{"product_id":"1-lb-mass-loaded-vinyl-4-5x20-90-sf-flexible-soundproofing-roll","title":"1 LB Mass Loaded Vinyl 4.5x20 (90 SF) - Flexible Soundproofing Roll","description":"\u003cp\u003eIn this review the EnviroFlex 1 LB Mass Loaded Vinyl 4.5x20 (90 SF) is evaluated for homeowners, studio builders, and vehicle upfitters who need a straightforward way to reduce airborne noise. The bottom line: this roll delivers dense, flexible mass that noticeably cuts voices, traffic, and appliance noise when applied to walls, ceilings, floors, or vehicle panels. Installation is simple enough for a determined DIYer, and professionals will appreciate the 26 STC design intent and the non-toxic, odor-free vinyl construction.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eHigh density 1 LB per ft\u003c\/strong\u003e: Provides mass to block airborne sound transmission effectively across common partitions and vehicle panels.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e26 STC rating\u003c\/strong\u003e: Engineered for acoustic control to reduce voices, traffic, and appliance noise in residential and commercial spaces.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFlexible and easy to cut\u003c\/strong\u003e: The roll bends around curves and corners and can be trimmed with a utility knife without special tools.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eSimple installation\u003c\/strong\u003e: Can be fastened with screws, adhesive, or nails to walls, ceilings, floors, and vehicle interiors for quick application.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eNon-toxic, odor-free material\u003c\/strong\u003e: Made from a recycled vinyl blend intended for long-term use without persistent smells or hazardous emissions.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e: Suitable for homes, studios, offices, cars, RVs, and light commercial environments where airborne noise reduction is needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is aimed at homeowners converting bedrooms or home offices, musicians and podcasters building or treating small studios, and vehicle owners wanting to reduce road and engine noise. The roll format and flexible material make it practical for installers who need to cover irregular surfaces or retrofit existing panels.\u003c\/p\u003e\n\n\u003cp\u003eThose who should look elsewhere include buyers seeking full thermal insulation solutions or contractors needing a complete multi-layer sound isolation system; MLV adds mass but does not replace dedicated decoupling or absorption layers in high-end studio construction.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eHigh mass per ft reduces airborne sound effectively when added to common partitions.\u003c\/li\u003e\n \u003cli\u003eFlexible vinyl construction is easy to trim and conform to curves without tearing.\u003c\/li\u003e\n \u003cli\u003eNon-toxic, odor-free composition makes it suitable for indoor and vehicle use.\u003c\/li\u003e\n \u003cli\u003eMultiple fastening options let pros and DIYers choose screws, adhesive, or nails.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eMLV provides mass but does not address low-frequency structure-borne vibration without additional isolation methods.\u003c\/li\u003e\n \u003cli\u003eAt 4.5 in by 20 ft per roll, larger projects require multiple rolls which adds seams that need careful overlap or sealing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eMass Loaded Vinyl soundproofing roll\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1 LB per sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e4.5 ft x 20 ft (90 sq ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSTC Rating\u003c\/td\u003e\n\u003ctd\u003e26 STC\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eRecycled vinyl blend, non-toxic and odor-free\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eCut with utility knife; fasten with screws, adhesive, or nails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe EnviroFlex 1 LB MLV roll is a practical, cost-effective way to add blocking mass for airborne noise in homes, vehicles, and small studios. It is especially good value for projects that need a durable, odor-free layer that is easy to cut and install, though serious low-frequency isolation will still require complementary construction methods.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this be used inside vehicles?\u003c\/strong\u003e\u003cbr\u003eYes. Its flexible vinyl construction is suitable for vehicle panels and can reduce road and engine noise when applied to doors, floors, or cargo areas.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo you need special tools to install?\u003c\/strong\u003e\u003cbr\u003eNo. The roll can be cut with a utility knife and attached using screws, adhesive, or nails depending on the surface.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs there an odor or hazardous emissions?\u003c\/strong\u003e\u003cbr\u003eThe material is described as non-toxic and odor-free, made from a recycled vinyl blend intended for indoor and vehicle use without persistent smells.\u003c\/p\u003e","brand":"EnviroFlex","offers":[{"title":"Default Title","offer_id":48622241153243,"sku":"B0DT4Y1R8V","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Jq52eT4qL._AC_SL1500.jpg?v=1778507253","url":"https:\/\/gearmusthave.com\/products\/1-lb-mass-loaded-vinyl-4-5x20-90-sf-flexible-soundproofing-roll","provider":"GearMustHave","version":"1.0","type":"link"}