Fire Silicone B1 FR - Fire Rated Neutral Silicone

Fire Silicone B1 FR - Fire Rated Neutral Silicone

Soudal | Fire Rated Silicone Sealant

Soudal Fire Silicone B1 FR is a FIRE RATED, Neutral Cure Silicone Sealant.

Soudal Fire Silicone B1 FR is Solvent Free and Virtually Odourless with Primerless adhesion on all common construction materials (i.e glass, plastics, masonry substrates, metals and wood). High movement capability. Resistant to UV, rain, ozone and many chemicals.

Soudal Fire Silicone B1 FR Conforms to all international standards including CE Marking.

Soudal Fire Silicone B1 FR Conforms to the DIN4102 B1 standard for fire retardancy and has a fire rating of up to 4 hours in certain joint configurations (EN 1366 Part 4 NN713.020 – BS 476/20).

  • Very easy to apply

  • Colourfast and UV Resistant

  • Remains permanently elastic after full cure

  • Very good adhesion on most surfaces

  • Weatherproof

  • EN13501-1 - Reaction to Fire, Class E

  • ETAG-026 - Part 1, Part 3

  • EN1366-4 - Fire Resistance, up to 4 Hours depending on joint configuration.


Typical Applications:

  • For use in External and Internal Passive Fire Systems as an Elastic Joint Sealant.

  • Installation of Fire Retardant Window and Door Frames.

  • For use in Fire Retardant Expansion and Connection Joints, and Penetration Seals.

Surface Preparation:

Surfaces should be clean, dry, free of dust and grease.

Porous substrates should be primed with Soudal Primer 150. Soudal Surface Activator will improve adhesion on smooth surfaces.

We recommend a preliminary compatibility test.

Application Method:

  • Application Method: With a manual or pneumatic caulking gun. Finish with spatula or filling knife.

  • Cleaning: Clean uncured product with a white spirit immediately after use.

  • Finishing: With a soapy solution or Soudal Finishing Solution before skinning.

  • Repair: With the same material

Joint Dimensions:

  • Minimum Width for Joints: 5mm

  • Maximum Width for Joints: 30mm

  • Recommendation Sealing Jobs: Joint Width = 2 x Joint Depth.

Fire Testing


  • Test Report 9297: University of Ghent

  • NBN 713.020: EN 1366-4

  • BS 476:Part 20: Warrington Fire Research Report

  • DIN4102-B1: Institut für Bautechnik, Berlin

  • TNO-rapport 2000-CVB-R00703

 Test Results:

Test Report 9297
Wall Thickness Width of Joint Depth of Joint Application Fire Rating
100mm 11mm 10mm Doublesided 146min TI
Rating EI 120
202 min FR
Rating E 180
100mm 33mm 20mm Doublesided 116min TI
Rating EI 90
187 min FR
Rating E 180
200mm 11mm 10mm Doublesided >240 min TI
>240 min FR
Rating EI 240
200mm 31mm 20mm Doublesided 225 min TI
Rating EI 180
>240 min FR
Rating E 240

TI = Thermal Insulation; the time during which the temperature on the unexposed side of the wall does not rise by more than 180°C

FR = Flame Resistance; the time during which the joints stops flames from penetrating the wall

Fire Rating: Draft European Commission Decision RG N170 REV.1

Data Sheets

Technical Data Sheet

Declaration of Performance

Safety Data Sheet

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