Iron-On Hem Tape - I'm not sure if it's the tape I bought, but it only seems to be sticking one side. When it didn't work on my curtains, I tried it

SY Iron-on hemming tape - IKEA

Adding Pom Pom Trim To Your Curtains - Exquisitely Unremarkable

How to Add Curtain Trim Tape for a Custom Look - The Turquoise Home

Ideal in a pinch Great for travel Great for hems and rips So easy, place between fabric, iron and you're done The fabric is secure, remains elastic

Iron ON Hemming Tape

How to Lengthen Curtains That Are Too Short - Love Grows Wild

Glueing on backing fabric : r/Tufting

Curtain Backing DIY and How To - Thistlewood Farm

Hanging Curtains All Wrong - Emily Henderson

How To Hem Curtains (2 Ways) WITH Or WITHOUT Sewing ⋆ Hello Sewing

Curtain Track as a Ceiling Mounted Shower Curtain Rod - Erin Zubot Design