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 10' MLV Soundproofing
The 4' × 10' roll is the most popular entry point for residential soundproofing projects. At 40 square feet, it covers a standard apartment wall section, a full vehicle cargo area, a single room ceiling panel, or the primary wall in a home office or recording space. It's the right size when you know what you need and want enough material to complete a meaningful install in one order.
EnviroFlex® 1 LB MLV achieves a standalone STC rating of 26 — independently lab-tested, not estimated. At 1 lb per square foot and approximately 1/8" thick, it delivers the mass and limpness needed to block airborne noise including voices, music, TV, and traffic through walls, ceilings, floors, and vehicle panels. Added to a standard wall assembly with insulation, total STC performance reaches 41–45 or higher.
Cut with a utility knife and straightedge — no special tools or skills required. Staple, screw, or nail to studs or joists. Tape seams with EnviroFlex® MLV Seam Tape for a continuous, airtight barrier. Drywall or finish over the top for a permanent install, or leave exposed for automotive and industrial applications.
Made from 100% post-industrial recycled vinyl at our North American manufacturing facility. Non-toxic, odor-free, and compliant for residential, commercial, and institutional use. Purchased direct from the manufacturer — no distributor margin, no markup.
Product Details
The 4' × 10' roll is the most popular entry point for residential soundproofing projects. At 40 square feet, it covers a standard apartment wall section, a full vehicle cargo area, a single room ceiling panel, or the primary wall in a home office or recording space. It's the right size when you know what you need and want enough material to complete a meaningful install in one order.
EnviroFlex® 1 LB MLV achieves a standalone STC rating of 26 — independently lab-tested, not estimated. At 1 lb per square foot and approximately 1/8" thick, it delivers the mass and limpness needed to block airborne noise including voices, music, TV, and traffic through walls, ceilings, floors, and vehicle panels. Added to a standard wall assembly with insulation, total STC performance reaches 41–45 or higher.
Cut with a utility knife and straightedge — no special tools or skills required. Staple, screw, or nail to studs or joists. Tape seams with EnviroFlex® MLV Seam Tape for a continuous, airtight barrier. Drywall or finish over the top for a permanent install, or leave exposed for automotive and industrial applications.
Made from 100% post-industrial recycled vinyl at our North American manufacturing facility. Non-toxic, odor-free, and compliant for residential, commercial, and institutional use. Purchased direct from the manufacturer — no distributor margin, no markup.
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.