How to Apply Silicone

Things you will need.

  1. Tube of Silicone   – Tilers silicone  ( Acid Cure )  or Neutral Cure for use on Marble Benchtops –
  2. Plastic applicator nozzle 
  3. Stanely knife
  4. Silicone application gun.
  5. Spray bottle( 500 ml ) with 2 teaspoons of dish wash liquid and water.
  6. Iceblock stick. 
  7. Piece of cardboard to place the removed silicone onto.

The process of applying silicone is to place an oversize bead into the junction, spray with soapy water and then run the iceblock stick along the junction removing the excess silicone, leaving a smooth consistent coved bead of silicone behind. We call this “ tooling”.

Four important facts

  1. The silicone will not stick to any surface that has been introduced to the soapy water.
  2. In warmer temperatures –  more than 25 deg c the silicone will begin setting up ( turning hard) much more quickly so you need to be more strategic about how much silicone you lay out before tooling it.
  3. It is best practice to work from the bottom up so that you have the lower parts done before any soapy water you spray in the upper parts of the panel run down the panel into the junctions yet to be siliconed.
  4. Ensure all junction to be siliconed are clean and dry.  A wipe over with Metholated spirits can be a good idea.  The meths removes most contaminants and drys instantly.

So to begin.

  1. Open up the tube of Silicone by cutting the tip off the tube, leaving the threaded part of the outlet in place.

02. Screw on the plastic applicator nozzle.

03. Use the Stanley knife to cut the end of the nozzle on a 45 deg angle. Cut this from the top of the nozzle down. By cutting in this direction you leave a clean sharp cut at the tip of the nozzle.  If you cut towards the tip you will be left with a small tag at the top which effects how the silicone is laid into the junction.

04.Place the tube into the applicator gun.

05. You will be laying silicone in the junction between the bench or vanity etc first.  If the panel meets a wall at one or both ends, I will start the silicone 100 mm up the wall. Run down to the corner and then along the horizontal.  I do this so I can spray the soapy water into the corner.  So the liquid might spray up the wall 50 mm but not come in contact with any area yet to have silicone laid into it.

06. Once the silicone has been applied to the junction in a slightly over-sized bead, you will spray it with soapy water, being careful not to spray any areas that have yet to have silicone applied.

07. Next take the ice-block stick and spray the end with soapy water, this will prevent the silicone sticking to the stick.

08. Next simply run the ice-block sticks rounded end along the junction.  This will create a smooth cove.  You will be removing at least 10 – 20 % of the silicone you laid in the junction. I will generally tool 5-800 mm at a time.  The excess silicone will build up in front of the stick to the point where you will need to remove it.  Its then a matter of simply transferring the excess to the piece of cardboard you have handy.

09. Once you have the lower horizontal applied its just a matter of applying the same process around the whole panel.

10. Once you have all of the silicone in place and tooled we find it best to wipe as much excess soapy water off the panel surface as possible without disturbing the silicone which yet to have set up ( gone hard) 

11. Once the silicone has set up you should wipe down the panel with paper towels to remove any soapy water residue you couldn’t remove while the silicone was not set.

Job done.

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