Kathlene Freitas of Aurora, Colorado, asks, "What can I use to repair my plastic birdbath that has a crack in it?" We applaud ...

The best plastic welders are user-friendly tools that form strong and permanent bonds to fix a whole host of plastic items.

Takuzo Aida, a chemistry professor at the University of Tokyo, and his colleagues said a tiny amount of a specialized agent mixed into ordinary plastic can automatically heal cracks and fissures.