Firestop joints EI30–EI90 (Steinhausen)

Clean, durable joints – tone‑in‑tone, neatly tooled and documented.

12.03.2025 • Eurofugen Team • 2 min read

Why professional joints matter

Clean, elastic joints protect substrates from moisture and handle building movement without cracking. Around Steinhausen we ensure two‑sided adhesion, correct joint geometry and a crisp finish – fully documented.

Common failure patterns

Adhesion loss: poor prep/missing primer.
Shrinkage: wrong geometry/insufficient depth.
Mould: persistent moisture or wrong product.
Colour mismatch: visually noisy result.

Early replacement prevents costly damage.

Applications

Interior

Bathrooms/showers, kitchens, window finish joints, floor/wall joints.

Exterior

Façades, balconies/terraces, plinths. UV‑stable systems required.

Step by step

Assessment: width/depth, substrate, movement.
Masking & surface protection.
Removal of old sealant; clean/degrease.
Backer rod sized for two‑sided adhesion.
Primer per system.
Application & geometry by detail.
Tooling/finish & photo report.

Materials compared

Sanitary silicone: very elastic, mildew‑resistant; not paintable.
Hybrid: wide adhesion, sometimes paintable; robust outdoors.
PU: strong for more structural connections.

Colour & finish

Tone‑in‑tone and crisp edges deliver a calm, premium look.

Quality & documentation

Photo report with details
Batch/primer/backer rod recorded
Handover with care guidance

Case study Steinhausen

Old joint removed, bond faces prepared, correctly sized backer installed, primed as required and sealant tooled evenly. Result: tight, clean joints with a consistent colour.