Need Help window perf failure

Is there an anti-graffiti film on the windows?

 

This could be the invisible culprit!

 

Are you watching it fall off? or just returning to it on the ground?

 

Glass may be ceramic coated to prevent water spots...

 

Hmmm, test some standard vinyl for 24hrs?

 

That's what I'd do too. Removing any coatings is going to be a pain...https://avalonking.com/blog/how-to-remove-a-ceramic-coating/

 

wow, that's crazy. It literally just fell off, i thought you meant it was like peeling at the edges. It 100% has some type of coasting that doesn't allow the adhesive to activate.

 

You could always run the print on clear, mirrored, then order white back perf, stick both on the inside of the window, and find out if the inside is coated as well...

 

It's obviously a repellent coating. Best to find out from the owner what they had put on the windows.

 

I don't like cleaning the windows with alcohol before I stick anything. It doesn't matter if its perf or calendared lettering. Even the brown masking tape won't stick to no window surface if I cleaned it with alcohol. (denatured alcohol).
I also have an extremely hard time peeling off the transfer tape if I do lettering on windows since it pulls the lettering off too. I use degreaser (diluted 10-1) and it makes everything stick a LOT better. You can also try primer 94 around the edges next time. Also different perf vinyl perhaps?

 

If you are cleaning things before applying vinyl, use isopropyl alcohol, not denatured.

Also, for cleaning windows, you can use acetone. That's what window installers use. However with acetone you have to watch for acetone damaging things it runs onto, like paint and plastic. The same is true of denatured alcohol. It can remove paint.

 

I'm friends with a guy that does window tint, and he pointed me to cleaning windows last with dirt-off window film solution and a window squeegee (no paper towels) to great effect. The last couple windows that I did and had to remove later, I've had to scrape off.
I also prefer to use briteline 65/35 window perf.

 

I’m sure you did but just in case.....

Check your perf. We just had a few areas at the end of a roll where there was no/very little adhesive in very large sections!

Are you on site when they are falling off?

 

In the hundreds of stores I've done perf wraps I've never run into this. I've had them peel at the corners and then later I discovered I didn't get all the "greasy" feeling off.. so I use iso alch. and rub it off which fixes it.

Really weird whats going on with your situation