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100% recycled vinyl materials
Laboratory tested STC ratings prove effectiveness
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Mass Loaded Vinyl (MLV) is a dense, flexible barrier material used to add mass to walls, ceilings, floors, enclosures, pipes, ducts, and vehicles so less airborne sound passes through the assembly.
Mass Loaded Vinyl is a dense, flexible sheet material that adds mass to walls, floors, ceilings, pipes, and vehicles to help block airborne sound transmission.
EnviroFlex™ MLV is made from recycled vinyl and shipped manufacturer direct.
Sound is vibration. Adding dense mass makes a wall harder to move, helping reduce sound transmission to the other side.
These products solve different problems—acoustic foam cannot block sound through a wall.
Prevents sound from passing between rooms by adding mass.
Reduces echo inside a room. It does not block sound from entering or leaving.
The standalone STC rating is the starting point. A complete wall assembly performs significantly better.
Bare stud
wall
Drywall
both sides
Insulation
added
1LB MLV
layer
2LB + RC
channel
ⓘ Assembly STC figures are illustrative. Actual performance depends on full construction specification and installation quality.
MLV can be installed inside wall, floor, ceiling, vehicle, and pipe assemblies.
Sound is vibration. A lightweight wall vibrates easily and transmits that vibration to the room on the other side. MLV adds dense mass that resists vibration — significantly more energy is required to move a wall with MLV than one without it.
The special formulation of MLV, which combines recycled vinyl materials with recycled inert materials, results in a dense but flexible soundproofing sheet that blocks sound transmission.
While the density of MLV helps block sound transmission, the flexibility of the vinyls sheet also helps improve its sound blocking capabilities.
Project guide
Goal: Peaceful sleep
Use MLV to block unwanted sound from your living spaces, including your bedroom,. bathroom, kitchen, and more.
Goal: Secure Conversations
Increase efficiency and prioritize privacy with MLV to soundproof offices, conference rooms, break rooms, and more.
Goal: Enjoyable Ride
Block road noise and engine noise during your drive with heavy-duty MLV that can go in doors, floors, trunks, and compartments to increase acoustics.
Goal: Maximum Entertainment
Create a more enjoyable entertainment space with Mass Loaded Vinyl that stops sound from interrupting your enjoyment.
Choose a manageable roll size for smaller projects or larger coverage for better square-foot value.
Use this section to answer the practical questions customers ask before ordering, cutting, installing, or choosing a product option.
Choose based on the surface, fitment, size, pattern, thickness, and performance level needed for your project.
Most rubber sheet, roll, mat, and barrier products can be trimmed with a sharp utility knife and straight edge. Always measure before cutting.
Common tools include a tape measure, straight edge, utility knife, marker, and product-specific fasteners, tape, adhesive, or mounting hardware where needed.
Confirm dimensions, coverage, fitment, pattern, thickness, and installation method. For vehicle products, verify make, model, year, and wheelbase where applicable.
Tip: Add product-specific FAQ blocks for each category template so the answers match the product being sold.
Compare 1 LB and 2 LB EnviroFlex™ MLV, then choose the roll size that fits your project and handling requirements.
