Soudal Silirub ® HT°A - High Temperature Acetoxy Silicone

Soudal Silirub ® HT°A - High Temperature Acetoxy Silicone

Soudal | High Temperature Silicone Sealant

Soudal Silirub ® HT-A° is a High Temperature Resistant Acetoxy Silicone Sealant.

Soudal Silirub ® HT-A° can withstand high temperatures up to 285°C, it's highly flexible and is weatherproof.

Soudal Silirub ® HT-A° has primerless adhesion on many common construction materials including glass, ceramic, porcelain, metals and wood.

Soudal Silirub ® HT-A° is resistant to UV, rain, snow, ozone and many chemicals and has high movement capability.


Soudal Silirub ® HT°A - High Temperature Acetoxy Silicone

  • Permanent elastic after curing

  • High Modulus

  • High Temperature resistance up to 285°C

  • Excellent adhesion on metals, glass and glazed substrates


Areas for Use:

  • For the sealing of elastic joints which require a high temperature resistance (i.e gaskets, hot water installations, pipework, ovens, furnaces and chimney flues).

  • Suitable for external and internal applications.

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.

Not suitable for use on concrete or PVC.

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.

  • Direct contact with the secondary sealing of insulating glass units (insulation) and the PVB-film of safety glass must be avoided.

  • 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.

  • Do not use in applications where continuous water immersion is possible

Data Sheets

Technical Data Sheet

Safety Data Sheet

More on this product...

£4.80 ex. VAT | £5.76 inc. VAT

  • Reviews

Related Items

  • £4.80 ex. VAT | £5.76 inc. VAT