Siliconing a shower: how to seal, waterproof and protect your shower walls and floor

Person siliconing edge of bath/shower with caulk gun and using blue masking tape as a guideline
(Image credit: Getty Images)

There is an art to siliconing a shower, and once you have mastered it you will be left with a smooth, straight finish with crisp clean lines that give your shower a strong seal that is waterproof and will last for at least three or four years.

When fitting a shower it is essential that all the edges around the area are sealed properly to make sure that they are watertight and waterproof. If you don't get the prep or application right the silicone won’t adhere properly to the surface and let in water which can lead to all sorts of problems.

Here we give you the lowdown on what you need to get a great finish.  

Siliconing a shower: Four steps to a watertight, professional-looking finish 

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.