I have some windows made up of 4 x 4 smaller panes of glass similar to these: <http://unleashapp.co/eashp/>. On the inside there is crazy condensation issues for obvious reasons on a single glazed windows. It's a grade 2* listed building so I cannot do anything to replace the windows but I can repair the inside, which I have done however. With winter incomming, the gloss paint has already shown signs of letting the water under it, unding all of the work I've done. Is there something I can put on the frames to fix them and make them completely water proof? The repairs took a while and I don't fancy doing it every spring.
Thanks.