It will melt the plastic and you will have red colored glue.
Best glue for tail light lens.
Take an old plastic lens or a broken lens and put the pieces in a jar with some acetone.
Lens repair headlight tail light.
Install the tail light.
The more plastic you melt in the acetone the thicker the glue will be.
If you use clear turn or parking lite lens you will have clear glue.
Remove the tail light lens using the phillips head screwdriver.
Four screws that go around the perimeter of the lens hold it in place.
Vinyl leather repair.
Once the glue is set and the piece stays in place you can remove your hand.
If the tail light was removed to dry the inside then the tail light will now be reinstalled.
How to glue a tail light lens.
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A very thing bead of it after cleaning the crack with some rubbing alcohol and you probably wont even be able to see it.
Pull out the tail light assembly and remove the bulbs by twisting them out of the sockets with your hands.
There are lots of kits to fix cracks but most of them are for big cracks.
Yours i would get some good super glue i buy the little tubes of gorilla glue super glue.