Nail Polish Thinner Concentrate for thinning of thickened nail polishes 20ML Color: Size: Art. No. Description The concentrate dilutes any nail polish that has become too thick. It can be also used for nail polishes that have become too thick because of extreme temperature fluctuations. Detailed information of the ingredients can be found here: ARTDECO makeup and ARTDECO care Application Add 3-4 drops to nail polish and shake well.