I buy my molding compound at "hobby lobby" for 15, but that's because I always wait for a sale. You can wrap a rubber band around the silicone mold to hold it together, that has worked well for me in past.
Last edited by Pock63
on Wed Jul 18, 2012 7:11 am, edited 1 time in total.
You'll be lucky if you're one of the few to find someone who can tolerate you.