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Fire-retardant silicone SIL 240
Fire-retardant silicone  SIL 240  - 1
Fire-retardant silicone  SIL 240  - 2

For detailed information, other images and documents, please select individual articles from the following table.

Fire-retardant silicone SIL 240

Fireseal - passive fire protection systems
Fire resistant to EI 240

  • Contents: 310 ml
  • Ultraviolet resistance: Yes
  • Shelf life from production: 18 Month
  • Conditions to maintain shelf life from production: at 5°C to 35°C
  • Shore A hardness: 25
  • Chemical basis: Neutrally networked silicone polymer
  • Full curing speed: 2 mm/d
  • Density: 1.4 g/cm³
  • Min. skin-formation time: 20 min

See product details

Available in 3 versions

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You can refine your search by selecting different attributes

Art.-no. Colour Fire resistance rating Container Stretch capacity Quantity PU
Black EI240 Cartridge 25 %
Grey EI240 Cartridge 25 %

Packaging unit

The packaging unit defines the number of articles in one packaging. In the catalog segment you can choose from different packaging units if a pop-up menu is displayed.

Just leave the field empty if you don't know the packaging unit when directly entering the article number in the shopping basket or when importing with Easy-/VarioScan. The packaging unit will be determined automatically.

Structure of our article number

The article number is made up of the following: VVVVAAABBB
VVVV = 4 digits for prefix number (please note that the first digit is currently always 0)
AAA = 3 digits for dimension part 1
BBB = 3 digits for dimension part 2

Example article number structures:
Example 1: Screw with dimensions of 4x10 mm:
00574 10 (2 spaces between the 4 and the 10)

Example 2: Screw with dimensions of 10x20 mm:
005710 20 (1 space between the 10 and the 20)

Example 3: Flat washer with an internal diameter of 6 mm:

Information on price display

Price per packaging unit (PU):
The displayed price is always in line with the displayed packaging, if the PU is 250 the price for 250 units, if the PU is 300 the price for 300 units.

Price with price key representation (PSL):
The price always applies to a quantity ruled through the price key:
Price for 1 unit
Price for 100 units
Price for 1000 units


The quantity shows the number of pieces or units of measure contained in the order or delivery for the respective article.
In contrast to sales packaging and secondary packaging, the disposal costs for chemical-technical products are shown separately. The breakdown of the individual costs can be found on the relevant products and also in the shopping cart, as well as in our General Terms and Conditions (GTC).
Art.-no. Cust. Mat. No.

Hazardous Material

Product information

Würth Catalogue

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Technical information

Exclusively for trade customers

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Prices for customers after login

  • For the sealing of linear joints

  • Elastic, single component silicone, for a perfect seal against the spreading of smoke, toxic fumes, heat and flames through walls and compartment floors

  • To be used combined with rock wool, in order to obtain EI fire resistance values

  • Excellent elasticity

  • Optimal adhesion, even on porous materials such as concrete, gypsum plasterboard, etc.

  • CANNOT be painted over

  • Resistant to ageing and weathering, good resistance to UV rays, odourless

  • Not recommended for plastic materials such as PE, PP, PTFE, or for sealing areas constantly in contact with water, or for horizontal wall joints, glueing of mirrors, marble or natural stone

  • High resistance to fire, up to 240 minutes (depending on the type of joint)

  • Can be used for joints of any lengths

  • Long fire resistance times even in walls only 100 mm thick – other brands would require larger thicknesses which are usually not found on a building site, and that invalidates certification of those products

  • Can be used not only for floors, but also for walls made of concrete, gypsum plasterboard and of solid and hollow bricks, as long as they have a minimum thickness of 100 mm

  • Thanks to its elasticity, it adapts easily to the different geometries of the joints

  • Simple to handle and to apply: can be applied using a classic silicone extrusion gun

  • Yield of one cartridge: ca. 3 m (for a 10 x 10 mm seal)

Certificates: www.wuerth.it/fireseal

Observe the positioning specifications in each case

Because the material is not intumescent, it is not suitable for the fire-retardant sealing of joints containing pass-through elements (pipes, cables, etc.). Use other Fireseal systems