131 Multiflex

Neutral · Silicone sealant
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Braun / Schwarz
dark brown Available for corporate customers
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iron grey Available for corporate customers
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Clean joints between windows and masonry

131 Multiflex is an odourless silicone sealant for assembling windows and doors. Thanks to its compatibility with a wide range of materials, it is ideal for sealing tempered glass, laminated safety glass and insulating glass in wood, metal and plastic frames, so it can even be used to joint safety glazing designed to prevent falls. 131 Multiflex is also suitable for outdoor use, as it does not suffer any mechanical damage from heavy UV radiation, temperature swings or moisture. The silicone does not damage mirror coatings and can also be used on ceramic finishes. Thanks to its ultra-elasticity, stronger mechanical stress and strain pose no problem. Whether in interior or exterior applications, the silicone maintains a strong hold – even without primer. 

Extra UV-resistant and weather-proof
Low emissions during the curing phase
Highly effective at absorbing motion thanks to elastic properties
Compatible with a very wide range of materials


  • Paint-compatible
  • Maximum movement accommodation: 25%
  • UV-resistant
  • Compatible with a wide range of materials
  • Elastic
  • Low-emitting
  • Fast-curing
  • Odourless
  • Resistant to weather and ageing
  • Compatible with laminated safety glass


  • LEED approved
  • DIN EN ISO 11600
  • DIN 18540
  • German Sustainable Building Council (DGNB)
  • for food areas
  • DIN 18545

Technical data

Tear strength
~ 3.78 N/mm (ISO 34-1)
Curing time
~1.8 mm/24 hours (at +23°C / 50 % relative humidity)
Neutrally cross-linking alkoxy System
Elongation at break
~ 220% (EN ISO 8339)
Temperature resistance
- 50°C to +150°C
Movement capability
approx. 25%
~ 7.5% (EN ISO 10563)
Shore hardness
~ 12 (EN ISO 868)
Processing temperature (substrate, environment)
+5° C to + 35°C
Storage life
12 months in a cool and dry place
~ 0.28 N/mm² (EN ISO 8339)
Skin over time
~ 4 min. (23°C/50 % relative humidity)
~ 1,01 (EN ISO 1183-1)
Stress at break
~ 0.40 N/mm² (EN ISO 8339)


Main applications

Illustration Glasfassade
Sealing and bonding safety glass to prevent falls
When working on safety glazing designed to prevent falls, the professional-grade materials must be compatible with laminated glass.
Illustration einer Fuge in Grün
Sealing expansion joints
An elastic sealant balances out tension between different structural elements.
Sealing windows and doors on the outside
Long-lasting perimeter joints in outdoor areas require resilient and elastic sealants.
Window seals
Weather-proof, easy-to-shape sealants provide attractive and functional joints for the long term.
Installing mirrors
Low-odour and fast-cure materials are suitable for sealing and bonding special types of glass and mirrors.
Sealing display glass
Fast-cure and moisture-tolerant materials are used to bond glass.

Other applications

Sealing cold room panels
When carrying out sealing work in cold storage facilities, the professional-grade materials have to meet some special requirements.
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Silicone, acrylic or hybrid – how do I choose the right sealant?
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