Without the holding agent, the enamel is going to blow all over from your torch. The flame really does have more than heat going on.
I mix this with an equal amount of water and put it in a spray bottle. It's easier than painting it on when I am doing a larger pice. However, when I want to get lines or sections, I will paint it on and enamel section by section.
It's a low cost product that makes enameling even easier.