Soudaduct® - HVAC Duct Sealant

Soudaduct® - HVAC Duct Sealant

Soudal | HVAC Duct Sealant

Soudal Soudaduct® is an HVAC Acrylic Polymer Based Elasto-plastic Sealant.

Soudal Soudaduct® is a low odour and solvent-free sealant that has very good adhesion on galvanised and stainless steel. It remains permanently flexible and is paintable.

  • Very easy to apply.

  • Low odour and solvent-free.

  • Colourfast and waterproof after curing.

  • Very good adhesion on galvanised and stainless steel.

  • Remains permanently flexible.

  • Conforms to Class C of DW144 and ISO11600 Class 12.5P.


Typical Applications:

Soudal Soudaduct® is used for the sealing of all types of HVAC duct systems including sheet metal, duct boards and flexible ducts.

Soudaduct® can also be used for the sealing of seams, spigot joints, flange joints and metal fabrications.

Surface Preparation:

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

Highly porous surfaces should be primed with a suitable primer.

This product is suitable for use on all kind of ducting materials.

We recommend a preliminary adhesion test.

Application Method:

  • Application Method: With a manual or pneumatic caulking gun. Finish with spatula or filling knife. Spread a minimum of 20 mm wet film thickness with a brush, or pump into well fitted joints. Seal all joints, seams, and penetrations in the duct-work to ensure an airtight system.

  • Cleaning: Clean uncured product with a water immediately after use. Cured Soudaduct® should only be removed mechanically.

  • 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: 20 mm

  • Minimum Depth for Joints: 5 mm

  • Recommendation Sealing Jobs: Joint Width = Joint Depth.


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

  • Do not apply when rain or frost is imminent

  • Soudaduct® can be painted over with most paints.

  • The paint should be sufficiently elastic to be applied on a plasto-elastic sealant. A preliminary test is recommended.

  • Prior to pressure testing allow 12 - 24 hours drying time depending on temperature, humidity and application thickness

  • Do not apply Soudaduct® outdoors.

Data Sheets

Technical Data Sheet

Declaration of Performance (DoP)

Safety Data Sheet

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£1.95 ex. VAT | £2.34 inc. VAT

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