Your Base Coat and Colour Coat should remain a little sticky after curing, so that when you apply the following layer it sticks to the layer below. As long as you are applying your polish in thin, even layers and curing for 60 seconds, your Base Coat and Colour Coat will be cured. Unlike the Base Coat and Colour Coat, your Top Coat layer should be hard, dried and perfectly cured once you have placed your nails under the UV/LED Gel Nail Lamp for 60 seconds.