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Ottoseal S125 floor and sanitary silicone 400 ml

Description

OTTOSEAL® S 125 is a high-quality, low-odour floor and sanitary silicone for demanding sealing indoors and outdoors. It offers reliable adhesion, high elasticity and is developed specially for areas where permanent stress and moisture occur.

Benefits & properties

  • ✔️ Low-odour formulation for pleasant processing
  • ✔️ High abrasion resistance – ideal for floor joints
  • ✔️ Mould-resistant thanks to fungicidal finish
  • ✔️ Permanently elastic for long-lasting seals
  • ✔️ Very good adhesion on ceramic coverings and sanitary materials

Areas of application

  • Perfect for floor joints, corner joints and movement joints in sanitary areas
  • Optimal for damp rooms such as bathrooms, showers, wellness areas
  • Suitable for ceramic tiles, natural stone (compatible), glass and sanitary ceramics
  • Alternative to standard silicones when low odour development and high abrasion resistance are required

Detailed product description

OTTOSEAL® S 125 is a neutral-curing silicone with high viscosity, developed specially for heavily stressed joints. It is temperature-resistant from –40°C to +180°C and impresses with fast skin formation as well as high mechanical load capacity. Compared with conventional sanitary silicones it offers considerably higher abrasion resistance and is therefore ideal for floor joints.

Typical areas of use include construction, trades, tiling work, sanitary installations and demanding DIY projects. For optimum results the joints should be clean, dry and free of grease. Smoothing with a suitable tool ensures perfect surface quality.

Technical data

PropertyValue
ColourWide range of shades available
Container size400 ml bag
Application temperature+5°C to +35°C
Temperature resistance–40°C to +180°C
Skin-forming timeapprox. 10–20 minutes
Shelf life12 months (cool & dry)
Shore A hardnessapprox. 25
CertificatesEN 15651 Part 1, 3

FAQ

Is OTTOSEAL® S 125 suitable for floor joints?

Yes, the product is developed specially for heavily stressed floor joints and is particularly abrasion-resistant.

Can the silicone be used in sanitary areas?

Yes, it has a fungicidal finish and is ideal for damp rooms such as bathrooms and showers.

How long does curing take?

Skin formation takes place after approx. 10–20 minutes, complete curing takes 24–48 hours depending on joint thickness.

Is OTTOSEAL® S 125 low-odour?

Yes, the neutral-curing formulation ensures very low odour development.

Which substrates does the product adhere to?

It adheres excellently to ceramic tiles, glass, sanitary ceramics and many other smooth substrates.

Technical data

Material: Silicone
Version
Colour: transparent grey
Technical data
Contents: 400 ml
Product group: Sanitary silicone
Temperature resistance: up to +180 °C
Use
Merchandise group: Sealants
Application
Application temperature: +5 °C to +35 °C

Data sheets

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

All products by OTTO Chemie

Information as of: 2026-09-17

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For your project

These products go with it

Project: Renew the silicone joint in the bathroom

Remove the old silicone completely, treat mould around the joint and let the joint dry. Then mask the joint edges, inject new sanitary silicone, pull it off with smoothing agent and joint smoother and remove the tape immediately.

  1. Prepare the surface

  2. Tools & accessories

  3. Finish & care

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