ANSWER: There are many options. Boiling water applies the heat evenly to the band and is not hot enough to melt the band. But you can use any heat source: a hair dryer, heat gun, stove top, etc. You will need to be careful to not apply too much heat or the band could melt.
QUESTION: Can I trim the band?
Answer: Yes, key bands can be cut prior to heating to fit a certain shape better, avoid covering the key hole on a smaller key, or to create a different style/shape.
QUESTION: Can you write on the band with any marker?
ANSWER: Yes, but we recommend the Sharpie Industrial marker. It is the best we have found for writing on plastic.