Rubber Particle Additive Import RFQ's Rubber Particle Additive Import Companies

We are looking for a company that produces rubber granules used for concrete. We want to apply rubber powder between the concrete in an area of ​​1 million m2 and ensure that it does not transmit sound, in other words, we will use it to prevent sound from entering from wall to wall and the amount will be high, first we want to ask for a price, there is only one thing I know about these products, they are granulated rubber material and they come in sizes from 0 to 10, I want to learn which one is the most affordable from the manufacturer.