grape seed oil is great, aprecot oil, argan oil is good as well. all of these you can use to seal and to add to a DT. you have to try different oils your self, cause every one reacts differently to different oils. try light oils first.

my hair: 3b, high porosity, high density and coarse hair (i think i finally figured that all out)
my hair loves conditioner only styling!
Oils and my own procuts are my hairs best friend
my hair goal length is bra strap length when curly.