glad you like it!
Yes, it is a self adhesive vinyl film. It is indeed heat sensitive as it is a thermoplast, so it can be deformed. The film has a "memory", so that it has the tendency to reform to its original shape when heated without applying mechanical tension. So if you heat, the film can be stretched around almost any spherical shape.
The thickness is 70 micrometres. The weight is 200g/mē (paperback included i guess)...
I found a seller on ebay.com so you can get it there. http://www.ebay.com/itm/12-Self-Adhe...item27c58e331a
Demondriver uses this vinyl too if i recall this right. Maybe he has another source.
I hope that i could help you. In any case just ask again