Grab Up To 60% Off In Our Big Clearance Sale!
+ Extra 10% off our Furniture With Code FURN10. Ends:
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.
Filter By
View:
View:
£10.95
In Stock
94
4.9 out of 5 review stars
£8.95
In Stock
15
4.6 out of 5 review stars
£44.95
In Stock
23
4.8 out of 5 review stars
£9.95
In Stock
13
4.7 out of 5 review stars
£8.95
In Stock
More Options
SAVE 30%
£13.95
Was £19.95
41 left in stock
£8.27
In Stock
2
5 out of 5 review stars
More Options
£9.95
In Stock
11
4.9 out of 5 review stars
£11.95
In Stock
£9.95
In Stock
Need help with Bathroom Sealant?
Recently Reviewed
Perfect colour match
8th August 2026Perfect match to our tiles and grout and easy to apply - looks superb
Jenny C from - verified purchaser
Grout expectations
6th August 2026Jasmine was great in the cracks of the tiles
Adam M from - verified purchaser
Didn’t use
5th August 2026I can’t say anything about this as the tradesmen wanted to use a different sealant. I’ve given it 5 stars because I expect it probably does what it’s meant to do.
siobhan M from Kent- verified purchaser
Great product, so far
4th August 2026I used this around the bath seal. It sticks really well. It has been in place 3 weeks now, with no issues. I would have liked more of it, as i could not reseal the whole bath. Just one length.
Shawna E from North Lanarkshire- 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.