture that seeps through your walls will create a breeding ground for mold and mildew. Not only would this be bad for your health, but it can also damage the integrity of your structure and ruin your soundproofing.
To put it bluntly, acoustic sealants that are waterproof are also more expensive because they’re designed to withstand harsh conditions. If you don’t live in an especially wet environment, then opt for a cheaper water-based product instead of splurging on the pricier waterproof option.
5. Finishing Product Another factor to keep in mind when shopping for the best acoustic sealant is what type of finishing product you’ll use on top. Acoustic sealants are available in either paint or caulk form. Paint gives a more even coverage and can be painted over if needed, but it may flake off with time. Acoustic caulk is thicker and may look less aesthetically pleasing, but it can bond to just about any surface. Also, it’s not as susceptible to peeling as paint could be.
Whichever you choose is up to personal preference and the application process. Some people find that one product works better than the other depending on the situation, so consider this when making your decision.

1. Green Glue Noiseproofing Sealant – Easy-to-Work

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Green Glue Specifications

Product Dimensions 14 x 8 x 6 inches
Item Weight 5.64 Ounces
Set 6 tubes w/ nozzles – each tube is 29 oz
Includes Specialty Cleanup wipes and TMS installation guide
Paintable Caulk color is white
Dries Completely in 48 hours
STC The sealant increases STC (Sound Transmission Class) rating, which is necessary in LEED certified facilities.
Finishing After the sealant is applied cover with standard finishing materials such as mudding and taping.
Application Considerations It is recommended a 1/8 to 1/4” (0.3 to 0.6 cm) gap be left around the perimeter of your wall or ceiling drywall to fill with Noiseproofing Sealant. Sealing gaps of 5/8” or more with the Sealant is not recommended, as it will not cure properly in large gaps. Instead, for excessively large gaps deeper than an inch consider using backer rod to fill the gap before applying Sealant. The sealant is only intended to be an acoustical seal; it is not intended to be a water seal or to be used in exterior applications. Do not use the sealant to seal around pipes or plumbing.
Check out this Green Glue Noiseproofing Sealant (official website), which helps to reduce noise levels by up to 50%. So you can stay comfortable all summer long without having to deal with disruptive noise. Plus, our energy-efficient design will help you save on cooling costs.

Includes Specialty Cleanup

Specially designed for soundproofing, Green Glue Noiseproofing Sealant is perfect for anyone looking to reduce noise levels in their home or office. With a simple installation process and cleanup wipes included, it’s easy to achieve superior soundproofing results.

Sound Rated Caulk

Keep your peace and quiet with Green Glue Noiseproofing Sealant. This sound-rated caulk is perfect for sealing penetrations and perimeter gaps to keep unwanted noise out. So whether you’re trying to get a good night’s sleep or need some peace and quiet during work, this sealant will do the trick!


This sealant is worth the price if you want to add some sound insulation to your walls! Check price at

Video: Applying Green Glue Noiseproofing Sealant

2. Auralex Acoustics STOPGAP Acoustical Sealant – Paintable & Nonstinging

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Auralex Acoustics STOPGAP Specifications

Product Dimensions 17 x 3 x 3 inches
Item Weight 3 pounds
Applications Wall, Ceiling & Floor
Certification Meets ASTM C-834 standards for flame
Paintable Stopgap is paintable and nonstinging
Coverage Coverage per 28 oz. cartridge is approximately ~40 linear ft. with a 3/8 inch bead applied
STC Will achieve a Sound Transmission Class (STC) of 53 when applying it in accordance with ASTM C-919 Standard Practice for use of Sealants in Acoustical Applications. To achieve the 53 STC, StopGap should be applied as two beadsof sealant at the top, bottom and all perimeter edges.
Special Features highly elastic, water-based sealant used for reducing sound transmission at the perimeter of wall systems or around electrical box cutouts, has no residual run-off
Application Considerations Comes in a large, 29 oz caulking tube and therefore requires a larger than normal-sized caulking gun, which can be purchased at any local hardware store. For best sound isolation, Auralex recommends incorporating the following products into your room construction in the options shown above
Looking for an attractive soundproofing material that’s simple to install? Try Auralex Acoustics STOPGAP Acoustical Sealant (official website), which features a non-adhesive design so you can fix it in place whenever you want. Auralex Acoustics STOPGAP is designed to reduce noise while adding visual appeal to your rooms. To accomplish this, our STOPGAP product features an attractive matte finish that’s easy on the eyes and won’t block soundproofing performance.

Easy to Install

Because Auralex Acoustics STOPGAP is non-adhesive, you can place it precisely where it needs to be without worrying about ruining your walls. This makes it a simple and easy solution for acoustic problems.

Athletic Finish

When applied, Auralex Acoustics STOPGAP Acoustical Sealant gives your walls a matte look that’s perfect for athletic or exercise rooms. So you can complete your home gym without creating noise disturbances in adjacent spaces!


If it’s a matte finish you’re looking for, then this is worth checking out. Check price at,

3. TMS Acoustical Caulk – Sound, Draft & Smoke Barrier

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TMS Acoustical Caulk Specifications

Product Dimensions 14.48 x 8.15 x 6.06 inches
Item Weight 1.75 pounds
Set Available in cases of 12 or 6 tubes
Coverage 28 oz (quart size) tube – 1/4″ bead application will cover approx 85 lf and 40lf for a 3/8″ bead
Specialty Sound Formula Provides a long lasting and permanent flexible bond
Chemistry Acrylic Polymer
Tooling Time 10 – 15 minutes
Full Cure Time 3 – 7 days
Application Temperature 40°F – 120°F
VOC 23.3 g/l
Shelf Life 2 years
TMS Acoustical Caulk (official website) is designed to work with both drywall and plywood. As such, this caulk can be used for various applications in your home or office, perfect for quick acoustic repairs!

Paintable Finish

For a completely finished look, TMS Acoustical Caulk provides a paintable finish that can be color customized to match your surroundings. This way, you can enjoy superior soundproofing results without having to sacrifice the aesthetics of your rooms.

Non-Toxic Formula

Based on TMS’s expertise as an acoustic company, this caulking product features a non-toxic formula that doesn’t contain any harmful chemicals. So you can avoid mistaking this as regular caulk and use it without worry!


This product delivers on its promise to provide quiet rooms with an attractive finish. Try this if you want a safe option for soundproofing and sealing acoustical problems!

4. Titebond Acoustical Smoke and Sound Sealant – Green Environmental Attribute

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Titebond Acoustical Specifications

Product Dimensions 16 x 2.5 x 2.5 inches
Item Weight 0.16 Ounces
Base Acrylic Polymer (Non-Reactive)
Certification Meets: ASTM C834, ASTM E90, Meets NFPA Class A Fire Rating
VOC Level Meet SCAQMD Requirements, 40.82g/L
Color White
Application Time 10 to 15 min.
Performance Temperature Range -20 Degrees to 150 Degrees F
Application Temperature Range 40 Degrees to 120 Degrees F
Full Cure 24 hr.
Looking for an all-in-one soundproofing solution? Then look no further than Titebond Acoustical Smoke and Sound Sealant (official website), which offers a number of features to provide you with superior acoustic results. To enhance room acoustics, this smoke and sound sealant uses unique polymer-modified gypsum for maximizing soundproofing results. As such, you’ll enjoy the benefits of exceptional noise reduction without having to deal with messy cleanup or unsightly caulking.

Low VOC Formula

Based on Titebond’s expertise in adhesives and sealants, this product incorporates a low VOC formula that delivers great results without giving off harmful chemicals. So you can sleep easy knowing both your walls and the people around you are safe!

Lightweight Design

Forgoing the typical caulk tube for a lightweight design, Titebond Acoustical Smoke and Sound Sealant let you easily apply acoustic sealing tape to hard-to-reach areas. This means that you can easily fix a variety of problems without having to worry about a bulky design.


The Titebond Acoustical Smoke and Sound Sealant is worth considering if you’re looking for a lightweight all-in-one soundproofing solution! Check price at,,

Video: Titebond Sealants Review

5. OSI SC175 Draft and Acoustical Sound Sealant – Specific STC Value

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OSI SC175 Specifications

Product Dimensions 10.63 x 8.13 x 16.88 inches
Item Weight 39.1 pounds, 12 pack of 28 ounce cartridges
VOC Level 25 g/L [1-Percent]
Base Water-based, Non-flammable
Paintable Easy-to-use and paintable when cured
Application Areas Is used for exposed and unexposed applications at perimeter joints, floor and ceiling runners either wood or metal, cut-outs in gypsum board, veneer plaster systems and other areas where a sound rated assembly is required.
Certification UL tested and classified R9732
Give your home an elegant finish with the OSI SC175 Draft and Acoustical Sound Sealant (official website). This product provides a high-gloss finish that gives off a lustrous appearance. As such, you’ll be able to enjoy superior soundproofing results without having to sacrifice the aesthetics of your rooms!

Rigid Formula

Featuring a rigid formula that rests well on vertical and horizontal surfaces, this soundproofing product gives off a lustrous finish without the need to constantly reapply. This makes it perfect for giving rooms an elegant look!

Gap Filler

Formulated to close up air leaks around doors and windows, the OSI SC175 Draft and Acoustical Sound Sealant lets you enjoy improved temperature efficiency and lower utility bills without having to sacrifice its high-gloss finish.


The OSI SC175 Draft and Acoustical Sound Sealant is a great product if you want to seal up air leaks around your doors and windows! Check price at,,

Video: OSI Quad Advanced Formula Sealant | The Home Depot Review

6. Gorilla White 100% Silicone Sealant Caulk, 10 Ounce Cartridge, White, (Pack of 1)

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Gorilla White Specifications

 Bestseller on Amazon!

Gorilla White 100% Silicone Sealant Caulk has over 9,900 ratings and 4.6 out of 5 stars – it’s a bestseller on Amazon!

Easy to Use

This white, 100% silicone sealant is durable and versatile. Gorilla sealant is ideal for kitchen, bathroom, window, door and automobile plumbing as well as guttering and more! After 30 minutes in water, this waterproof compound is mold & mildew resistant. The translucent silicone sealant does not yellow or shrink over time.

All surfaces should be clean and debris-free. It’s best to utilize over 40 degrees Fahrenheit. Cut the tip at a desired bead size. With a caulking gun, apply sealant to the surface. As soon as possible after application, smooth out the bead before a skin forms.

No Mold

Gorilla White 100% Silicone Sealant Caulk is a great product to use in areas that need to be waterproof and/or mildew resistant. It can be used indoors or outdoors and forms a durable, waterproof bond that is mold and mildew resistant. Gorilla White 100% Silicone Sealant Caulk is also great for use in areas that need to be protected from the elements, such as around windows and doors.


  • durable
  • versatile
  • waterproof
  • mold and mildew resistant
  • great for use in areas that need to be protected from the elements

81Yq5tgJ4GL. AC SX425 Best Acoustic Sealant - Buyer's Guide

In Conclusion

As you can see, there are many different options when it comes to finding an all-in-one solution for your home! Not only do these products let you seal up cracks but they also help keep your walls beautiful. What’s more, many of these products are designed to easily adhere to surfaces for hassle-free installation.

So if you’re looking for an all-in-one solution that’ll help keep your home protected not only against leaks but also against temperature changes, give these products a try! With the right product on hand, you’ll be able to enjoy unmatched soundproofing results in no time!

Flick Emil Henricus

I'm a 34-year-old freelance musician and soundproofing specialist, DIY enthusiast, blog author, and Silence Wiki founder originally from the Netherlands. I've been a musician for over 15 years now - playing all sorts of instruments but especially guitar and saxophone. As a soundproofing specialist, I help people with their acoustic needs in order to make them happy! I also enjoy DIY projects around the house or wherever else they are needed - thanks to my wife who always has great ideas!

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