How to apply sealants in wet areas

Wednesday, 11 February 2015 4:55:21 PM Australia/Sydney

Applying fresh sealant in your bathroom helps keep mould and water damage at bay, so here’s a few tips on how to apply sealant. Half the secret is in the application and the other is the sealant, so make sure you pick a quality waterproof quality sealant.

A tradesman is only as good as his tools. So for best results when sealing, make sure you have on hand a quality sealant, applicator gun, masking tape, damp cloth, spray bottle, ice cream stick and scissors.


Project Steps:

  • Step 1: Use Applicator Gun
  • Step 2: Wipe Surface
  • Step 3: Apply the Sealant
  • Step 4: Smooth the Joints

Project Checklist


  • Sealant
  • Applicator gun
  • Masking tape
  • Damp cloth
  • Spray bottle
  • Ice cream stick
  • Scissors
  • Pencil


Step 1


To prepare, screw the nozzle onto the end of the tube of sealant and cut the sealant nozzle at a 45-degree angle. Insert it into the applicator gun.

Step 2


Wipe the surface that you will be sealing with a damp cloth to remove any dust and debris.

If you are not confident that you will have a clean edge, apply masking tape to either side of the area where silicone is being applied, leaving a 2-3mm gap. This will help stop the sealant bleeding.

Step 3


With the sealant gun in hand, place the nozzle in the area you want to seal and gently pull the trigger, moving the applicator to ensure the bead is the same thickness throughout its length.

Step 4


Use a spray bottle with water and soap, spray the sealant and run an ice cream stick along the joint to make it smooth.

Copyright Mitre 10 Australia Pty Ltd. Reproduction prohibited other than for personal use. This guide has been produced to provide basic information and our experienced staff are available to answer any questions you may have. However, this information is provided for use on the understanding that Mitre 10 is not liable for any claim, cost, expense, loss or damage which is suffered or incurred (including but not limited to indirect or consequential loss), for any personal injury or damage to property suffered or sustained as a result of or arising out of or in any way connected with using the information contained in this guide. Mitre 10 advises you to call in a qualified trades person, such as an electrician or plumber, where expert services are required, and to independently assess any safety precautions that will need to be followed prior to using the information in this guide.