Anyone have experience of making VHF antennas with non conducting booms?

I think I ought to be able to employ a non conducting boom for a yagi design
that is no more than about 50" (1.27 meters) in length. Must have sufficient
rigidity.

I was thinking about using a square boom made out of some synthetic material
(NOT wood). Obviously tthe material must not degrade over time in an
outdoor environment.

Thanks if you can suggest a product.