Products used:
Garnier Fructis Anti-Frizz hair serum
Wet n Wild Clear Nail Protector
Thanks to Riley Ramsingh @damningeden for sharing this tip!
Disclaimer: use at your own risk, and I wouldn't use expensive polishes for this. Use cheap polishes you can replace easily and don't mind ruining in case it doesn't work.

Ingredients of Fructis Anti-Frizz hair serum: Cyclopentasiloxane, Dimethiconol, Parfum/fragrance, Argania Spinosa kernel oil, Prunus Armeniaca kernel oil, Hexyl cinnamal, benzoyl alcohol, linalool, amyloid cinnamal

If you can't find this specific product, I would look for a product with the first two ingredients high on the ingredient list. I have always heard that any ingredient after the fragrance is not significant.

Polishes also used for fluid art:
Barielle Lemondrops
Barielle Banana Drop
Sinful Colors Sugar Pumpkin
Sally Hansen XW Wet Cement
Born Pretty Store mini mat item ID=43717 #prsample