How to apply bathroom sealant

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How to apply bathroom sealant

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Project 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. 

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Finish silicone

To give silicone a smooth finish, some people use a bit of saliva on the end of their finger. Then six months later they wonder why their silicone has started to go mouldy. The bacteria in your mouth will happily grow in silicone, which creates those darks stains. To get a smooth finish that won’t discolour, use a wet rag dipped in fresh water instead.

Step by Step Instructions

1 Prepare the tile surface
2 Cut the silicone nozzle
3 Apply the silicone along the join
4 Make a smooth silicone join
  • Step 1. Prepare 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. 

  • Step 2. Cut 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.

  • Step 3. Apply 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.  

  • Step 4. Make 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.

Tools and Materials

Tools

  • Caulking gun

Materials

  • Popsicle sticks
  • Rag
  • Silicone – grey and white
  • Turpentine or silicone remover
  • Water in a spray bottle
  • 5

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More D.I.Y. Advice

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 DIY 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

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