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Soudaduct is a high-quality, plasto-elastic, solvent free HVAC ducting sealant for all types of metal ducts.


  • Very easy to apply
  • Low odour and solvent free
  • Colour-fast and water-proof after curing
  • Very good adhesion on galvanised and stainless steel
  • Remains permanently flexible
  • Conforms to Class C of DW144 and ISO11600 Class 12.5P


  • All types of HVAC duct systems including sheet metal, duct board and flexible ducts
  • Sealing of seams, spigot and flange joints and metal fabrications
  • Joints with movements up to 15%.


Method: Apply the sealant by means of a brush, handheld or pneumatic caulking gun. 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 ductwork to ensure an airtight system.

Application temperature: +5°C to +30°C

Clean: Uncured Soudaduct may be removed from tools with water. Cured sealant must be removed mechanically.

Repair: with Soudaduct


  • 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

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