Ottoseal S120 Premium window silicone glazing rebate neutral-curing 310 ml
€9.79
- Neutral-curing on an alkoxy base, non-corrosive on unprotected metals
- Highly abrasion-resistant and streak-free when cleaning windows to ift guideline VE-04/2
- Compatible with PVB films to ift DI-02/1 and therefore suitable for laminated safety glass
- To EN 15651-1 and -2 for facade and glazing, 25 % total joint movement
- 14 days right of withdrawal
- Expert advice: 02831 9167703 Mon–Thu 9–16, Fri 9–12 (CET)
- Specialist dealer in Kevelaer, Lower Rhine
Description
Ottoseal S120 is a window silicone based on a neutral-curing 1K silicone (alkoxy system) for glazing rebate sealing on wooden windows and for connection and expansion joints indoors and outdoors. It is classified to EN 15651-1 for facades and EN 15651-2 for glazing and accommodates 25 % total deformation. The 310 ml cartridge in 20 shades is aimed at window fitters, glaziers and demanding DIY users.
Benefits at a glance
- Clean glass: highly abrasion-resistant and streak-free according to ift guideline VE-04/2.
- For laminated safety glass: compatible with PVB films according to the criteria of ift guideline DI-02/1.
- Gentle on materials: neutral-curing and non-corrosive towards unprotected metal surfaces.
- Pleasant to work with: low odour, EMICODE EC 1 Plus and French VOC class A+.
- Long-lasting: very good weather, ageing and UV resistance, temperature-resistant from -40 to +120 °C.
- Mould-inhibiting: fungicidally treated against mould attack on the glazing rebate.
Areas of application
- Glazing rebate sealing on wooden windows, also with laminated safety glass with PVB film
- Connection joints at windows and doors made of wood, metal and plastic
- Expansion and connection joints on precast concrete and aerated concrete elements
- Joints on facades and metal constructions
- Channel glass and glass blocks
- External face sealing in combination with ceramics, metal or glass
Limits & notes
According to the manufacturer not suitable for natural stone such as marble or granite, concrete block stone, acrylic glass (PMMA) and polypropylene (PP) – for natural stone, a natural stone silicone is the right choice. S120 is paint-compatible according to DIN 52452, but cannot itself be painted over; if a paintable joint is needed, a hybrid sealant is the right choice. Avoid contact with materials containing bitumen or releasing plasticisers, such as butyl, EPDM, neoprene, and with insulating and black coatings.
Application & tips
Bonding surfaces must be clean, free of grease, dry and sound. Clean smooth substrates with a cleaner and a lint-free cloth, free porous ones of loose parts mechanically. According to the primer table no primer is needed on glass, bare aluminium and untreated wood; concrete, aerated concrete and plaster need a primer, and plastic profiles and rigid PVC should be tested beforehand. Insert the cartridge into a manual caulking gun and apply at +5 to +40 °C. Before the skin forms after approx. 15 minutes, pull the joint off only once with a smoothing tool dipped in OTTO smoothing agent and remove any water streaks immediately. Assemble or pack windows and doors after 24 hours at the earliest. Can be stored unopened, dry, at +15 to +25 °C for 12 months.
Frequently asked questions
Can I paint over Ottoseal S120?
No. It is paint-compatible according to DIN 52452, but cannot itself be painted over.
Is S120 suitable for laminated safety glass?
Yes, it is compatible with PVB films according to the criteria of ift guideline DI-02/1 and is therefore suitable for sealing laminated safety glass.
How quickly does the joint cure?
The skin forms after approx. 15 minutes; it cures through approx. 2 mm in 24 hours (23 °C, 50 % relative humidity).
Can I use S120 for marble or granite?
No, natural stone is excluded according to the manufacturer because edge-zone discolouration is a risk. A natural stone silicone is intended for that.
Technical data
| Area of use: | Exterior, Interior |
|---|---|
| Content: | 310 ml |
| Material: | Silicone |
| Pack size: | 310 ml cartridge |
| Version | |
|---|---|
| Colour: | transparent |
| Technical data | |
| Base: | 1K silicone, neutral-curing (alkoxy) |
| Standard: | EN 15651-1 F EXT-INT CC 25 LM, EN 15651-2 G CC 25 LM, DIN 18540-F |
| Tests: | ift guideline VE-04/2 (abrasion-resistant, streak-free), ift guideline DI-02/1 (PVB-compatible) |
| Fire behaviour: | Class E to EN 13501 |
| Permissible total joint movement: | 25 % |
| Shore A hardness: | approx. 21 (gloss shades) |
| Temperature resistance: | -40 to +120 °C |
| Application | |
| Skin formation time: | approx. 15 min (23 °C, 50 % RH) |
| Through-curing: | approx. 2 mm in 24 h (23 °C, 50 % r. F.) |
| Application temperature: | +5 to +40 °C |
| Use | |
| Field of use: | Indoors and outdoors |
| What's included | |
| Supplied as: | 310 ml cartridge, unopened shelf life 12 months (dry, +15 to +25 °C) |
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
Reviews
All reviews come from buyers. Reviews can only be submitted via the personal, signed link we send to the order's e-mail address after delivery; the link is bound to the order and the purchased item, there is no form without a purchase. We check every review before publication and publish positive and negative reviews alike. Reviews from our former shop baustoffhandel-nrw.de were migrated; there, too, only customers who had bought the item could review it.
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