Mass loaded vinyl is a soundproofing material, which was first introduced into the noise industry to replace the lead sheeting. The lead sheeting is old soundproofing material, but it is well known that lead is identified as a toxic substance that needs to be found in alternative products.
The mass-loaded vinyl soundproofing material is made from a combination of rubber and other materials. This combination gives a set of features similar to the original cheap soundproofing material lead sheeting, but without potentially dangerous side effects. The purpose of mass loaded vinyl is exactly the same as its name. It is used to add mass to a wall or ceiling, making it the best soundproofing material and harder for sound to pass through.