SOUDAL Soudaduct Duct Sealant – DW144 Class C

SOUDAL Soudaduct is a high‑quality, plasto‑elastic, acrylic polymer HVAC duct sealant designed for sealing metal ductwork in heating, ventilation and air‑conditioning systems. The solvent‑free formulation is low odour, easy to apply and provides a durable, airtight seal that remains permanently flexible after curing.

Manufactured to meet the requirements of DW144 Class C, Soudaduct is ideal for use on galvanised and stainless‑steel duct systems where reliable air tightness and long‑term performance are essential.

Key Features & Benefits

Conforms to DW144 Class C and ISO 11600 Class 12.5P standards
Acrylic polymer, solvent‑free formulation – low odour and safe to use indoors
Excellent adhesion to galvanised steel and stainless steel
Remains permanently flexible to accommodate joint movement up to approx. 12–15%
Colour‑fast and waterproof once cured
Paintable after curing (with suitably elastic paints)

Typical Applications

Sealing HVAC duct systems including sheet metal ducts, duct board and flexible ducts
Sealing seams, joints, spigots and flanges in metal ductwork
Airtight sealing of duct penetrations and fabrications
Suitable for use where compliance with DW144 air‑leakage standards is required

Application & Use

Soudaduct can be applied using a brush, hand caulking gun or pneumatic gun. For optimal performance, a minimum 20 mm wet film thickness should be applied over joints and seams to ensure an airtight seal. Application temperature should be between +5 °C and +30 °C.

Uncured sealant can be cleaned with water; once cured, removal is mechanical only.

Product Summary

Soudal Soudaduct DW144 is a professional‑grade duct sealant trusted by HVAC installers for its strong adhesion, flexibility and compliance with recognised ductwork standards. An ideal choice for creating airtight, durable HVAC duct systems in commercial and industrial environments.

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