Ottoseal S125 floor and sanitary silicone matt low-odour 310 ml – case of 20
€156.90
- A matt surface with no gloss edge - it harmonises with matt tiles, floors and profiles
- Low in odour and EMICODE EC 1 PLUS - pleasant to apply even in occupied rooms
- Fungicidal formulation against mould growth in bathroom, kitchen and floor joints
- Non-corrosive on unprotected metals, and weather- and UV-resistant with it
- 14 days right of withdrawal
- Expert advice: 02831 9167703 Mon–Thu 9–16, Fri 9–12 (CET)
- Specialist dealer in Kevelaer, Lower Rhine
Description
The case of 20 is the manufacturer’s original case containing 20 units of the same type. You pay less per unit than when buying singly, and the sealed case is delivered – ideal for trade businesses and larger projects.
Ottoseal S125 is a sanitary and floor silicone based on neutral-curing alkoxy for elastic joints in bathroom, kitchen and on floor coverings as well as for connection joints on windows and facades. It is tested to EN 15651 for facade, glazing, sanitary and walkable joints indoors and cures with low odour. The 310 ml cartridge in 26 matt colour shades is aimed at tilers, floor layers and DIY enthusiasts who need a joint without a gloss edge.
Benefits at a glance
- No gloss edge: The matt surface matches matt tiles, designer floors and window profiles.
- Low odour: neutral-curing without vinegar smell, EMICODE EC 1 PLUS and VOC class A+.
- Mould-inhibiting: fungicidally finished, tested to EN 15651-3 XS 1 for the sanitary area.
- Compatible with metal: non-corrosive towards unprotected metal surfaces.
- Permanently elastic: 25 % permissible total deformation, weather-, ageing- and UV-resistant, temperature-resistant from −40 °C to +120 °C.
Areas of application
- Floor and connection joints on plastic, vinyl, linoleum, cork and wooden floors
- Expansion and connection joints in sanitary areas, at bathtub, shower and washbasin
- Connection joints on windows and doors
- Joints on facades and parapet elements
- Walkable joints indoors to EN 15651-4
Limits & notes
Ottoseal S125 is not paintable and not sandable. It does not adhere reliably to mineral composite material and polypropylene (PP). For natural stone such as marble or granite, a special natural stone silicone is the right choice because it causes no edge-zone discolouration. Avoid contact with materials containing bitumen.
Application & tips
The bonding surfaces must be clean, free of grease, dry and sound; pre-treat non-porous surfaces with a cleaner, use a suitable primer depending on the substrate. Backfill deep joints with backing cord, mask the joint edges on stain-sensitive floor coverings. Insert the cartridge into a manual caulking gun, apply the sealant without bubbles and, before skin formation (approx. 10 minutes), smooth with a little smoothing agent. With the matt colours, smooth the joint only once: the more often the surface is reworked with smoothing agent, the more the matt effect is lost. Apply between +5 °C and +35 °C; through-curing is approx. 2–3 mm in 24 hours. Remove fresh residues with a cleaning wipe, cured silicone only mechanically. Unopened, the cartridge has a shelf life of 15 months.
Technical data
| Area of use: | Exterior, Interior |
|---|---|
| Colour: | matt white oak |
| Content: | 310 ml |
| Gloss level: | Matt |
| Material: | Silicone |
| Pack size: | 310 ml cartridge |
| Technical data | |
|---|---|
| Base: | 1K silicone on an alkoxy base, neutral-curing |
| Standard: | EN 15651-1 F EXT-INT CC 25 LM, EN 15651-2 G CC 25 LM, EN 15651-3 XS 1, EN 15651-4 PW INT 12.5 E |
| Fire behaviour: | Class E to EN 13501 |
| Emissions: | EMICODE EC 1 PLUS, French VOC class A+ |
| Permissible total joint movement: | 25 % |
| Shore A hardness: | approx. 31 (matt shades) |
| Density: | approx. 1.3 g/cm³ (matt shades) |
| Temperature resistance: | −40 °C to +120 °C |
| Application | |
| Skin formation time: | approx. 10 min (23 °C, 50 % RH) |
| Through-curing: | approx. 2–3 mm in 24 h (23 °C, 50 % r. F.) |
| Application temperature: | +5 °C to +35 °C |
| What's included | |
| Supplied as: | 310 ml cartridge, unopened storable 15 months |
Frequently asked questions
Can I paint over Ottoseal S125?
No. According to the manufacturer's data sheet the sealant is neither paintable nor sandable. Therefore choose the colour shade beforehand from the 26 matt shades.
Does the silicone smell of vinegar during curing?
No. S125 cures neutral on an alkoxy basis and is low in odour, so it is also suitable for occupied rooms.
Is S125 suitable for natural stone?
No. For marble, granite and other natural stones, a natural stone silicone that causes no edge-zone discolouration is necessary.
Why is my matt joint glossy in places?
Repeated re-smoothing with smoothing agent reduces the matt effect. Therefore draw off the joint in one pass with little smoothing agent.
Data sheets
Data sheets and documents
All documents come unchanged from the manufacturer.
Manufacturer information
Manufacturer information pursuant to Art. 19 EU GPSR
Postal address
Hermann Otto GmbH
Krankenhausstr. 14
83413 Fridolfing
Germany
Electronic address info@otto-chemie.de
Information as of: 2026-09-17
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