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S 68 The neutral silicone for clean rooms and room ventilation systems

OTTOSEAL®

S 68

Technical Datasheet

Characteristics: - Neutral-curing 1-component silicone sealant, MEKO-free
- Non-corrosive
- Excellent weathering, ageing and UV-resistance
- Contains fungicides

Fields of application: - Elastic joints in cleanrooms and production areas with strict requirements to hygiene, e. g. electronic
sector - chip production
- Production rooms for medicines and other medical products
- Sealing of ventilation systems

Standards and tests: - Tested for applications in the cleanroom sector by the Institute for Hygiene Gelsenkirchen, Germany
- Suitable for use in HVAC systems in accordance with VDI 6022, sheet 1, tested in accordance with
DIN EN ISO 846, procedures A, B and C (Institute for hygiene, Berlin)
- Suitable for applications according to IVD instruction sheet no. 31+35 (IVD = German industry
association sealants)
- French VOC-emission class A+

Important information: Before applying this product the user has to ensure that the materials in the area of contact (solid, liquid
and gaseous) are compatible with it and also amongst each other and do not damage or alter (e. g.
discolour) each other. As for the materials that will be used at a later stage in the surrounding area of the
product the user has to clarify beforehand that the substances of content or evaporations do not lead to
an impairment or alteration (e. g. discolouration) of the product. In case of doubt the user should consult
the respective manufacturer of the material.
During the curing process of the material reaction products of the crosslinker are released.
Ensure good ventilation during application and curing.
The required vulcanization time prolongs with increasing thickness of the silicone layer. One-component
silicones must not be used for full-surface bonding applications unless special constructional
prerequisites are met. If one-component silicones are to be used for thickness layers of more than 15
mm please contact our technical department beforehand.
Due to interaction with liquid or gaseous chemicals e.g. iodine, bromine or aldehyde containing
substances, the silicone may discolour. It is adviseable to carry out tests before usage!
Avoid contact with materials which contain bitumen and which release solvents, e. g. butyl, EPDM,
neoprene, insulating- and bituminous paint.
Please contact our technical department if joints are exposed to heavy chemical or physical load.
Remark on the processing of the colour "stainless steel": Please note that when "modelling" the silicone,
i. e. when silicone layers are pushed on top of each other (e. g. in corner areas) dark, clearly visible
dividing lines could appear. These dividing lines can not be removed by smoothing the lines afterwards.
This effect occurs solely for the colour "stainless steel" and is caused by a special colour pigment which
is necessary to create the metallic effect. It is a typical characteristic of the colour "stainless steel" and it
does not represent a deficiency of the material. In order to avoid such effect, layers of silicone should
not be pushed on top of each other when smoothing material.
Upon restoring of joints contaminated with mould the existing elastic sealant must be removed
completely. Before re-jointing, the affected jointing areas are to be treated with OTTO Anti-Mildew Spray
to remove possibly existing fungal spores. Otherwise a new mould attack may occur in the joints again,
despite the mould protection technology of the sealant.

Technical Datasheet OTTOSEAL® S 68
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version: 25 / 21gb (13.12.2017, 15:53 h)
Hermann Otto GmbH · Krankenhausstr. 14 · 83413 Fridolfing, GERMANY
Tel.:+49 8684-908-0 · Fax: +49 8684-1260
e-mail: info@otto-chemie.de · Internet: www.otto-chemie.com