Mamas, if you haven't tried the juice i'd recomend that highly. It has given me moisture and retention. I also use the ORS Olive Oil (both product are staples and I am NEVER without them - EVER)
Also you might want to try moisturizing hair and keeping it wrapped up. (I stay wrapped while indoors. I'm serious, people come and hang out at my house and I have my wrap on like, So?) This helps keep the moisture on my hair and not in the air.
I haven't tried sealing yet.........But from what i've seen other ladies post, It's not a bad idea if retention is a concern. Hth.