Why professional joints matter
Clean joints are the quiet heroes: tight, elastic and visually neat.
Project in Luzern (Central Switzerland): tone‑in‑tone match, consistent geometry and documentation with photos and batch numbers.
Common failure patterns
- Cracks/shrinkage: Joint splits or pulls back – wrong geometry or ageing.
- Adhesion loss: One‑side debonding due to missing primer.
- Mould: Persistent moisture or wrong product in wet areas.
- Colour: Noisy look due to poor tone‑in‑tone match.
Act early to avoid costly moisture damage.
Applications
Bathroom & shower
Sanitary silicone.
Windows & doors
Interior finish, exterior UV‑stable.
Outdoors
Movement joints in concrete/stone.
Step by step
- Assessment: width/depth, substrates, movement, moisture, colour.
- Masking: protect adjacent surfaces, prepare crisp edges.
- Removal: old sealant out, clean and degrease bond faces.
- Backer rod: sized to avoid three‑sided adhesion.
- Primer as required by the system.
- Application: even extrusion, geometry per detail.
- Tooling & finish: calm edge, tone‑in‑tone. Photo documentation & batch records.
Silicone, hybrid or PU?
- Sanitary silicone: high elasticity, mildew‑resistant; not paintable.
- Hybrid: wide adhesion, low odour; partly paintable; robust outdoors.
- PU: strong and durable for more mechanical stress.
Tone‑in‑tone & finish
Colours match the substrate; crisp edges deliver a premium look.
Quality & documentation
- Photo report
- Product/primer/batch
- Handover & care guidance
Case study Luzern
Old sealant removed, bond faces prepared, backer rod sized, Checklist executed to system.
Video
About the clip
Clip shows: removal, prep, priming, applying, tooling. Timings depend on the system.
Gallery
Facts
Industry
Construction / Checklist
Location
Luzern
Systems
Hybrid, silicone, PU
Execution & documentation
Execution: Masking, priming, even extrusion, clean tooling. Documentation incl. batch records.
Tips & tricks
- Squeegee after showering and ventilate.
- Use mild detergents; avoid scouring agents/solvents.
- Do not paint over or over‑seal movement joints.
- Keep exterior joints clean – no grit in the section.
- Visual check every 2–3 years; replace early if cracks appear.
Further reading
Next step
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