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How to apply bathroom sealant

Sealant being used to fill gaps in a bathroom

Overview

It’s important to seal the joins in your bathroom tiles with silicone to prevent moisture getting behind your tiles. We show you how to prepare the area and apply the silicone.

Steps

1Prepare the tile surface

Before you start, give your tiles a good clean. You want to make sure the area is clear of any dust or debris around the tiles. 

A Bunnings team member wiping clean a bathroom corner before applying sealant

2Cut the silicone nozzle

Cut the silicone nozzle at a 45° angle so that the silicone runs smoothly along the surface of the join. In this case, we are using a grey coloured silicone along the base to match the floor tiles and a white silicone up the wall to match the wall tiles.

Sealant being used to fill gaps in a bathroom

3Apply the silicone along the join

Put your silicone container into the caulking gun. Apply the silicone generously along the join, starting from the centre and working your way out.  

Sealant being used to fill gaps in a bathroom

4Make a smooth silicone join

Once you have applied the silicone, spray the area with water. Then run the end of popsicle stick along the join to smooth it over. If any clean up is required use turpentine or a silicone remover to take away excess silicone.
Excess sealant being scraped clear with an icy pole stick
Health & Safety

Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.

When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.