Hello everybody!
I'm not new to this site, I learned a lot just reading your comments and watching pictures... but I've just joined today because I'm in desperate need of help!
I've seen many video tutorials on how to make a loop bow and I think I got the instructions right. But, yesterday I made one loop to try it and today it's still soft!!
I used fondant, I don't think I might be able to get some gumpaste here in Mexico. I do have however, a container of Wilton Gum-Tex. I bought it one day from a store that sometimes imports this kind of stuff. I was told that I could add it to fondant to make it harder but.... will it work?
I have to deliver a cake on Saturday with a loop bow and I'm sooo scared!!

Yes, it will work. It might take 24 hours to dry, but it will help to harden it.

If you cant get tylose then the wilton should be ok. I have read it is not as strechy as using tylose, but it will harden your fondant which is waht you need

Straight fondant loops can take a week to dry. Fondant isn't really made to create bow loops with. Gumpaste is ideal, but a very good substitute is 50/50 - 50% gumpaste + 50% fondant. The mixture retains some workability from the fondant, but will dry hard from the gumpaste. Knead the dry W Gum-Tex right into the fondant. I can't tell you exactly how much, but it will work.

Thank you everybody, you are so nice!

Unfortunately, I'm running out of time and just for this time, I gave up. (I added the GumTex and it was still soft after another 24 hrs, I guess humidity is a big issue in my city or, as Leah said, it will take a week to harden).

I ordered a clay bow just so I can deliver the cake this Saturday... shame on me, I know, but I'd rather explain to my client why she will be able to keep her bow forever than tell her that I couldn't bring it

So, I REALY need to learn how to make gumpaste, since I can't buy it. Time to surf through these forums!!

Thank you so much!