Best Soundproofing Material, From Sealing Gaps to Damping Walls
The best soundproofing material to start with is acoustic caulk, because in HUD’s Noise Guidebook a single crack 1/16 inch wide and 16 inches long drops a wall rated STC 50 to STC 40.
| Pick | Best for | Why |
|---|---|---|
| Trademark Mass Loaded Vinyl | Mass inside a wall or ceiling | 1 lb per sq ft, in a 4 x 10 ft roll |
| Green Glue Noiseproofing Compound | A second layer of drywall | Damps the layers without decoupling |
| RYB HOME 3-Layer Soundproof Curtain | Windows, with no construction | 3 layers, 84 in long |
| MAXTID Under Door Draft Stopper | The gap under a door | A 38-inch strip for the door bottom |
| Acoustical Caulk | Gaps around frames and boxes | Seals the paths that bypass the wall |
| Owens Corning 703 fiberglass board | Echo inside a room | NRC 1.00 at 2 inches |
| US Cargo Control Sound Dampening Blanket | Rentals | Hangs from grommets and comes down |
- ✓ Damps a second drywall layer without decoupling the wall
- ✓ Converts drywall vibration into heat instead of transmitted sound
- ✓ No-construction noise reduction for windows and room dividers
- ✓ Easy to install and remove for renters
- ✓ 38-inch strip for the bottom of the door, per the listing
- ✓ Confirms whether the door is the real bottleneck before bigger work
- ✓ Seals the air leaks that bypass every other material
- ✓ Stays flexible permanently unlike standard caulk that cracks
- ✓ NRC 1.00 at 2 inches under ASTM C423, per Owens Corning
- ✓ 3.0 pounds per cubic foot, per Owens Corning
- ✓ Removable mass layer for renters who cannot modify walls
- ✓ Grommets make hanging and repositioning practical
If you’re shopping for the best soundproofing material, know that no single product does the whole job, and expecting one to is why a first purchase often does the wrong job entirely.
The problem is that “soundproofing material” gets applied to everything from mass loaded vinyl to acoustic foam, even though one blocks noise through walls and the other only absorbs echo inside the room. Picking the wrong category means the noise stays exactly the same no matter how much you spend.
Below you will find one recommended product for each category of soundproofing material — from mass barriers and damping compounds to door seals and sealants — so you can match the right material to the right surface and get a real result on the first try.
Start by sealing gaps with acoustic caulk and a door seal, then give the wall that leaks the most a second layer of drywall with Green Glue between the layers. Mass loaded vinyl goes further for severe noise, and a curtain or a sound blanket helps where nothing can be built, though neither matches a damped drywall wall.
The Best Soundproofing Material for Each Job
Each material below addresses a different part of the soundproofing problem. Most projects need at least two or three of these working together — mass alone will not help if the edges leak, and sealing alone will not help if the wall is paper-thin.
The picks are organized by the job each material does, not by price. A door seal can do more than a roll of MLV when the door is the real weak point.
Plain wood isn’t one of the picks: HUD rates 1 in of fir at 20 dB of transmission loss against 40 dB for 4 in of dense concrete, and our guide to what wood blocks and absorbs has the full table.
Wall and Ceiling Materials: Mass, Damping, and Cavity Fill
Four categories matter most: mass barriers, damping compounds, cavity insulation, and decoupling hardware.
Ceilings add footsteps to the problem, so Burton Acoustix’s ceiling material comparison weighs these same layers by their published impact (IIC) ratings as well as STC.
Best Mass Barrier: Mass Loaded Vinyl
Trademark Soundproofing Mass Loaded Vinyl is a 1 lb per square foot barrier sold as a 4 x 10 ft roll, for blocking airborne noise through walls and ceilings.
Trademark Soundproofing Mass Loaded Vinyl
At 1 lb per square foot, MLV adds density to a wall assembly without adding much thickness. It works best installed as a continuous, sealed layer between two rigid surfaces — typically between drywall layers or stapled to studs before the finish layer goes on.
Gaps between sheets reduce performance significantly, so overlapping seams and sealing edges with acoustic caulk is essential.
MLV earns its value inside wall assemblies where its thin profile and high density matter. Hanging loose MLV on a finished wall provides less benefit than the same weight of additional drywall, because drywall creates a rigid sealed surface.
For the full wall approach, see best soundproofing panels, and for barrier and blanket picks matched to each wall, our guide to the best soundproofing for walls.
Best Damping Compound: Green Glue
Green Glue Noiseproofing Compound is a damping compound sold in a case of 12 tubes, applied between two layers of drywall in walls and ceilings.
Green Glue Noiseproofing Compound
Applied between two layers of drywall, Green Glue converts vibration energy into heat. That means less sound passes through the drywall sandwich to the other side.
In an independent NRC Canada test, an unnamed damping compound between two layers of 5/8-inch gypsum board raised a wall from STC 44 to 52.
Green Glue’s brochure says to use 1 or 2 tubes per 4 x 8 ft sheet, and that one tube gives about 70% of the benefit of two, so a case of 12 tubes covers 6 sheets at two tubes each. For most bedrooms and home offices, drywall plus Green Glue is the best cost-to-performance upgrade available without full decoupling.
For the lab results by tube count, the curing time and what else can do the same job, see our page on whether Green Glue soundproofing works.
Best Cavity Insulation: Fiberglass or Mineral Wool Batts
Fiberglass or mineral wool batts fill the cavity between wall studs or ceiling joists and absorb sound there, which reduces resonance. ROCKWOOL says its batts are available at building supply retailers.
Without cavity insulation, the air space between drywall layers acts like a drum and can amplify certain frequencies. That is why even a well-sealed, heavy wall can still underperform if the cavity is empty.
Mineral wool is denser and stiffer than standard fiberglass batts, and ROCKWOOL says its batts friction-fit between the studs, but NRC Canada’s lab work on about 400 walls found denser absorbers help mainly at higher frequencies, not the low ones that set a wall’s STC rating.
This material only works inside cavities — it does nothing stuck to the surface of a finished wall. If you are building or opening a wall anyway, filling the cavities is one of the cheapest performance gains available.
Our guide to the best insulation for soundproofing compares fiberglass and mineral wool in the makers’ own wall tests and sizes the batt to your studs.
Best Decoupling Hardware: Resilient Channel or Clips
Once a wall is open, its new drywall can hang on resilient channel or on sound isolation clips that hold a furring channel off the studs. National Gypsum rates an insulated 2×4 wall with 5/8-inch Fire-Shield board on both faces at STC 36, and at 51 with one face on RC-1 resilient channel, while PAC International rates a 2×4 wall with 6-inch batts and its RSIC-1 clips on one side at 58, in a different lab.
Either one works only while nothing rigid bridges the gap, which is why PAC says its furring channel must not touch the framing. Our guide on how to soundproof a wall covers the clip spacing and the sealed edge the new board needs.
Door, Window and Gap Materials
The sealed edge that decoupled drywall needs matters just as much around doors and windows, which are almost always the weakest points in a room. The picks below add a layer over the glass, close the gap under the door and seal the gaps around frames, electrical boxes and drywall edges.
Best Soundproof Curtain: RYB HOME
RYB HOME 3-Layer Soundproof Curtain is our pick for a heavy curtain that reduces noise at windows and open spaces without any construction.
RYB HOME 3-Layer Soundproof Curtain
Curtains tested as whole barriers by the National University of Singapore rated only STC 13 to 21, so a heavy one is a modest extra layer for street noise once the window frame is sealed. They do not block low-frequency bass or heavy traffic rumble, so expectations need to match what fabric can physically do.
Curtains earn their keep when the window frame is already sealed and you want an additional layer of mass over the glass, or when you need a renter-friendly fix that comes down when you move. For a deeper comparison, see best soundproof curtains.
Best Door Seal: MAXTID Draft Stopper
MAXTID Under Door Draft Stopper seals the gap under the door with a 38-inch strip.
MAXTID Under Door Draft Stopper
Sealing the door gap before spending on wall treatments often reveals whether the door was the bottleneck all along.
If the door is the weak point, this is the first pick to try. If the door seal makes a noticeable difference, the next step is weatherstripping the sides and top of the frame.
If it barely helps, the noise is coming through the wall or ceiling instead, and the budget should go there. For the full door approach, see best door sweep for soundproofing.
Best Sealant: Acoustical Caulk
Acoustical Caulk seals the air gaps around door frames, window trim, electrical boxes, and drywall edges that let sound bypass every other material in the assembly.
Acoustical Caulk
Sound follows the path of least resistance.
Acoustic caulk stays flexible permanently, unlike standard caulk that hardens and cracks over time — that flexibility is what makes it suitable for joints that shift with temperature and settling.
In HUD’s Noise Guidebook, one 16-inch crack just 1/16 inch wide cuts a wall rated STC 50 to STC 40.
For the broader approach, see our soundproofing hub.
What Works for Echo or in a Rental?
Caulk and seals close leaks, but two common problems need something else. Echo and reverb inside the room call for an absorption board such as Owens Corning 703, and a rental that cannot be altered calls for a sound blanket that hangs and comes down.
Best Absorption Panel: Owens Corning 703
Owens Corning 703 fiberglass board absorbs echo, reverb and flutter inside a room: Owens Corning lists the 2-inch board at an NRC of 1.00 under ASTM C423, mounted flat against a solid backing.
Owens Corning 703 fiberglass board
This is not a soundproofing material in the blocking sense. OC 703 does not add mass or stop noise from passing through a wall.
What it does is absorb reflections inside the room, which makes speech clearer, music tighter, and the space feel quieter even though the actual noise transmission has not changed.
It earns a spot in this roundup because many “soundproofing” searches are actually room-treatment problems in disguise. If the issue is echo during video calls or muddy audio in a home studio, absorption panels are the right fix.
If the issue is neighbor noise through a shared wall, panels alone will not help — that requires mass, damping, and sealing. For the full treatment approach, see best soundproofing panels.
Best Temporary Barrier: Sound Dampening Blanket
US Cargo Control Sound Dampening Blanket is a 96 x 80 inch blanket that hangs from its grommets for temporary or renter-friendly noise reduction.
US Cargo Control Sound Dampening Blanket
Hanging a heavy blanket over a weak surface adds mass without construction. It will not match the performance of a drywall-plus-Green-Glue assembly, but it can take the edge off moderate noise in apartments, dorm rooms, and rental spaces where permanent modifications are not allowed.
The grommeted design makes it easy to hang from hooks and reposition as needed. It also works as a diagnostic tool — hang it over the suspected weak surface and listen.
If the noise drops noticeably, you have confirmed where the main leak path is before committing to a bigger investment.
How To Choose The Right Material
The decision is simpler than it looks once you think in order of priority instead of trying to pick one product.
Step 1: Seal Air Gaps First
Acoustic caulk and a door seal close the paths that bypass everything else, so they go in first.
Step 2: Identify The Weakest Surface
If the door is hollow with gaps, treat the door. If the wall is thin and the door is solid, treat the wall.
If the window rattles, treat the window. Treating the strongest surface while ignoring the weakest wastes money.
Step 3: Match The Material To The Job
Use mass (MLV, extra drywall) for thin surfaces that vibrate easily. Use damping (Green Glue) between rigid layers to reduce vibration transfer.
Use insulation (mineral wool) inside open cavities. Use curtains and blankets when you cannot modify the structure.
Step 4: Combine For Best Results
No single material solves the full problem. A wall treated with MLV but no sealed edges will leak around the perimeter.
A ceiling with insulation but no added mass will still transmit airborne noise through the drywall. The best results come from addressing mass, damping, absorption, and sealing together.
The Bottom Line
The best soundproofing material is always a system, not a single product. Start by sealing air gaps with acoustic caulk, then add mass and damping where sound passes through surfaces.
For most residential wall and ceiling projects, a second layer of drywall with Green Glue between layers delivers the best cost-to-performance ratio. For severe airborne noise, adding mass loaded vinyl to the assembly pushes performance further.
For renters and lighter fixes, a door seal such as the MAXTID Under Door Draft Stopper plus a soundproof curtain such as the RYB HOME 3-Layer Soundproof Curtain can deliver noticeable improvement without any construction.
For a complete room-by-room approach, see our soundproofing hub and related guides on best insulation for soundproofing, best soundproofing panels, and best soundproof curtains.
Frequently Asked Questions
What is the cheapest soundproofing material that actually works?
Acoustic caulk and a door seal are the cheapest effective soundproofing materials, and sealing the gaps around doors, windows and wall penetrations comes first.
After sealing, the next cheapest effective upgrade is an additional layer of standard 5/8-inch drywall.
Egg cartons aren’t a cheaper route to the same result, as our page on egg cartons as soundproofing explains.
Does acoustic foam work for soundproofing?
No. Acoustic foam is lightweight and designed to absorb high-frequency reflections inside a room. It adds virtually no mass to a surface and does not block noise transmission through walls, ceilings, or floors.
Foam is room treatment for echo control, not a soundproofing material.
