MLV Weight:
Choose the best barrier for your project.
Roll Size — 1 LB MLV
Select the best size for your project
| Size | Coverage | Price | Per SF | Select |
|---|---|---|---|---|
| 4' x 4' | 16 SF | $64.99 | $4.06/SF | |
| 4' x 10' | 40 SF | $124.99 | $3.12/SF | |
| 4' x 15' | 60 SF | $159.99 | $2.67/SF | |
| 4' x 25' | 100 SF | $249.99 | $2.50/SF | |
| 4.5' x 10' | 45 SF | $134.99 | $3.00/SF | |
| 4.5' x 20' | 90 SF | $214.99 | $2.39/SF | |
| 4.5' x 30' | 135 SF | $344.99 | $2.56/SF |
EnviroFlex® 1LB 4' x 4' MLV Soundproofing
EnviroFlex® Mass Loaded Vinyl is a premium, high-performance soundproofing solution designed for homeowners, contractors, and commercial builders who need maximum noise control. Made from dense, flexible recycled vinyl, this acoustic barrier blocks sound transmission through walls, ceilings, floors, and vehicles, delivering reliable results without bulky materials. Whether you’re tackling a DIY soundproofing project or managing a large-scale commercial installation, EnviroFlex MLV offers the ideal balance of performance, durability, and sustainability.
With a high STC (Sound Transmission Class) rating, EnviroFlex® effectively reduces airborne noise such as voices, music, machinery, and traffic. Its flexible composition makes it easy to cut, shape, and install, whether applied directly to studs, layered behind drywall, or combined with insulation for superior results. Unlike spray foams or fiberglass alone, MLV creates a continuous, dense barrier that stops sound at the source.
EnviroFlex® MLV is available in both 1 LB and 2 LB per square foot options, giving you the ability to match weight and performance to your specific application. Typical uses include residential remodeling, commercial office construction, music studios, home theaters, industrial spaces, and even vehicle and van soundproofing. Backed by our commitment to eco-friendly manufacturing, EnviroFlex is crafted from 100% recycled materials, making it not only effective but also a sustainable choice for modern construction.
If you’re looking for soundproofing that works, EnviroFlex® Mass Loaded Vinyl delivers proven acoustic control with professional-grade quality. Reduce noise, improve comfort, and build quieter spaces with confidence.
Product Details
EnviroFlex® Mass Loaded Vinyl is a premium, high-performance soundproofing solution designed for homeowners, contractors, and commercial builders who need maximum noise control. Made from dense, flexible recycled vinyl, this acoustic barrier blocks sound transmission through walls, ceilings, floors, and vehicles, delivering reliable results without bulky materials. Whether you’re tackling a DIY soundproofing project or managing a large-scale commercial installation, EnviroFlex MLV offers the ideal balance of performance, durability, and sustainability.
With a high STC (Sound Transmission Class) rating, EnviroFlex® effectively reduces airborne noise such as voices, music, machinery, and traffic. Its flexible composition makes it easy to cut, shape, and install, whether applied directly to studs, layered behind drywall, or combined with insulation for superior results. Unlike spray foams or fiberglass alone, MLV creates a continuous, dense barrier that stops sound at the source.
EnviroFlex® MLV is available in both 1 LB and 2 LB per square foot options, giving you the ability to match weight and performance to your specific application. Typical uses include residential remodeling, commercial office construction, music studios, home theaters, industrial spaces, and even vehicle and van soundproofing. Backed by our commitment to eco-friendly manufacturing, EnviroFlex is crafted from 100% recycled materials, making it not only effective but also a sustainable choice for modern construction.
If you’re looking for soundproofing that works, EnviroFlex® Mass Loaded Vinyl delivers proven acoustic control with professional-grade quality. Reduce noise, improve comfort, and build quieter spaces with confidence.
Product Specifications
Shipping
Ships rolled in a box about 50" long. Depending on roll size and quantity, orders ship by parcel carrier or LTL freight with lift-gate delivery. Free shipping to the contiguous U.S. Orders ship within 2 business days, excluding holidays. We cannot ship to PO boxes.
Frequently Asked Questions
What is the difference between 1 LB and 2 LB MLV?
1 LB MLV (about 1/8" thick, STC 26) suits most walls, ceilings, and vehicles. 2 LB MLV (about 1/4" thick, STC 32) doubles the mass for studios, theaters, and tougher noise problems.
How do I install mass loaded vinyl?
Fasten MLV to studs or joists with screws and washers or a cap stapler, overlap or butt the seams, and seal every seam with MLV seam tape. Leave it to relax flat before hanging. See our MLV installation guide.
How does MLV ship?
Rolls ship in a box. Free shipping to the contiguous U.S.; orders ship within 2 business days, excluding holidays.
What STC 26 Means in a Real Wall Assembly
MLV works by adding dense, flexible mass to the wall system. The standalone STC rating matters, but the bigger result comes from how the material performs as part of a complete wall, ceiling, or enclosure assembly.
Standalone STC shows material performance
For this product, STC 26 STC gives shoppers a simple way to understand the material’s sound-blocking capability before installation.
Assemblies perform better than single layers
MLV is most effective when combined with drywall, insulation, sealed seams, and proper mechanical fastening.
Seams and gaps matter
Sound travels through weak points. Seal seams, edges, outlets, and penetrations to get the best result from the system.
Important: STC results depend on the full assembly, including framing, insulation, drywall layers, sealed seams, penetrations, and installation quality.
Built for Real-World Use
Walls
Use as a barrier layer in wall assemblies where added mass helps reduce sound transfer.
Ceilings
Add material above or below ceiling assemblies to support better noise control between spaces.
Vehicles
Cut to fit vans, cars, service vehicles, and other mobile spaces that need added sound control.
Install Your Mass Loaded Vinyl
Measure the area
Measure the wall, ceiling, floor, or vehicle panel and plan your roll layout to minimize seams.
Cut to size
Unroll the MLV face up and cut it with a sharp utility knife along a T-square or straightedge.
Hang the MLV
Fasten it to studs or joists with screws and fender washers or a cap stapler, keeping the sheet flat and taut.
Seal every seam
Overlap or butt the seams and seal them, and all edges, with EnviroFlex® MLV seam tape.