Think of this stuff like a glue/sealant! Use clear nail polish on top of buttons to keep the thread from unraveling, over those tiny screws on your sunglasses to prevent them from falling out, to seal an envelope, to coat the inside of cheap jewelry so it
Cut a slit into a toilet paper or paper towel roll to make a wrapping paper cuff! (keeps the paper from unrolling everywhere). For smaller rolls, you may have to put a piece of tape on the outside of the toilet paper cuff to make it fit.