Quietrail "water-based product" to reduce track noise

It looks as if it's a dampening cladding. Not a new idea in itself (most cars use it in various places, most noticeably on the underside of the bonnet).

Presumably, what is new is that they believe that you can use the product in a 'challenging' environment such as the sides of running rails.

As a "water-based product", presumably it has something that will prevent it from freezing and not working, or worse yet ices up and provides 'black (ice) rail'?

Is this designed to be on benefit to the passenger (quieter ride) or the local residents (quieter noise as the train passes)?

Since the virtual elimination of joints on plain line, railways out in the open have been remarkably quiet anyway; but the row on underground lines, particularly tube lines is spectacular.
As a kid, it terrified me and fascinated me in equal parts. It must be a hazard to hearing, though, particularly to staff over-exposed to it.
It has to be worth a try, this product. looks both affordable and simple to apply.