Preferably something of a reputable brand. I've had bad experience with hot irons and I want to protect my hair this time around. Thanks!

GHD make their own spray, designed specifically for this
its great, leaves your hair nice and shiney without any stickiness at all, well worth sourcing

l'oréal makes one for straighening [hot straight] and curling [hot curl]. they both come in pink bottles, but i think they're only in salons. ghd brand is meant to be awesome, again, only in salons. as for regular stores, try TRESemmé. they're salon-quality

try tresemme. its special straightening gel and da heat protect spray. dey are awesome. i use em everyday. dey come in a black and red bottle and are at most stores four about $5 each

my roommate swears by Biolage straighening serum stuff. Her hair is always gorgeous. I kinda wish my hair wasn't already stick straight so I could use it. lol