Soudal Silirub ® AL2T - Premium LMN Silicone for Polycarbonate

Soudal Silirub ® AL2T - Premium LMN Silicone for Polycarbonate

Soudal | Silicone Sealant

Soudal Silirub ® AL2T is a Premium Grade, Low Modulus Alcoxy Neutral Cure 100% Silicone Sealant which is suitable for use on Polycarbonate and other 'difficult' plastic materials.

Soudal Silirub ® AL2T does not cause stress cracking on Polycarbonate unlike many other Silicone Sealants.

Soudal Silirub ® AL2T maintains a permanent colour, it's UV Resistant and stays elastic after curing.

Soudal Silirub ® AL2T has very good adhesion on most traditional construction materials. It is virtually odourless and has primerless adhesion on most building surfaces.


Soudal Silirub ® AL2T - Premium LMN Silicone for Polycarbonate

  • 100% Pure Silicone

  • Low modulus Alcoxy Neutral Cure Silicone

  • Does not stress crack Polycarbonate

  • Slow skinning time - Can do larger areas at one time.

  • Colourfast and UV Resistant

  • Conforms to ISO 11600 F&G 25 LM

  • Very good adhesion on many materials

  • Low odour


Typical Applications:

Soudal Silirub® AL2T is used for sealing between polycarbonate, treated wooden and metal profiles and glass.

Soudal Silirub® AL2T is used for sealing all usual building joints with high movement, and for sealing expansion joints between many different construction materials.

Compatibility with Glass:

Avoid direct contact between Silirub® AL2T Neutral Alcoxy Silicone and the secondary sealant of IGU or the PVB foil in safety glass.

Preferably use Silirub® 2 for these types of applications, in accordance with the processing requirements of the DTU39 for carpentry and glazing works, according to the standards and recommendations of the certifiers SNJF, CEKAL.

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 suitable for bonding mirrors. Use Soudaseal® Mirror for this type of application.

  • Given the great diversity of possible surfaces it is recommended to do an adhesion test prior to application.

  • In an acid environment or in a dark room, white silicone can slightly turn yellow. Under the influence of sunlight it will turn back to its initial colour.

  • When finished with a finishing solution or soapy solution, make sure that the surfaces are not touched by this solution. This will cause the sealant not to adhere to that surface. Therefore we recommend to only dip the finishing tool in this solution.

  • We strongly recommend not to apply the product in full sunlight as it will dry very fast.

Data Sheets

Technical Data Sheet

Safety Data Sheet

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£3.55 ex. VAT | £4.26 inc. VAT

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