Soudal Silirub 2 - Premium Neutral LMN Silicone

Soudal Silirub 2 - Premium Neutral LMN Silicone

Soudal | Silicone Sealant

Neutral Cure Silicone Sealant

Soudal Silirub 2 is a Premium Low Modulus Neutral Cure, 100% Pure Silicone Sealant which can be used for a wide range of sealing applications in the building industry. Regarded as one of the best Silicone Sealants on the market, Silirub 2 has primerless adhesion on all common construction materials including glass, PVC, plastics, masonry substrates, metals and wood.

Supplied in 300ml Cartridges, available in Brilliant White and Clear.


Soudal Silirub 2

Soudal Silirub 2 is a Premium Low Modulus Neutral Cure Silicone Sealant. Virtually odourless, 100% Pure Silicone with no extension.

Soudal Silirub 2 has a very fast skinning time and final cure with very low dirt pick-up and no shrinkage during curing. Excellent break off and tooling.

Soudal Silirub 2 has primerless adhesion on all common construction materials including glass, plastics, masonry substrates, metals and wood. High movement capability and is resistant to UV, rain, snow, ozone and many chemicals.

Soudal Silirub 2 has been independently tested to ISO 11600 F&G 25 LM.

Product Benefits:

  • 100% Pure Silicone.

  • Very easy to apply.

  • Colourfast and UV Resistant.

  • Permanent elastic after curing.

  • Very good adhesion on many materials.

  • Low Modulus.

  • Corrosion Free.

Typical Applications:

  • Glazing, construction and industrial sealing applications.

  • Perimeter sealing of wood, PVCu and aluminium window and frames.

  • Weathersealing of aluminium glazing systems, curtain walling and facade panels.

  • Sealing of roofline and drainage systems.

  • Can be used in direct contact with all types of glass, except self cleaning types.

  • Bedding of double glazed sealed units in wet glazing applications.

  • Sealing of expansion and movement joints in construction.

  • Roofing seals including lead, roofing slates and fibre-cement.

  • Industrial sealing applications; coated metals, anodized aluminium, stainless steel.

  • HVAC Ducting, pipework and drainage joints.

  • General maintenance of sealing cars, caravans, mobile homes and boats.

Compatibility with Glass:

Tests carried out in laboratories show that Silirub 2 is compatible with most edge seals of insulating double glazing and conventional PVB films.

External testing at TÜV Rheinland have shown no visual defects or no other inconsistencies that were found between the secondary seal or PVB film and Silirub 2 after exposure to high temperature and humidity (Report No. 12490R-a-89202273).

Due to the large number of edge sealing systems on the market, it is impossible to test the compatibility of all combinations with glazing sealants.


Surface Preparation:

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

Porous surfaces in water loaded applications should be primed with Soudal Primer 150. No primer needed for non-porous substrates.

There is no adhesion on PE, PP, PTFE (Teflon®) and bituminous substrates. We recommend a preliminary compatibility test.

Application Method:

  • Application Method: With a manual or pneumatic caulking gun.

  • Cleaning: Clean with a Surface Cleaner 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: 5 mm

  • Maximum Width for Joints: 30 mm

  • Minimum Depth for Joints: 5 mm

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


  • Do not use on natural stones like marble, granite etc... as it may cause staining.

  • Not recommended for use on Polycarbonate (Use Silirub AL2T)

  • A total absence of UV can cause a colour change of the sealant.

Data Sheets

Technical Data Sheet

Declaration of Performance (DoP)

Safety Data Sheet

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