Anyone ever try repairing 68 Barracuda tail light lens

So these tail light lenses always break in the inside corners of the white backup portion of the lens. Has anyone ever done a decent repair?? If so clue me in please.
I didn`t repair a broken one, but I sure doctored mine up to look decent !
Have always thot about a thick/white liquid that would set up to pour in the white area, but never came up w/ anything.