How To: Seal A Bath

What you will need

  • Paint scraper/sealant remover
  • Scouring pad
  • Methylated spirits
  • Sealant tube & gun
  • Washing-up liquid
  • Utility knife
  • Disposable gloves


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  • 1 Having a good seal around your bath/shower is very important as it prevents water from seeping down through the floor. The vast majority of damp spots in ceilings are caused by broken seals in the bathroom.
  • 2 Use a paint scraper or sealant remover to remove any old sealant from around the bath. Then use a scouring pad dipped in methylated spirits to remove any last bits of sealant from the bath. (Chemical silicone removers are also available which help soften/break-down the seal and makes it easy to remove the silicone.) Top Tip: Fill the bath half way with water before applying sealant. This way you will allow for any movement from the weight of the bath when it is actually being used.
  • 3 Cut the nozzle to size, to allow the silicone out. For best results cut the nozzle at an angle of 30 degrees with a sharp utility knife.
  • 4 Run the nozzle along the gap releasing the silicone as you go. Try to be steady with your application to achieve the best finish.
  • 5 Coat your finger in washing-up liquid and run along the silicone seal. This will remove any lumps from the seal and give an even finish.