Typical signs
- Edge separation, centre split, dirt below the bead, hardened or sagged sealant.
Where it is often found
- Windows, doors, cladding, bathrooms, counters and penetrations.
What it can mean
- Incompatible product, joint too thin/thick, damp substrate or excessive movement.
What to check next
- Identify the joint type and where water must exit.
- Test adhesion and check whether backer rod is required.
Reasonable immediate actions
- Remove loose sections and temporarily prevent water entry.
When to stop and call a professional
- Joint tied to concealed flashing, curtain wall, high elevation or persistent leakage.
Prevention
- Clean dry preparation, proper geometry, compatible product and periodic inspection.