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Bathroom Sealant
Create a flexible, watertight seal around baths, shower trays, basins, sanitaryware and tiled joints with our range of bathroom sealants. Choose sanitary or anti-mould silicone sealant for areas exposed to regular moisture, helping protect against water ingress, mould growth and premature joint failure.
Select from acetoxy and neutral-cure silicones, grout effect caulks, hybrid adhesive sealants, flexible waterproof sealants and liquid sealing tape. Cartridge sizes include 295ml, 300ml and 310ml for standard gun application, with larger liquid formats available for wider waterproofing work.
Choose from clear bathroom sealant and white silicone sealant, as well as grey, anthracite, black, cream and colour-matched options designed to coordinate with tiles and grout. Matt and grout effect finishes help create a more consistent joint, while contrasting colours can be used where the seal needs to stand out.
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Need help with Bathroom Sealant?
Recently Reviewed
Grout effects- just what I was looking for
30th July 2026Works well, easy to apply, seems to hold well. Will know in time if it lasts.
shirin R from Middlesex- verified purchaser
Briliant Item
29th July 2026Very good , say as it state on the tin , I will definitely invest in this again
Alex B from Scotland- verified purchaser
Review From Trustpilot
27th July 2026Great product as long as they get delivered
Leanne K- verified purchaser
Your choice
25th July 2026Sealant does its job. Clear leaves no marks or signs. Thank you.
Pramukhrai D from Greater London- verified purchaser
FAQ's
Bathroom sealant does a lot of heavy lifting, from keeping water out of joints to helping protect against mould and damp. To help you get the best result, we've answered some of the most common questions about waterproofing, repairs, application and how long a good seal should last.
Is silicone sealant completely waterproof?
Yes, once fully cured, 100% silicone sealant is waterproof and won't absorb or break down under normal bathroom moisture. Give it around 24 to 48 hours to cure properly before exposing it to water, and always check the label says "100% silicone" rather than an acrylic blend.
Will bathroom sealant stop a leak?
Bathroom sealant can stop small leaks around sinks, baths and other surface joints, provided the gap isn't under pressure. It won't fix a burst pipe, structural crack or large hole, so bigger plumbing problems need a proper repair rather than another bead of silicone.
Should I remove old silicone sealant before applying new?
Yes, remove the old silicone before applying a fresh bead. New bathroom sealant won't bond properly to cured silicone, which can lead to peeling, trapped mould and hidden leaks.
How long does bathroom sealant typically last?
A properly applied sealant can last around 10 to 20 years, with quality silicone often lasting even longer. Its lifespan depends on surface preparation, movement, UV exposure and contact with chemicals. Apply it to a dirty or damp surface, though, and it could start failing within just a few years.