Ductmate Proseal is a water-based duct sealant for metal duct joints. It seals low, medium and high-pressure HVAC systems against air leakage, including systems up to 15 inches water gauge.
How it works
Proseal is a synthetic latex compound. Brush it onto clean joints and it dries to a flexible film that does not crack or sag. The cured film resists water, mould and humidity. It stays permanently flexible and takes latex paint. The wet odour is mild and the cured film is odourless.
Numbers that matter
- Up to 15 in. wg - seals duct systems from low to high pressure, up to 15 inches water gauge.
- UL 181B-M Listed, UL 723 Classified - tested duct product listing and classification.
- Service temperature -25°F to 220°F (about -32°C to 104°C).
- GREENGUARD Gold certified - low emissions, meets CDPH and SCAQMD test methods, LEED compliant for the EQ 4.1 credit.
- 25 sq ft per gallon at 1/16 in (about 0.6 m2 per litre), or 50 sq ft per gallon at 1/32 in (about 1.2 m2 per litre).
- Cure time 24 to 72 hours - depends on humidity, temperature and film depth. Touch dry in about 1 hour.
- VOC content passes EPA Method 24 - very low, with no added solvents.
Where to use it
- Joints on spiral, rectangular and round sheet metal ductwork.
- Supply and return ducts in low, medium and high-pressure HVAC systems.
- Indoor and outdoor duct systems (indoor/outdoor grade).
- Assemblies built to NFPA 90A and 90B ductwork installation requirements.
Application
Surfaces must be clean, dry and free of grease. Apply between 35°F and 110°F (about 2°C to 43°C). Follow SMACNA practice: sealant goes inside female fittings and outside male fittings. The film is touch dry in about 1 hour and fully cures in 24 to 72 hours. Paint with latex paint after full cure.
Clean up
Clean tools with water while the sealant is wet. Cured sealant must be removed mechanically.
Related
Need a fire rated acrylic sealant for duct seams? See Adheseal HV Duct Acrylic Sealant, tested to AS/NZS 1530.3.
What duct pressure is Proseal designed for?
It seals low-, medium- and high-pressure HVAC systems up to 15 inches water gauge.
How long should it cure before pressure testing?
Allow approximately 24 to 72 hours depending on temperature, humidity and film depth.
Is it UL listed?
It is UL 181B-M Listed and UL 723 Classified.
Can it be applied below freezing?
No. The documented minimum application temperature is about 2°C.
- Galvanised and other compatible sheet-metal ductwork.
- Spiral, rectangular and round metal duct systems.
- UL 181 listed flexible air-duct connection points.
Ductmate Proseal® Physical Properties
| Property | Value |
|---|---|
| Application Temperature (Minimum) | 2°C |
| Cure Time (Initial) | 24-72 hours |
| Pressure Rating | Up to 15 inches Water Gauge |
| Application Thickness (Sheet Metal) | 1/32 inch (0.8 mm) wet |
| Application Thickness (Flexible Duct) | 1/16 inch (1.6 mm) wet |
| Water Resistance | Excellent, once fully cured |
| Paintable | Yes, with latex or epoxy paints |
| Standards Met | UL 181B-M, UL 723, NFPA 90A/B |
| VOC Content | Low |