Basically, the claims need to be backed up by evidence (at least, some sort of lab test results) to show that it can reduce glare and space temperature for a given time period for specific room area. There must be evidence of recognition by the relevant bodies.
It looks suspiciously like the car tint film that you can buy from car accessories shop. It might block the glare from the sun and cool the space initially, but the film itself might deteriorate with time.
Reducing glare and cooling loads in the building are basically design issues that can be tackled during the planning phase, e.g. the orientation of the buildings, the window-to-wall ratio required.