Remove and replace sealant

modelreject

Hi,

I am off today and need to get some advice on removing and replacing sealant as I will be making a trip to BandQ.

There is mould in the sealant around our PVC frames. I want to remove the mould and reseal using the best antimould sealant.

Can someone please advise on technique and products. I assume I need some sort of silicon eater to get rid of all sealant, but it has to not harm the PVC.

Many thanks,
C

Alter_ego

Silicone remover is slow and inefficient, only use it for the final clean up, if at all.
I assume you refer to white frames, I would use mould resistant bathroom sealant.
Technique can only be learned by experience, but there is a lot to be said for a wet finger.

modelreject

The unibond bathroom antimould states nit to use on upvc. Why is this and should I use it anyway. I can see no other antimould apart from bandq's own. Thanks.

Alter_ego

I think that over time it will discolour UPVC, I've seen a sort of light brown appear on it after a year or 2.
I don't think it attacks UPVC but you could experiment on an unseen part.

mchale

Dow Corning silicone: top stuff

keystone

modelreject wrote: »

I can see no other antimould apart from bandq's own. Thanks.

Go somewhere else then.:D

Remove old stuff with old blunt chisel and window scraper/stanley knife. Anything thats left should rub off with your finger.

Sealant remover is a waste of time.

Earlier poster is correct Dow Corning is the dogs whatsits.

Cheers

modelreject

Job done. Finally found some anti mould silicon by unibond that I could use in uPVC. Thanks for all your help!

dander

I found the no nonsense silicon remover from Screwfix to be very good - and it hasn't harmed my upvc windows. Sliced most of the silicon away with a knife and the silicon remover made the left over scraps peel away easily. Stunk to high heaven though. It's a bit non-commital on the packaging as regards plastics though - it just says test first.