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Ottoseal S50 silicone crystal clear – case of 20

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 S50 Crystal-Clear Silicone is a silicone sealant that cures crystal clear, particularly well suited to bonding and sealing glass, plastics, aluminium, display cabinets and shop windows that are to be joined particularly inconspicuously and with high transparency. After complete curing, Ottoseal S 50 Crystal-Clear Silicone is a highly transparent silicone sealant.

  • Acetate-curing RTV-1 silicone sealant
  • Cures to a crystal-clear sealant
  • UV-resistant
  • Very good weather resistance
  • Ageing resistance

Areas of application:

  • Bonding and sealing glass, plastics, aluminium, e.g. for glass ornaments, glazing bar bonding, in display cabinet and shop window construction
  • Small-area bonding

Pre-treatment:

Preparing the bonding surfaces. Compatibility: paints, varnishes, plastics and other coating materials must be compatible with the adhesive / sealant.

Cleaning: The bonding surfaces must be cleaned and any contamination, such as release agents, preservatives, grease, oil, dust, water, old adhesives / sealants and other substances that impair adhesion, must be removed.

Substrates: cleaner for non-porous ones. Cleaning should be carried out with OTTO Cleaner T, or other cleaners based on acetone or isopropanol, and with a clean, lint-free cloth. Cleaner for porous substrates: porous surfaces must be cleaned of loose particles mechanically, e.g. with a steel brush or a grinding disc.

Application:

Application temperature: +5ºC to +35ºC.
Application method: apply with a manual caulking gun, compressed-air gun or cordless gun.
Cleaning: with white spirit before curing, afterwards removable with silicone remover or mechanically.
Smoothing: with smoothing agent and scraper before a skin forms.

Special notes:

Because of its crystal-clear nature, OTTOSEAL S50 crystal-clear sealant is sensitive to smoothing agents. Slight milky clouding can form. If possible, do not smooth again, or use only a very heavily diluted smoothing agent solution. Good contact with the joint flanks must be achieved by pressing and smoothing. The full reaction depends, among other things, on the quantity of sealant and the ambient temperature. Do not use OTTOSEAL S50 in the following joints: those that are heavily walked on or driven on, those in direct contact with food (for this we recommend OTTOSEAL S27 food-grade silicone), in the area of sealing on structural glazing (no bonding; for this we recommend OTTOSEAL S7), underwater and for aquarium bonding (for this we recommend OTTOSEAL S28 Aquarium Silicone). OTTOSEAL S50 must not be used in connection with materials that can release cleavage products after some time, e.g. insulating paint and bitumen paint, EPDM. The sealant must not be applied directly to substrates that react with acetic acid; corrosion can occur during curing, particularly with brass, copper, lead, zinc, etc. Because of the many possible influences during processing and application, the
user must always carry out a trial application.

Storage:

12 months from the date of production in unopened packaging, stored cool (+5ºC and +25ºC) and dry. Close opened containers tightly and use up quickly. The specific use-by date can be found printed on the container and must be observed.

Supplied as:

310 ml PE cartridge (20 cartridges per carton)

Colours:

crystal clear

Technical data

Material: Silicone
Use
Merchandise group: Sealants
Application
Cleaning: The bonding surfaces must be cleaned and any contamination
What's included
Supplied as: 310 ml PE cartridge
Storage
Storage: 12 months from the production date in unopened packaging, stored cool (+5ºC and +25ºC) and dry
Product group: Construction silicone & window silicone

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

All products by OTTO Chemie

Information as of: 2026-09-17

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