You might think sealing a shower tray is just a matter of running a line of silicone round the edge and forgetting about it. There are lots of potential pitfalls to be aware of and it’s important not to rush. You need to create a barrier that stops all moisture working its way into floors and walls, and that will only happen if you use a proper bathroom sealant and take your time. You don’t notice sealant when it’s done well – but you will definitely notice it when it’s done badly.
Clear out the old sealant
First you need to remove every last bit of old sealant. Even thin smears you can barely see will stop the new bathroom sealant from bonding properly. Use a scraper or removal tool, then wipe the area down to get rid of any oils. Let everything dry naturally. If there’s hidden moisture, the seal might look fine at first, then end up peeling off after a few weeks. Here, you can read tips on removing sealant.
Slow and even
Move at a steady pace along the joint between tray and wall. Make sure it’s not too thick. You just need full, even coverage with no gaps. Smooth it straight away with a damp finger or a tool. This presses the bathroom sealant into the gap and gives you a really neat finish.
Leave it to cure
Now you need to be patient. Leave it at least a full day before you use the shower. It might feel dry earlier, but inside it’s still setting.