Everbuild Galva Mate Galvanised and Metal Duct Sealant 295ml 489540 GALVAM

Everbuild Everflex Galva Mate Galvanised and Metal Duct Ducting Sealant Grey 295ml Tube

Barcode: 5029347000707

Sika Code: 489540

MPN: GALVAM

Colour: Grey

Size: 295ml Tube

Overview:

Everbuild Galva Mate is a specialist grey duct sealant designed for high-velocity heating and ventilation systems. This solvent-free adhesive and sealant bonds strongly to galvanised and stainless steel ductwork, joints and ventilation grilles, delivering an airtight, long-lasting seal. The low-slump formula stays where it’s applied, even on vertical seams, while remaining permanently flexible to accommodate vibration and thermal movement in HVAC systems. Containing a high level of fungicide, it helps resist mould growth in humid plant rooms and duct runs, and can be overpainted once cured for a neat, professional finish.

Key Features

• High-performance sealant for high-velocity ductwork and HVAC systems

• Excellent adhesion to galvanised and stainless steel ducting and fittings

• Very good slump resistance for clean beads on vertical and overhead joints

• Permanently flexible to cope with vibration and thermal expansion

• Contains fungicide to reduce mould growth in areas of high humidity

• Solvent-free acrylic water-based paste – low odour and easy to gun

• Over-paintable once fully cured for a discrete, colour-matched finish

• Certified to EN15651 for façade interior applications

Specifications

• Brand: Everbuild (Sika)

• Range: Everflex / Specialist duct sealant 

• Product Name: Everbuild Galva Mate Galvanised and Metal Duct Sealant

• Sika Code: 489540 

• MPN: GALVAM 

• Barcode (EAN): 5029347000707

• Chemical Base: Acrylic water-based paste 

• Density: Approx. 1.64–1.70 g/cm³ 

• Solid Content: ~80% 

• Shore A Hardness: ~30 (cured)

• Movement Capability: Low to medium, approx. ±5%

• Service Temperature: Approx. –15°C to +75°C

• Ambient Application Temperature: +4°C to +40°C

• Tack-Free Time: Approx. 15–60 minutes, dependent on conditions

• Curing Time: Typically 3–5 days to full cure (thickness & climate dependent

• Shelf Life: Up to 36 months from date of manufacture

• Storage Conditions: Cool, dry, 5–25°C, protect from frost

• Approvals / Standards: EN15651 façade interior applications (low-modulus sealant

• Country of Origin: UK

Applications

• Sealing high-velocity HVAC duct runs and fabricated galvanised ductwork joints

• Airtight sealing around ventilation grilles, plenums and duct fittings

• Joints and seams on stainless steel and galvanised metal ducting

• Plant room duct sealing in high-humidity environments (with fungicidal protection)

• General specialist duct sealing where a flexible, over paintable grey seal is required

How to Use

• Ensure all duct faces, joints and flanges are clean, sound and free from dust, oil, loose coatings and old mastic. Remove loose rust and failing sealant.

• Cut the cartridge tip, fit the nozzle and trim to the required bead size. Load into a standard sealant gun.

• Apply a continuous bead along the joint, seam or flange, ensuring good contact with both sides of the joint.

• Tool the sealant immediately using a suitable spatula or gloved finger to compact it into the joint and achieve a smooth finish.

• Allow the sealant to skin (typically 15–60 minutes) and cure fully (around 3–5 days) before subjecting the ducting to full service conditions.

• Always read the latest Product Data Sheet and Safety Data Sheet before use, and wear appropriate gloves and eye protection.

Everbuild Galva Mate Duct Sealant – Key FAQs

• What is this sealant mainly designed for?
  It’s specifically formulated for sealing high-velocity metal ductwork and associated HVAC components such as joints, seams and ventilation grilles in heating and ventilation systems.

• Will it stick to galvanised and stainless steel?
  Yes, the formulation is designed to adhere strongly to galvanised and stainless steel surfaces, making it ideal for modern spiral and rectangular duct systems.

• Is the sealant flexible once cured?
  It remains permanently flexible with a low-to-medium movement capability of around ±5%, helping it accommodate vibration and thermal expansion without cracking.

• Can it be painted after application?
  Yes, once fully cured it can be overpainted with many conventional coatings. Always test compatibility on a small area first, and allow sufficient curing time before painting.

• How long does it take to cure fully
  It typically reaches tack-free in 15–60 minutes and achieves full cure within about 3–5 days, depending on joint depth, temperature and humidity.

• Is it suitable for humid or condensate-prone areas?
  Yes. It contains a high level of fungicide to help resist mould growth in high-humidity environments, making it well suited to plant rooms and ductwork carrying moist air.

Everbuild Galva Mate Information:

"Always read the Technical Datasheet prior to first use to ensure you have the correct information and  product for your application"

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