Sealing a bath with silicone to get a watertight finish

Sealing a bath with silicone and a caulk gun next to brown tiles
(Image credit: Getty Images)

No-one wants water dripping through the ceiling so sealing a bath is crucial to keeping it watertight and stopping any unwanted issues elsewhere. To make sure that this happens you will need to choose the right silicone. Look for a sanitary or anti-mould sealant that's specifically tailored for such a job.

You will also need a caulking gun to apply the silicone, and remember you will need to smooth and shape the silicone quickly. This isn’t a job you can leave for half an hour and come back to. You need to sort the silicone almost as soon as it is applied.  

Sealing a bath: A step-by-step guide 

Steve Jenkins

Steve Jenkins is a freelance content creator with over two decades of experience working in digital and print and was previously the DIY content editor for Homebuilding & Renovating. 

He is a keen DIYer with over 20 years of experience in transforming and renovating the many homes he has lived in. He specialises in painting and decorating, but has a wide range of skills gleaned from working in the building trade for around 10 years and spending time at night school learning how to plaster and plumb.

He has fitted kitchens, tiled bathrooms and kitchens, laid many floors, built partition walls, plastered walls, plumbed in bathrooms, worked on loft conversions and much more. And when he's not sure how to tackle a DIY project he has a wide network of friends – including plumbers, gas engineers, tilers, carpenters, painters and decorators, electricians and builders – in the trade to call upon.