I have a product I've been using for a couple of years now, and it's great for most hair types. It's great for smoothing edges, holding hair in place, piecing, up-dos and more. The product is by Tigi (Bed head) and it's a pomade stick. I like it because of it's versatility. This product can be used on most hair types. If your hair is fine a little goes a long way. Medium to course hair it is okay to use a generous amount. Keep in mind that it's still product, so it will weigh your hair down if you use too much. Those woman who workout and wear a press or a relaxer, this will be your best-friend. Those edges will not revert as fast in humid conditions nor when sweating from that strenuous workout. Every one of my clients that I use the pomade stick on, falls in love with it. Try it!
You can order this product from a number of sites, it should not be more than $15.
Here's a link http://www.amazon.com/TIGI-Hair-Care-Head-Stick/dp/B000141L58