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