desiccant.
How do I know it’s misspelled? Because I had to look it up, as I didn’t know what it meant! 
Thanks Johnny L.A., I learned something new today. I never knew there was a name for those little bags of silica gel (other than, of course “bag of silica gel”).
I’m glad Osip said something or I was going to have to be the only one to admit I’ve wrapped a car in plastic wrap as a joke. Incidentally, the secret of doing a professional job is to alternate vertical and horizontal wrappings so the plastic can’t be remored with one cut.