Glueing perspex

[Nimrod103]

I have just discovered a small crack in the corner of a window of my caravan. I assume the plastic window is perspex, though I am not sure.
Can anybody recommend a glue I could put into the crack to weld it? It would probably have to be a very fluid solvent.

[DrFfybes]

There are numerous glues and fillers available - from experience the 2 part ones last longer.

Once it starts to crack, it is very difficult to contain it. I've seen small cracks on bike screen develop very quickly on race bikes (mainly on the TT circuit, where forceds are quite high), and we used to drill 5mm holes at the end of the crack to reduce the stress point and stop spreading.

You need to work out what started the crack - if it was a stone chip or similar then a repair is OK, but if it is from flexing of the caravan or vibration then it will spread and the best option (apart from replacement) will be to drill the ends to relieve the stress and then widen the crack to get adhesive/filler in or patch over. For a thin patch I've used a bit of CD case in the past to brace repairs in car window switches and light clusters.

Paul

[servodude]

CA glue will work as an adhesive (and you can get thin superglue that will wick)
You probably want to drill out any exposed end of the crack and check what forces are being applied that could cause it to tear

EDIT: Paul's suggestions are better than the agricultural stuff I've given above (which is where I've had to deal with crappy Perspex)
-sd

[BullDog]

As the window is already cracked, the usual way to stop a crack from growing is to drill a smallish hole through at the very end of the crack. Then use the two part filler like you were going to anyway. Without doing that, the crack is highly likely to keep just getting bigger.

[88V8]

I have just discovered a small crack in the corner of a window of my caravan.

Perhaps you could stick a length of this over it and pretend it has leaded lights.

V8

[NearlyThere]

I have just discovered a small crack in the corner of a window of my caravan. I assume the plastic window is perspex, though I am not sure.
Can anybody recommend a glue I could put into the crack to weld it? It would probably have to be a very fluid solvent.

If it is perspex, Chloroform will work. Don't think you can buy it over the counter though

[Mike4]

Try "Captain Tolley’s Creeping Crack Cure".

Yes honestly, it's a thing!

Commonly recommended and widely respected in the world of canal boating, although I have never tried it myself.

https://captaintolley.com/

[richlist]

Wow. It's not often I'm impressed & it takes a lot for me to be amazed but this is one of those rare occasions when I'm both. I gotta get some of this stuff. Incredible!

[quelquod]

Try "Captain Tolley’s Creeping Crack Cure".

Yes honestly, it's a thing!

Commonly recommended and widely respected in the world of canal boating, although I have never tried it myself.

https://captaintolley.com/

Been on the go for donkey’s years and available in every caravan accessories shop the length of the country. I’ve used it several times on caravan ‘bubble’ double glazing with great success.

[stewamax]

Another rec for Captain Tolley’s Creeping Crack Cure.
Works fine on hairline cracks - just seeps into them. Less good on any larger crack that you can get filler (e.g. epoxy or polyester resin) into.

[tjh290633]

Methylethylketone (MEK) is very good solvent for many thermoplastics, widely used my assemblers of polystyrene models. Getting some to infiltrate the crack may work.

TJH