When you install a new bath or refresh an old one, one of the most important steps is applying sealant. Without it, you risk the growth of rot and mould, as well as water damage spreading through your home.
What is sealing a bath?
Sealing a bath is when you fill the gaps between the bath and the walls to prevent water seeping through. Usually a silicone sealant is used. Similar processes exist for showers and basins.
https://www.ct1.com/product_application/sealing-your-shower-tray-with-bt1-bathroom-sealant/ is one example of a type of bathroom sealant.
Why is it important?
Bathrooms are often warm and damp, which encourages mould. This is a health risk as well as looking unsightly. Water can also seep through even the smallest gap, soaking into the walls and floor, damaging their integrity and potentially causing leaks outside of the bathroom. These problems will become increasingly severe over time.
How do you do it?
If you already have a bath, then you need to remove any existing sealant first. There are special tools to help you scrape it out, but you can also use a sharp knife or the end of a screwdriver. Any sealant left behind can be rubbed with a cloth, toothbrush or even your finger. If it proves stubborn, you may want to use a cloth dipped in white spirit.
Mark the edges of the area with masking tape. This will protect your tiles and act as a guide. Trim the nozzle of your chosen sealant to a 45° angle and load into a caulking gun. Gently move the nozzle along the line created by your masking tape, steadily squeezing the trigger to apply it evenly. Do not stop until you are finished. Smooth the surface with a designated tool or with your finger. Leave it to set according to the instructions, usually for 24 hours, before using the bath, but leave the bath full of water in the meantime.
Sealing a bath does not have to be a complicated process, but it should be performed carefully to ensure that your walls and floor are protected from water damage.