How to get rid of black mould on UPVC window sealant and other window types

A person with pink marigold gloves wipes mould off a upvc window with a blue cloth
(Image credit: Getty)

Black mould on UPVC window sealant or elsewhere in the home should never be ignored. It's unsightly, can produce a nasty smell, damage your windows, and potentially spread across paint, wallpaper, and plaster. It can also cause respiratory health problems. 

Window sealant as well as window putty and other glass fixatives can be particularly susceptible to mould growth due to window condensation making the area a perfect breeding ground, with plenty of food, moisture and warmth.

Sam Webb

Sam is based in Coventry and has been a news reporter for nearly 20 years. His work has featured in the Mirror, The Sun, MailOnline, the Independent, and news outlets throughout the world.  As a copywriter, he has written for clients as diverse as Saint-Gobain, Michelin, Halfords Autocentre, Great British Heating, and Irwin Industrial Tools. During the pandemic, he converted a van into a mini-camper and is currently planning to convert his shed into an office and Star Wars shrine.