Darkening glass reduces glare, blocks unwanted heat, blocks damaging UV rays and can be used to create “safety glass”
You can do all these things it says in the summary, but it is important to use the proper film to tint the glass. Improper film or improper installation can lead to either breaking the glass or causing seal failure. Obviously you want to avoid either of those. Some glass should not have a film applied. Contact your local expert, as we are in the Denver area, (for smaller jobs, all over the country for larger projects) to get the job done professionally.