To effectively attach polymer clay to plastic, you should use a suitable adhesive or, for the strongest bond, incorporate a method involving baked polymer bond.
When joining polymer clay to plastic, selecting the right adhesive is crucial to ensure a durable connection that doesn't become brittle or detach over time. The properties of both materials, especially the flexibility of polymer clay, dictate the best approach.
Choosing the Right Adhesive
According to the reference provided, using glue is a common method, but not all glues are suitable:
- Flexible Glue: You should always use a flexible glue with polymer clay. This accommodates the slight flexibility of the clay after baking.
- 2-Part Epoxy: Many 2-part epoxy glues work well for attaching rigid materials like plastic to polymer clay. They form a strong, rigid bond.
- Avoid Cheap Superglue: Steer clear of cheap superglue in the little tube (it's crispy and brittle), as this type of glue can create a weak, easily broken bond with polymer clay.
Here's a quick overview of adhesive options:
| Adhesive Type | Suitability for Polymer Clay & Plastic | Notes |
|---|---|---|
| Flexible Glue | Good | Accommodates clay's flexibility. |
| 2-Part Epoxy | Good | Strong, rigid bond; many types work. |
| Cheap Superglue | Poor | Brittle and crispy; avoid. |
| Baked Polymer Bond* | Best | Creates a fused connection. |
*Note: Baked polymer bond isn't a glue, but a technique described below.
The Best Method: Baked Polymer Bond
For the most secure and robust connection between polymer clay and a rigid material like plastic, the reference states that the BEST way to glue anything rigid to polymer clay is to use a baked polymer bond.
This method involves applying unbaked clay to the plastic piece and potentially using liquid polymer clay or polymer clay adhesive to help fuse the two surfaces. The entire assembly is then baked according to the clay manufacturer's instructions. During baking, the polymer clay hardens and forms a strong, sometimes fused, connection with the prepared plastic surface.
Important Considerations for Baked Polymer Bond:
- Plastic Type: Not all plastics can withstand the temperatures required to bake polymer clay (typically 275°F - 320°F / 135°C - 160°C). Ensure your plastic component is oven-safe.
- Surface Preparation: Roughening the surface of the plastic can significantly improve the clay's ability to adhere during baking.
- Support: Ensure the plastic piece is adequately supported in the oven so it doesn't warp or melt.
While adhesives can work for many applications, the baked polymer bond method provides a more integrated and durable attachment, making it the preferred technique for long-lasting results when possible.
