Mavala thinner for nail polish. Mavala thinner for nail polish it restores the ideal consistency to nail polish and allows its application in thin layers. Indeed, two thin layers of varnish hold much better than a single thick application that flakes frequently after two days already. Perfect for maintaining a healthy nails and all its consistency. If you have already tried our product, please leave your opinion in the comments. Before applying the nail polish, check its consistency. If the varnish is considered too thick, add 2 or 3 drops of diluant and shake vigorously the bottle. Let the diluted varnish rest for 20 minutes.