Conservatory furniture

[anybit]

We have a manky old conservatory that due to COL we cannot replace, quotes are insane. Any furniture or fabric tends to go moudly as it's not air tight and leaks in places..any recommendations for plastic etc furniture for it that won't break the bank please. Just a sofa type thing to sit on, we mostly use it for DD play room in the warmer months.
I think even rattan would go moudly.
I'm drawing a blank.

I’m not sure anyone can help. I have a conservatory in both my current and previous house. Nothing goes mouldy in there, just very faded from the sun. I have rattan furniture with outdoor cushions.

I would buy outside furniture, so basically the "plastic rattan" stuff with outdoor cushions. We've got it outside and it has been out all winter with no damage (cushions were inside).

Is there any way you can use plastic sealant to improve the air tightness/ reduce leaks a bit?