Air dry clay will stick to plastic. You can use some water in order to make the air dry clay stick better to the plastic surface. The air dry clay will continue to stick to the plastic surface even when it has dried.

What surfaces does air dry clay stick to?

Most air dry clays are sticky, and you don’t want that on your work surface. We recommend protecting the work area with items such as wax paper, silicone baking mats, or vinyl placemats. This will keep your table protected and make clean up much easier!Mar 8, 2018

What surfaces does clay not stick to?

Generally speaking, to avoid that, you should stay away from textured surfaces (unless, of course, texture is a part of your project). Polymer clay has an affinity for sticking to metal, wood, polystyrene and polycarbonate plastic. So keep your pieces away from such materials.