





The OTTOSEAL® S 100 Premium Sanitary Silicone Grey Matt (C8680) is the ideal sealing material for professional applications in the sanitary sector and for general sealing work. Tile setters and craftsmen, in particular, benefit from the excellent properties of this high-quality, 1K silicone based on acetate. The special grey matt finish not only provides an aesthetically pleasing solution but also a functional one, harmonising perfectly with modern matte surfaces.
The OTTOSEAL® S 100 is ideal for:
Sealing of expansion joints and connection joints in floor and wall areas
Sanitary joints in bathrooms and kitchens
Sealing of profile glass and glass blocks
Thanks to its special formulation, it is also highly effective in demanding areas such as showers and laundry rooms. Particularly noteworthy is the fungicidal and bacteriostatic properties which minimise the risk of mould and bacterial growth.
Excellent workability: The silicone is easy to smooth and model, making it easy to work with for both experienced craftsmen and less experienced users.
Durability and resistance: OTTOSEAL® S 100 offers excellent weather, aging, and UV resistance. This ensures that the seal remains effective even under extreme weather conditions or direct sunlight.
Top adhesion: The product provides reliable adhesion on a variety of substrates such as ceramic, glass, stainless steel, and many other materials – ensuring clean, long-lasting results.
Thanks to the special matt colour, the silicone also provides optimal integration with surfaces of a similar finish, ensuring an aesthetically pleasing seal. Additionally, the high Shore-A hardness ensures the joint remains resistant to mechanical stresses and wear – even with frequent exposure to moisture or cleaning.
Application temperature: +5 to +35 °C
Viscosity: Paste-like, stable
Density: ~1.0 g/cm³
Shore-A hardness: ~20
Total deformation: 50%
Permissible total deformation: 25% (according to EN 15651)
Temperature resistance: -40 °C to +180 °C
Skinning time: Approx. 10 minutes (at 23 °C and 50% relative humidity)
Curing time in 24 hours: 2-3 mm (at 23 °C and 50% relative humidity)
EMICODE® EC 1 Plus – very low emissions for a healthy indoor climate.
The surfaces to be sealed must be clean, grease-free, and dry before application.
For particularly difficult surfaces, such as highly porous materials, the use of a primer is recommended.
For a clean, matt surface, ensure that the silicone is only smoothed once. Repeated smoothing can diminish the matt effect.
The OTTOSEAL® S 100 is best applied at moderate temperatures and under good ventilation conditions. When applying the sealant on ceramic or glass, ensure the surfaces are thoroughly cleaned to maximise adhesion.
For sanitary applications where constant moisture is present, the silicone offers high protection against mould and algae growth due to its special fungicidal properties, ensuring a durable and hygienic seal.
The OTTOSEAL® S 100 Premium Sanitary Silicone is available in the following matte colours:
The OTTOSEAL® S 100 is certified according to EN 15651, Parts 1, 2, 3, and 4, ensuring reliable performance in various applications. It also carries the EMICODE® EC 1 Plus label, indicating very low emissions and compliance with strict environmental standards. Additionally, it holds the quality seal of the IVD (Industrieverband Dichtstoffe e.V.), a mark of excellence for sealant products. Finally, the OTTOSEAL® S 100 is REACH compliant (Regulation (EC) No. 1907/2006), ensuring it meets the highest safety and environmental protection requirements.
The OTTOSEAL® S 100 meets the highest demands of professionals who rely on durable and reliable products in their daily work. It not only offers excellent functionality and ease of use but also high resistance to environmental factors and visually appealing seals for demanding sanitary applications. The sealant excels in any application – whether for expansion joints, wall connections, or sanitary areas – ensuring that the work is done professionally and permanently.
Karl Dahm offers this high-quality sealant directly in the online shop for quick and easy orders.
Which substrates can OTTOSEAL® S 100 seal effectively?
OTTOSEAL® S 100 adheres reliably to many surfaces such as ceramic, glass, stainless steel, and concrete walls. A primer may be recommended for problematic materials.
How is OTTOSEAL® S 100 applied?
Apply the silicone evenly to the prepared, clean joint surfaces. Use an appropriate smoothing tool to achieve a smooth and aesthetically pleasing surface.
Can OTTOSEAL® S 100 be used outdoors?
Yes, OTTOSEAL® S 100 offers excellent weather and UV resistance, making it ideal for outdoor applications.
How long does it take for OTTOSEAL® S 100 to cure?
At a temperature of 23 °C and 50% relative humidity, curing takes approximately 2-3 mm per day.
Can OTTOSEAL® S 100 be used in low temperatures?
The sealant can be applied at temperatures from 5 °C. Avoid using it in extremely cold conditions to ensure optimal adhesion.
What colours are available for OTTOSEAL® S 100?
The product is available in grey matt (C8680) and other colours, perfectly suited to integrate into your work environment.
How should I maintain a joint sealed with OTTOSEAL® S 100?
It is recommended to clean the joints regularly with a damp cloth. Do not use harsh cleaning agents that could damage the silicone.
Is OTTOSEAL® S 100 suitable for use in wet areas?
Yes, due to its fungicidal properties, OTTOSEAL® S 100 is highly resistant to mould formation, making it ideal for use in wet areas such as showers and bathrooms.
Can OTTOSEAL® S 100 be used with other silicones?
We recommend using only one silicone of the same type and brand to ensure optimal adhesion and durability.
What should be considered when storing OTTOSEAL® S 100?
Store the product at a temperature of +15 °C to +25 °C and a humidity level of below 60%. Avoid high temperatures and direct sunlight.