From a post by Fred Ficarra :
Hunter used Plexiglas so I did the same with the replacement on my H34. You could try glue. (actually solvent) Just ask the 'plastic store'. My vendor gives small cans away for free. It's the same solvent used to build all those plexi products you see in stores. Easy to do. I tried it on a crack on my slider and didn't like the results so I just replaced it. But on the H34, 'just' replacing it is not going to happen. First you have to lift the sea-hood. It has to rise high enough so as to get a screw driver under it to remove two screws that secure a travel stopper. The stopper is just a piece of teak. But the screws have to come out or the slider won't move rearward in its' aluminum track. Plan on removing the sea-hood ENTIRELY and re-bedding it. That means the traveler has to come off too. But only two bolts hold it down to the cabin top. Remove the end stops and you'll find 'em. They MUST BE REMOVED or the sea-hood and thusly the slider, stays put. Big job dude. Just remember to remove ALL of the old silicone or the new stuff won't adhere. Again, big job dude. Oh, don't be dropping that boom! Get a Boomkicker.