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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

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. 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. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.