On Mar 10, 1:33*am, "trs80" wrote:
I have about a 8' x 4' skylight with opaque white plastic dome. *It has 3
cracks radiating out to about 1'. *its intact, just cracked. *Probably the
wind blew a pine cone into it.

How can I go about repairing it? *The dome is not viewed from inside the
house as there is a colored glass inset in the ceiling. *I was thinking
contact cement and laying a flexible membrane over the cracked area that
would withstand the weather and UV. *I visited Lowes but saw nothing like
that. *It would be great if the membrane was translucent but not critical.
Any hints appreciated on how to go about this repair.
thanks!

Use clear silicone if it will stick to the plastic. Were it mine I
would drill holes about 1/8" in diameter at the ends of the cracks to
provide stress relief and prevent the cracks from propagating farther.
Watch out for organic solvents as they degrade many plastics.