3D Water Drop Gel Top Coat Set 2 15ml - No Wipe | Raindrop Bubble Effect How to Use: Apply your chosen gel color and cure for 30 seconds. Apply Water Drop Top Coat Step 1 evenly, then cure for 60 seconds. Apply Water Drop Top Coat Step 2 in your desired pattern; wait a few seconds for droplets to form, then cure for 60 seconds.