1 LB Mass Loaded Vinyl 4' x 10' (40 SF) STC 26 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 hydro-powered manufacturing facility in Quebec. Non-toxic, odor-free, and compliant for residential, commercial, and institutional use. Purchased direct from the manufacturer — no distributor margin, no markup.