Plumbing and maintenance
Silicone: why it fails and how to make it last
At a glance
- Baths should be filled before sealing so the joint is at its widest, otherwise the seal tears the first time the bath is used.
- Old silicone must be fully removed and the surface cleaned and dried, new sealant over old will not bond.
What to check
Point 1
Baths should be filled before sealing so the joint is at its widest, otherwise the seal tears the first time the bath is used.
Point 2
Old silicone must be fully removed and the surface cleaned and dried, new sealant over old will not bond.
Questions we get asked
Why does mould grow in the silicone?
Surface residue plus persistent moisture. Better ventilation and cleaning slows it; badly affected joints need replacing.
How often should it be redone?
When it discolours, lifts or shows any gap, typically every few years in a busy bathroom.
Getting sealant care right first time
Describe what is there now and what is bothering you. It is usually clear within a message or two whether this is straightforward or needs a look.