Our PVC windows have a black mould on the internal sealant within the kitchen and bathroom and an unused bedroom. I have tried the stuff for cleaning the PVC frames but there is no chemical in my armoury that gets rid of the black mould that is on the white silicon sealant only off the frames. You name it I have tried it even surgical spirit, IPA (industrial propyl alcohol not the beer ) , methanol, cellulose thinners, white spirit et al. Do I have to get it stripped off and redone with a mould resistant sort which the cheapskates should have used to start with ?.
Hi, have you tried Dettox mould and mildew remover. I find this usually works. You may need to use it more than once though. If that doesn't work then I would say to remove it and put new on. Good luck.
Hi, forgot to say you will nearly always get some mould on the sealant after it has been there for a while especially in bathroom as it gets quite wet in there even if you open windows regularly. Even the sealers that say they are mould resistant will get it on eventually.