I am looking for a way to completely black out a window without

You mean something like that?

https://www.amazon.com/Blackout-EZ-Window-Cover-Large/dp/B006S65GAE

>>338875
That looks perfect, I am a bit iffy with attaching anything tape to the window itself at the moment, I was hoping there would be a shade that was made specifically for this that I could install on my existing shade mount if possible, will definately look into this though.

>>338903
Then use some black window film.

It glues straight to the glass, and it's impossible to fuck glass up.

I recently removed some after filming my window with it years ago (working the breakfast shift so I needed to get to sleep at 18:00), and the glass was perfectly fine.

Didn't even leave any adhesive behind, but if it had, label remover would have dissolved it without harming the window.

Take your time applying it, use the soapy water technique, and don't use anything metal when peeling it off, and no-one will ever know it was there.

>>338921
got any links? last time I went to a home depot looking into this it was mylar film that didn't really do its job.

>>338924
I'm not from burgerland, but I imagine you can get some off eBay.

You'd be surprised how much light a simple black cosmetic film will block. If you're actually trying to make a darkroom (you didn't say), just use two or three layers. You'll see significantly less heat ingress if your bottom layer is a reflective silver one.

>>338927
Not so much a darkroom, just I keep odd hours, sometimes i'll be asleep at midnight to noon, sometimes i'll sleep from 2pm to 5am

I don't handle light shifting from light to dark or the other way well, it usually wakes me up, and I don't fall asleep with lights on, I pass out, there may not be much of a difference there, but its a big one to me.

>>338943
For me, one layer of black and one layer of silver got me at midday a very dark, very deep red. It was possible to see by, but only just. I fucked up the install and left a bubble, and then when I poked it with a pin the shaft of light coming through looked blindingly bright. This is all subjective, but my experience was that sticking a poster on top made it completely impossible to tell night from day.

>>338943
This kind of thing. https://activewindowfilms.co.uk/77-total-light-blackout-100-privacy-window-tinting-tint-film-51-76-100-152cm.html