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Ottoseal S67 cleanroom and HVAC silicone neutral fungicidal 310 ml transparent

Description

Ottoseal S67 is a cleanroom and HVAC silicone based on a neutral-curing 1K silicone (alkoxy system) for elastic joints in areas with high hygiene requirements. It has been tested for microbial resistance to DIN EN ISO 846, is suitable for ventilation systems according to VDI 6022 Part 1 and carries the EMICODE EC 1 Plus seal. The 310 ml cartridge in eight shades is aimed at jointing professionals and ventilation installers.

Benefits at a glance

  • Hygienic: fungicidally treated and resistant to cleaning and disinfecting agents.
  • Gentle on metals: neutral-curing and non-corrosive, adheres without primer to stainless steel and galvanised iron.
  • Pleasant in the room: low odour during application, EMICODE EC 1 Plus and French VOC class A+.
  • Permanently elastic: elongation at break approx. 700 %, temperature-resistant from -40 to +120 °C.
  • For indoors and outdoors: very good weathering, ageing and UV resistance.

Areas of application

  • Cleanrooms and production rooms, for example in chip and electronics manufacturing
  • Production rooms for pharmaceuticals and medical devices
  • Operating theatres, examination and laboratory rooms, hospitals
  • Food-processing plants and cold storage areas
  • Sealing ventilation and air-conditioning systems, such as kitchen extract air

Limits & notes

Not for natural stone such as marble or granite – a natural stone silicone is the right choice for that. Not for bonding over large areas; from 15 mm layer thickness ask the manufacturer's technical service. Avoid contact with bitumen, butyl, EPDM, neoprene or black coatings. In dark rooms without daylight, light shades can yellow. According to the data sheet, the declaration of no objection for the area close to food applies only to transparent, stainless steel and RAL 9010.

Labelling: The product is not classified under Regulation (EC) No 1272/2008; no signal word applies. EUH208 Contains trimethoxyvinylsilane, 3-(triethoxysilyl)propylamine, 2-octyl-2H-isothiazol-3-one. May produce an allergic reaction. EUH210 Safety data sheet available on request. Safety data sheet available from the manufacturer.

Application & tips

Bonding surfaces must be clean, free of grease, dry and sound. Clean non-porous surfaces with OTTO Cleaner T, porous ones with the steel brush. Apply at +5 to +35 °C with manual, compressed-air or cordless gun. Smooth before skin formation after approx. 10 minutes without pushing silicone layers over one another. Ensure good ventilation during application and curing and avoid skin contact. Store unopened and dry at +15 to +25 °C; according to the manufacturer a trial application is always necessary.

Frequently asked questions

Is Ottoseal S67 suitable for ventilation systems?
According to the manufacturer it is suitable for HVAC systems to VDI 6022 Part 1.

Can the silicone come into contact with food?
An ISEGA declaration of no objection exists only for transparent, stainless steel and RAL 9010.

Does the joint tolerate disinfectants?
Yes, details are given in the manufacturer's resistance list.

Do I need a primer?
Not on glass, ceramic and stainless steel. Concrete, plaster and aerated concrete need OTTO Primer 1215, powder-coated aluminium 1101 or 1216.

Can I use S67 on marble or granite?
No, the manufacturer excludes natural stone.

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 system), low in odour
Test: DIN EN ISO 846 (ISEGA), suitable for HVAC systems to VDI 6022 part 1
Emissions: EMICODE EC 1 Plus, French VOC class A+
Fire behaviour: Class E to EN 13501
Shore A hardness: approx. 26
Elongation at break: approx. 700 %
Temperature resistance: -40 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 to +35 °C
Use
Field of use: Indoors and outdoors
What's included
Supplied as: 310 ml cartridge, storable 12 months from manufacture (unopened, dry, +15 to +25 °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

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Project: Apply sealant from the cartridge

Cut the cartridge tip off above the thread, screw on the nozzle and cut it at an angle to match the joint width. Insert the cartridge into the manual gun, mask the joint edges, inject evenly and smooth the joint immediately.

  1. Prepare the surface

  2. Tools & accessories

  3. Finish & care

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