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B1 hardly flammable silicone Premium DFS

The hardly flammable silicone sealant

The fischer B1 hardly flammable silicone Premium DFS is approved for fire protection between solid mineral building materials as per DIN 4102 Group B1. fischer DHS offers a high level of safety for usage between solid, mineral or metallic building materials. This enables the sealing of connection and expansion joints that are required to have a resistant effect against the spread of fire, water, smoke and poisonous fumes. Even components with increased fire behaviour requirements can be sealed with this product. The silicone sealant is also characterised by its good processing properties and ease of application and smoothing.

Product Description

  • The good fire-inhibiting properties provide maximum safety for the sealing of solid, mineral or metal building materials.
  • Non-corrosive, thus can be used on aluminium, copper and zinc-plated surfaces. This guarantees problem-free use within the metal processing industry.
  • The neutral interlacing silicone with an alkoxy base is extremely low-odour and is therefore ideal for use in confined spaces.

Available Product Variants


Application and Permission

  • Sealing connection and expansion joints that are required to have a fire-resistant effect against the spreading of fire, water, smoke and poisonous fumes
  • Sealing components that have increased requirements concerning their properties in the case of fire
Building materials
  • Concrete
  • Chrome
  • Stainless steel
  • Anodised layer
  • Enamel
  • Tiles
  • Glass, glazed surfaces
  • Ceramics
  • Copper, brass
  • Masonry
  • Polyester
  • Steel
  • Zinc
* You can find detailed information on building materials in the registration document.

Assembly Instruction

  • Chemical base: 1-component silicone neutral alkoxy
  • Hardly flammable material (building material class DIN 4102-B1) in line with DIN 4102-1
  • Permanently elastic
  • Low-odour
  • Skin formation time: approx. 25 minutes
  • Processing temperature: +5°C to +40°C
  • Temperature resistance: -40°C to +120°C
  • Non-corrosive
  • Very good resistance to weather, ageing and UV
  • Compatible with paint
  • Not paintable

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