It's a 10Miracle Leave-In plus Keratin Spray 2 oz by It's a 10

Q: is this spray for wet or dry hair?

this spray can be used on wet hair and then style as desired. I have also sprayed dry sections of my curly hair, before blowing out w/a large round brush using a blow dryer....so, either way, it's a great product!

Q: Is each one a 4 oz bottle in this pack of 2, or is 4 oz the sum of two 2 oz bottles? Just making sure..

Each bottle is 4 oz. The two bottles equal 8 oz. total.

Q: will this help hair growth on scalp??

Try taking "Saw Palmetto" supplement pills. It's usually recommended to men for their prostate health BUT it also works to stimulate hair growth in women & men. Helps with thinning hair in the part area, bald spots at crown, & receding hair lines on forehead areas.