It is rated for application onto fiberglass and other plastic surfaces.
How to fix a oval glass plastic door molding.
Do all four sides.
Lay the tip flat on the glass and push the tip of it under the molding rock it back and forth if necessary to get the tip to penetrate under it.
How to replace the oval glass in an entry door.
3 cut the tip off a tube of clear silicone glue using a craft knife.
Insert the tip of a putty knife between the molding and the frame of the door.
When the molding lifts up 1 4 inch move the screwdriver to the next side.
Once dry it may also be painted.
If you choose repair over replace try fixing the damage with j b weld waterweld epoxy putty.
Use a nailset and a hammer.
How to replace the oval glass in an entry door.