Lexan/Polycarb windows

My mate works for a vehicle glass company, he says they have tried all sorts of "specialist" sealents and the likes, but he said the best thing he has used is tigerseal, it's strong as and has a slight flex so doesnt crack or anything as it ages, so leaks aren't likely, says he has fitted polly windows with them on track toys and has used it to bond on proper windows too

Where are you getting your polycarbonate from mate? I heard of a place near Nottingham that was very high quality, to a point where he Guaranteed you wouldn't tell the diff looks wise between the poly and glass!

Tempted to do my rear screen to rid of the heated screen ugliness!

Tigerseal is good stuff. A bead of sealant and a few rivets or button head screws seems to be the norm with race cars, although an increasing number seem not to be bothering with the rivets/screws.

I'm guessing you'll just be buying the sheet and making the windows your self, but there's a chap in Weston who specialises in polycarbonate windows for cars, I had a chat with him a Combe a while ago and he seemed good, really nice guy and willing to help out where he could. I'll try and find his card.

Just found it, it's ACW Motorsport Plastics, like I said, very nice guy and seemed keen to expand his range of off the shelf windows, iirc he said there'd be no extra charge to do my mini estate ones as long as I gave him templates/the original glass.

as above, 4mm min for MSA events.

What I have seen used which makes sense is nylon fasteners plus stuff like tigerseal, less chance of cracking as you'd have with steel fasteners and you'll still be able to kick them out if needs be!

Tigerseal on its own will hold them pretty securely tbh!

I've got Lexan Margard windows all around on my Toledo.
I personally wouldn't go down to 3mm, I'd imagine too much flex. With the 4mm that I have, I was able to use the standard rubbers.
Also, polycarbonate will scratch a lot, every time you wash them, even when you are very careful, so I would highly recommend the lexan margard if you can stretch to it.

Another vote for tiger seal here i once glued my trousers to the side on my camper with the stuff whilst fixing the blue lights back on the ambulance (DO NOT wipe your hands on your cloths if you get any on your fingers then lean on the car for any long period of time) !!! i had to climb out of em and drive home in me boxers

Ta Rob, that makes me feel less silly about the time I used Tigerseal to fix a leaky boot (while wearing it) and ended up gluing the boot to my sock, and the sock to my foot

Where did you get those made?

I have 3mm quarters in the original rubbers at the moment, and tbh they are too thin. Very flimsy, and add to the in-car noise. The wobblyer they are, the more lower frequency noise they add (bassy boomyness).
There is jolly pain in the backside all weight difference (you're talking grams) between 3,4 and 5mm of that size, I'll go for for if not thicker when time comes to replace them (they scratch easy!).
Also, if you're riveting them, then the flimsyness of the 3mm stuff might wave the edges if your rivets aren't close enough together, as tigerseal is very tough and not very squishy in the areas between the rivets.
I'm not sure if i'm explaining properly. Do you know what I mean?