Silicone sealant for long-term moisture exposure in pale grey
OTTOSEAL® S 100 in pale grey is a high-quality, one-component sanitary silicone based on acetate, specially developed for professional use in wet areas. This sealant is mould-resistant, easy to apply and provides a uniform, discreet appearance – ideal for sealing around showers, bathrooms and toilets. The paste-like, non-sag consistency allows for precise application and clean finishing.
Typical areas of application
- Connection joints at bathtubs, washbasins and showers
- Movement joints in bathrooms
- Sealing of glass blocks or ceramic surfaces
- Product features at a glance
- Mould-resistant thanks to fungicidal formulation
- UV and weather resistant – suitable for outdoor use
- Temperature resistant from -40 °C to +180 °C
- Permanently elastic with movement capability up to 25%
- Can be applied from +5 °C, skin formation after approx. 10 min
- Primerless adhesion on many common substrates
Application notes
Substrates must be clean and stable. For smooth materials, a primer may be necessary. After application, the silicone should be smoothed using an appropriate smoothing agent. For best results, use matching tools and smoothing products. Perfect for sealing modern bathrooms, kitchens and other wet zones under permanent stress.
Is OTTOSEAL® S 100 C86 suitable for continuous moisture exposure?
Yes, it’s designed specifically for wet areas.
The formulation is ideal for environments where water exposure is constant, such as showers or around washbasins. Its fungicidal additives ensure long-term hygiene and prevent mould growth in the joints.
Can the pale grey silicone be used in visible areas?
Yes, it’s well suited for discreet joint designs.
Shade C86 (pale grey) offers a neutral, soft tone that harmonizes well with bright or natural-looking surfaces, creating a clean joint pattern that blends into modern designs without drawing attention.
How flexible is the silicone once cured?
It remains permanently elastic and accommodates movement reliably.
In wet areas, substrates often shift due to temperature changes. OTTOSEAL® S 100 compensates for these shifts with up to 25% movement capability, ensuring the joint doesn’t crack or detach.
Is priming always required before application?
Not always – but it may be needed for difficult substrates.
On non-porous surfaces like ceramic or glass, the sealant usually adheres well without primer. However, absorbent or very smooth materials may require a primer for optimal bonding.
What’s the best way to smooth the surface?
Use a silicone-compatible smoothing agent and suitable tools.
After application, shape the joint using a smoothing agent and a joint finisher to create clean, flawless results with no cracks or voids.
How long before the joint can be exposed to stress?
The silicone fully cures over several days.
Skin formation occurs after about 10 minutes. Full curing depends on joint depth and ambient conditions, typically around 2–3 mm per day. Wait until fully cured before exposing the joint to water.
Is the silicone resistant to UV radiation?
Yes, OTTOSEAL® S 100 is UV-stable and suitable for outdoor use.
Its formulation protects the sealant from yellowing or becoming brittle due to sunlight, making it ideal for outdoor joints, e.g., in facades or glass block elements.
What are the ideal storage conditions?
Cool, dry, and frost-free – shelf life up to 24 months.
Store unopened cartridges between +5 °C and +25 °C. Avoid direct sunlight, high humidity and frost to maintain product quality.
Is the cured silicone compatible with common cleaners?
Yes, it’s resistant to many household cleaners.
Once fully cured, OTTOSEAL® S 100 offers good chemical resistance to standard sanitary cleaners. Aggressive cleaning agents should be tested beforehand.
Can damaged joints be repaired locally?
Yes, partial repairs are possible.
Damaged or dirty areas can be cut out and resealed using fresh OTTOSEAL® S 100. Ensure the area is clean and use a primer if necessary for a secure bond at the transition.
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