Title: Debunking Misinformation Surrounding Mass Loaded Vinyl (MLV)
Introduction:
When researching Mass Loaded Vinyl (MLV), it’s not uncommon to come across a plethora of information, both accurate and inaccurate. In this blog, we aim to clarify some common misconceptions regarding MLV, ensuring you have accurate information at your disposal.
1. Composition of MLV:
One of the key misconceptions pertains to the composition of Mass Loaded Vinyl. Historically, barium was utilized in the manufacturing process, but advancements in science and production have led to a shift. Presently, MLV is primarily derived from calcium carbonate, combined with proprietary materials as per the manufacturer’s specifications. Any claims suggesting the use of barium sulfate in MLV production are factually incorrect.
2. Sound Blocking vs. Absorption:
Another source of confusion surrounds the sound-deadening properties of MLV. Plain MLV, in its typical form, serves as a sound blocker. Imagine enveloping a room in Plain MLV; it effectively prevents sound from escaping. However, when combined with specific materials like quilted fiberglass, MLV can transform into a sound absorber. Fiberglass is often the preferred choice for this purpose, although alternative absorbers exist.
3. Dual Functionality of MLV:
MLV’s ability to function as both an absorber and blocker stems from its combination with other materials. For instance, products like the SilentCeiling Cap, offered by SAS, leverage a combination of fiberglass and MLV. In this setup, sound waves are initially absorbed by the fiberglass, subsequently blocked by the mass loaded vinyl. Any reflected sound waves further dissipate into the fiberglass absorber, illustrating the absorber aspect of MLV. However, it’s crucial to understand that MLV in its base form (Plain MLV) solely serves as a sound blocker and does not possess inherent sound absorption qualities.
4. Fire Resistance:
MLV is not inherently fireproof and is susceptible to burning. An exception to this rule exists in cases where Mass Loaded Vinyl incorporates a foil facing laminated to one side, allowing it to achieve an ASTM E-84 Class “A” rating. Notably, MLV exhibits self-extinguishing properties, meaning it will extinguish itself once the flame source is removed.
5. Soundproofing for Vehicles:
MLV can indeed be used for soundproofing vehicles, but it’s essential to consider some factors. MLV with higher densities is weightier and less flexible. For vehicle soundproofing, we recommend using sound-deadening products like Dynamat, readily available on platforms like Amazon and other e-commerce stores. These alternatives are more flexible and easier to install, providing effective soundproofing without compromising vehicle performance.
Conclusion:
In summary, Mass Loaded Vinyl is a versatile material with distinct sound-blocking and sound-absorption capabilities, depending on its composition and application. By dispelling common misconceptions, we hope to empower you with accurate information to make informed decisions when using MLV for soundproofing projects.