The only exception to this would be Mass loaded vinyl that has a foil facing laminated to one side does receive an ASTM E-84 Class “A” rating. The material as manufactured (plain MLV) does not absorb sound waves it only blocks them.
Any reflected sound waves will further dissipate into the fiberglass absorber, and this is the only way MLV acts as an absorber. For example, the SilentCeiling Cap sold by SSP works on the principle that sound waves originating from a source will be initially absorbed by the fiberglass and then blocked by the mass-loaded vinyl. When combined with other materials it can do both.
How does MLV act as both an Absorber and Blocker? However, fiberglass is often the most common material of choice. There are other materials that can be used as an absorber. Fiberglass is not the only absorber available. The fiberglass is laminated to the MLV to create an absorber/decoupler product. The most common material used as the absorber is quilted fiberglass. Plain MLV, when combined with other raw materials, however, can become an absorber. Imagine wrapping a room in Plain MLV the MLV will block any sound from escaping the room. Plain MLV as manufactured is a sound blocker. Any article that states that barium sulfate is used in the manufacturing process would be factually incorrect.Īgain, I have seen articles and blog posts saying that it does both, but that is not factual. Today, due to advances in science, production, and manufacturing, MLV is now processed from calcium carbonate combined with other propriety materials based on the manufacturer. When the product first hit the market decades ago, barium was one of the raw materials in the manufacturing process. The first thing I would like to address is the Mass Loaded Vinyl composition. What material is used in the Manufacturing of MLV? In this blog, we discuss some of the common misinformation on Mass Loaded Vinyl. Googling the phrase “Mass Loaded Viny’ will yield tons of results, photos, and also with that a ton of misformation on the product.
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