Tempered glass is not "bulletproof" or anything like that. It's great stuff, until it isn't. Favorite tempered glass story: Many moons ago I worked in what was then the second largest tropical fish
store in the US. We'd just received the latest and greatest fish tanks
, made out of tempered glass. One of the owners set up a 55 gallon tank in the front of the store. Any time a good customer would come in, he'd take them over to the tank, pick up a hammer, and wack the front of the tank. It really was impressive. Every Tuesday night, after we got in a fish shipment, our very best customer would come in. He was... Well, everyone in the world would recognize his name. Lenny couldn't wait to show him. The 2 of them stood in front of the tank, Lenny wacked the tank with the hammer. Yup. Tempered glass only holds up to abuse for so long. 55 gallons of water
poured out of the tank, soaking them both from the waist down. Well, Lenny from the waist down. The dude was huge. Thighs down.
So, no. I really wouldn't recommend it. Cast acrylic
(NOT poly carbonate). If it's mechanically fastened, use butyl tape. If it's "glued" in place, use Dow 795 (make sure it's in-date).
Good info here: www.hatchmasters.com