Mass Loaded Vinyl (MLV) is a polyvinyl chloride, or PVC, that is mass loaded to make it an effective noise blocker. Our MLV Luxury Liner is one of our favorite and most versatile products when it comes to soundproofing. It's great for soundproofing new construction specifically. We make it right here in the USA, and it’s combination of versatility and effectiveness make it one of our favorites.

Product Features

• • Flexible - pliable and easy to manipulate, MLV is designed to easily apply to any wall or wrap around vents and other curved surfaces
  • Tear resistant - while flexible, MLV is still very strong and you won’t have to worry about it tearing and letting sound in (as long as you get good MLV and/or take appropriate installation steps)
  • Odorless – if you find discount MLV, the reason it’s so cheap is that the manufacturer is dipping into chea, impure streams of recycled raw inputs instead of sticking to the good stuff. Bad odors are a common side effect of the “bad stuff.”
  • Fire Rated - many of our customers cover a great deal of their room with our products. Our standard MLV is certified according to FMVSS 302, but we can do Class A fire rated MLV on request. Safety is a top priority so you have peace of mind while installing MLV in your home.
  • Building grade - we recommend MLV for a variety of soundproofing projects because it’s effective and commonly used for both home and automotive use.

MLV is most effective when attached to the studs of the wall. We do not recommend installing MLV on top of, or between layers of drywall. Remember to get 100% coverage between the studs to create an airtight structure, and then seal the seams and perimeter with acoustical sealant and tape. Even though MLV is only ⅛” thick it will add enough density to substantially increase the STC of your wall. STC or sound transmission class is the industry standard method to measure how well a structure blocks airborne sounds (learn about STC ratings here). Depending on which MLV product you use and the exact wall structure, your wall will typically increase from around 30 to an STC rating between 45 - 55. People also use mass loaded vinyl for ceiling applications, and with the right installation methods is great for stopping airborne noise.

Read here for more information on how does mass loaded vinyl work?

Green Glue is a noise proofing compound used between two rigid layers of material, usually drywall or wood subflooring. It can be applied with a caulking gun and helps decouple two layers of drywall, which improves the soundproofing ability of each layer. By putting Green Glue on the back of a 2^nd layer of 5/8” drywall, you increase a barrier’s density and improve your ceiling and wall soundproofing performance. As with and mass loaded vinyl application, you want to seal around the perimeter and and penetrations with acoustical sealant.

One of the reasons we’re such a fan of Green Glue is because it makes it is by far the most cost effective way to soundproof an existing wall. By adding Green Glue and a new layer of ⅝” drywall, you can increase your STC rating into the low 50s without ripping out the current wall.

We hope that we’ve created some clarity around how MLV and Green Glue are used, as well as cleared up some confusion about bad soundproofing advice (like using cardboard for soundproofing). Our goal is to make sure you know the basics, so you start in a good place for your soundproofing project.

If you're curious how much it costs to soundproof a wall we have the perfect breakdown to calculate your project costs and options. If you want to soundproof your windows with window inserts or make mass loaded curtains, we can help with that too! You're only a call away from expert help with whatever soundproofing project you’re trying to tackle.