![]() STC is defined as how well a structure isolates sound. Perhaps the only way to really compare the 2 products is to understand their sound transmission class (STC). They both cover different aspects of the key principles of soundproofing. MLV adds mass while Green Glue dampens vibrations. Obviously, the greater the mass the more it’ll prevent a surface from vibrating.Īs you can see, it’s not really possible to compare MLV and Green Glue because they both perform different functions within soundproofing. Generally, you’ll find 0.75lbs, 1lb, and 2lb versions. MLV’s mass is measured in pounds per square foot. It’s a popular choice for soundproofing walls, floors, and ceilings, and comes in several weights. This is a benefit because the more mass a structure has the less it can vibrate anyway. ![]() This essentially blocks sound waves from passing through a structure.Īlso, MLV simply helps to add more mass to a structure. In short, limp mass doesn’t vibrate when sound waves make contact with it. MLV is what’s known as limp mass, which you can understand in more detail by watching this video. It’s very flexible, but it’s also very dense and limp. It does this pretty well, which is why it’s a popular choice. In a soundproofing project, you should use plenty of Green Glue on surfaces to reduce the level of sound transfer through a structure. This happens because the sound waves make contact with the product and expend their energy trying to make it vibrate.Īs energy can’t be destroyed, it’s converted into heat energy instead. Much like acoustic foam, Green Glue converts sound waves into heat energy. ![]() In turn, it prevents vibrations from passing through a structure because they can’t make the product vibrate. It does this by never fully drying, meaning it retains a level of elasticity even after it’s fully cured. It’s used for dampening vibrations before they become sound waves. Green Glue is a viscoelastic compound, similar to caulk. ![]()
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