Cowboy Magic is a silicone-based conditioner that contains no water. It works wonders for Bella's mats. It's rather expensive, but a little bit goes a long way.
Here is a Yorkietalk thread on this subject:
http://www.yorkietalk.com/forums/yor...boy-magic.html
Here is the link to the product website:
Cowboy Magic Grooming Products Cowboy MagicŪ Detangler & Shine