Silver foil on office windows?

[what..the?]

I'm wanting to fit this my office window, to make the office private (hugely overlooked) and to reflect sunlight/heat.

I have loads of questions if anyone can give me a low down that would be great!

What is this 'stuff' called, how is it fitted, how does it work, are there different types, how much does it cost to fit per sq 'what have you' and how long does it take to fit???

Many thanks in advance

Have a good day!

[what..the?]

Thanks zacsmaster I am looking it up as I speak!

[vehelpfulguy]

I think you have to be careful fitting this stuff to double glazed units.

It reflects the heat back inside the sealed unit, making it hot and they can I believe crack or explode if they get too hot.

[what..the?]

Thanks vehelpfulguy, the windows at the office are just single glazed it is a old building you see, so we should be fine, another office below has this stuff and they seem fine.

Nice of you to warn me I would hate to find this out after I had fitted it to a double glazed. Maybe it will make other people who have double glazed aware.

Top tip thanks.

[what..the?]

Thanks for that zac I will check.