If taking a shower leaves your bathroom floor wetter than your shower recess, it's likely you have a leak!

Luckily there's an easy fix - and with Selleys No Mould, you can be back using your shower within an hour.

Beginner Intermediate Advanced
1 hour

What You Need

How to Guide

  1. Remove the old sealant by pushing the knife deep inside the join and running it down the length of the seal. The sealant should peel away in long pieces, exposing the join. If it’s difficult to remove, you might want to try Selleys Silicone Remover (follow the instructions on the pack).
  2. Use a cloth soaked in mineral turpentine to clean the newly exposed join area, ensuring all traces of the silicone has been removed then wipe the area dry.
  3. Protect the glass screen from silicone with a strip of tape running down its length. Make sure you don’t cover the join though! Do the same for the tile side of the wall.
  4. Cut the Selleys Wet Area Silicone or Selleys No Mould cartridge tip and place in the caulking gun. Attached the nozzle to the cartridge and snip the nozzle at a 45 degree angle.
  5. Pump the gun until the silicone just begins to emerge, then apply evenly to the join in a downwards motion starting from the top of the shower screen.
  6. Use the spatula dipped in some soapy water (round corner), to clean up uneven areas and ensure the silicone is applied deeply to the join. Wash the spatula with some soapy water between touch ups.
  7. Remove tape from wall and screen immediately after smoothing the sealant, then clean up the area with a cloth dampened with mineral turps. You’ll have about 5 minutes to do this before the silicone begins to skin.
  8. If using Selleys No Mould, the sealant will have a firm skin and will be waterproof and shower ready just 1 hour after application. The semi-cured sealant must not be touched until fully cured (48 hours). If using Selleys Wet Area Silicone, the sealant should be allowed to fully cure (72 hours) before returning shower to use.


Handy Tips

  • Clean and dry surfaces of oil, dirt and grease with mineral turpentine and then methylated spirits. Allow to dry completely before applying silicone. If old silicone needs to be removed, simply apply Selleys Silicone Remover and the old silicone can be removed easily after 2 hours
  • Tape both sides of the gap before applying the product. This ensures a neat finish and makes it easier to clean up
  • When first applying product, extrude a small amount onto a piece of scrap material to ensure a smooth continuous flow of silicone sealant
  • Remove the tape before the silicone sealant skins
  • Use a spatula dipped in mineral turps or detergent and water to tool off the sealant
  • Work in sections that can be completed before sealant skins.


Selleys No Mould Silicone Sealant

Keep mould and mildew at bay with Selleys No Mould Silicone Sealant. This sealant provides a water-tight seal that resists mould and mildew growth, perfect for wet areas.

Wet Area Silicone

Keep your wet areas mould-free with Selleys Wet Area Silicone, a superior waterproof and mould resistant seal that will not shrink, crack or peel away.

Silicone Remover

Remove old sealant quickly and easily with Selleys Silicone Remover. This powerful formula breaks down old sealant, making it easy to remove and to prepare surfaces.

Rapid Mould Killer (750ml)

Selleys Rapid Mould Killer 750ml is a powerful solution for removing mould in larger areas. Keep your family safe and healthy with our fast and effective cleaner.

How to Guides

How To Seal a Sink

Achieve a flawless finish in your bathroom or kitchen with Selleys. Our guide will show you how to seal a sink and achieve a clean and watertight surface.

How To Remove Old Silicone

Remove old silicone with ease using Selleys. Our guide will show you how to remove old silicone and prepare surfaces for reapplication.