{"title":"HVAC Duct Sealants","description":"\u003cp\u003eDuct joints leak under pressure, and a general purpose sealant does not last there. These sealants are made for air handling work. Adheseal HV Duct seals high-velocity air ducts and sheet metal seams with fire test data to AS\/NZS 1530.3. Ductmate Proseal brushes onto metal joints in low to high pressure systems up to 15 inches water gauge. FulasealPro 840NS stays permanently plastic inside concealed panel joints on cool rooms and insulation panels.\u003c\/p\u003e\u003cp\u003eMatch the sealant to the joint: fire rated duct seams, pressure rated duct joints, or non drying panel laps. All three stay flexible after the job is done.\u003c\/p\u003e","products":[{"product_id":"hv-duct-high-velocity-duct-sealant","title":"Adheseal HV Duct Acrylic Sealant","description":"\u003cdiv role=\"main\"\u003e\n\u003cp\u003eFor high-velocity air ducts, seams, and metal sheet joints where fire rating and draft control are required, Adheseal HV Duct Acrylic Sealant provides a high-strength, dust-proof barrier. Tested to AS\/NZS 1530.3, it achieves a Smoke Developed Index of 3, helping HVAC installations comply with fire safety standards while preventing air leakage in high-pressure systems.\u003c\/p\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eHV Duct is a single-component acrylic polymer that cures through moisture loss. Once applied, it forms a permanently elastic gasket that absorbs vibration and accommodates up to ±5% joint movement. In hot and humid environments, the cured sealant resists mould, mildew, and biological growth. The formulation is low-VOC (22 g\/L) to meet Green Star environmental criteria, completely odourless once cured, and will not corrode galvanised steel, zinc-coated steel, or concrete.\u003c\/p\u003e\n\u003ch3\u003eNumbers that matter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e±5% joint movement\u003c\/strong\u003e — accommodates minor expansion and contraction in duct seams and metal panels without cracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmoke Developed Index of 3\u003c\/strong\u003e — tested to AS1530.3 (with 0 Spread of Flame and 11 Ignitability Index) for fire-rated building and HVAC assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-5°C to 80°C service temperature\u003c\/strong\u003e — maintains seal integrity and flexibility under typical mechanical duct operating temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 to 20 minutes skin time\u003c\/strong\u003e — fast-skinning formula at 25°C that allows quick sealing before a dust-resistant skin forms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e22 g\/L VOC\u003c\/strong\u003e — low-emission formulation meeting Green Star requirements for indoor air quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere to use it\u003c\/h3\u003e\n\u003cp\u003eHV Duct is suitable for both internal and external applications. It has excellent adhesion to metal, aluminium, and polystyrene foam without causing degradation. Common applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHVAC, air conditioning, and ventilation ductwork.\u003c\/li\u003e\n\u003cli\u003eSealing metal sheets to ductwork and other building components.\u003c\/li\u003e\n\u003cli\u003eBus, truck, and trailer body assembly.\u003c\/li\u003e\n\u003cli\u003eDust extraction systems.\u003c\/li\u003e\n\u003cli\u003eSealing around aluminium window frames.\u003c\/li\u003e\n\u003cli\u003eJoints in contact with Neoprene Sponge Foam Tapes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLimitations\u003c\/h3\u003e\n\u003cp\u003eDo not use HV Duct in the following scenarios:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo not apply below 5°C or above 35°C.\u003c\/li\u003e\n\u003cli\u003eDo not expose to continuous water flow, underwater applications, swimming pools, or below-grade installations.\u003c\/li\u003e\n\u003cli\u003eDo not apply in wet or damp conditions. External applications must be protected from rain for up to three days.\u003c\/li\u003e\n\u003cli\u003eDo not use in totally confined spaces; the sealant requires atmospheric humidity to cure.\u003c\/li\u003e\n\u003cli\u003eDo not use for structural glazing (use N-80 or N-60 Glazing silicone instead).\u003c\/li\u003e\n\u003cli\u003eDo not use for adhering mirrors (use High Power 609 instead).\u003c\/li\u003e\n\u003cli\u003eDo not use on composite panels without testing (Adheseal recommends \u003ca href=\"\/products\/adheseal-hi-flex-60\"\u003eHi Flex 60\u003c\/a\u003e, subject to pre-testing).\u003c\/li\u003e\n\u003cli\u003eDo not use in aquariums.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplication and installation\u003c\/h3\u003e\n\u003cp\u003eAll surfaces must be structurally sound, dry, clean, and free of dust, grease, curing compounds, or surface water. For non-porous substrates, clean using the two-wipe process with 100% White Spirits. Adhesion testing is recommended. Where a primer is required, use Adheseal 50A for non-porous substrates and Adheseal 2001 for porous substrates.\u003c\/p\u003e\n\u003cp\u003eWhen applying as a sealant, cut the nozzle at a 45° angle and apply in a continuous bead, pushing the sealant ahead of the nozzle to ensure contact with both joint faces. When applying as an adhesive to bond two surfaces, cut a wedge in the nozzle to dispense a triangular bead, then compress the assembly to a minimum thickness of 2mm.\u003c\/p\u003e\n\u003cp\u003eTool the joint with a moistened spatula within 5 minutes of application, before the skin forms. Remove masking tape while the sealant is still wet. Incompatible substrates may cause discolouration or premature degradation; always conduct a compatibility test before full application.\u003c\/p\u003e\n\u003ch3\u003eClean up\u003c\/h3\u003e\n\u003cp\u003eClean tools and wet spills immediately with water. Cured sealant cannot be dissolved and must be removed by mechanical means.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Adheseal","offers":[{"title":"Single Buy","offer_id":39423168938176,"sku":"HVDUCT\/CTG","price":4.81,"currency_code":"AUD","in_stock":true},{"title":"Box Buy (20)","offer_id":39423168970944,"sku":"HVDUCT\/CTG\/BOX","price":86.6,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0507\/3630\/0224\/files\/hv-duct-acrylic-sealant-fire-rated-hvac-adheseal.png?v=1763706120"},{"product_id":"h-b-fuller-fulasealpro-840ns","title":"H.B Fuller FulasealPro 840NS Sealant","description":"\u003cdiv role=\"main\"\u003e\n \u003cp\u003eFor cool room construction, refrigerated container components, and insulation panel installations, FulasealPro 840NS Sealant is a non-skinning, butyl-based sealant that creates a permanently plastic, moisture-resistant barrier. Formulated to remain wet and sticky inside concealed lap joints, it seals sandwich panels, Alucobond, and metal substrates without drying out, skinning, or cracking over time.\u003c\/p\u003e\n\n \u003ch3\u003eHow it works\u003c\/h3\u003e\n \u003cp\u003eFulasealPro 840NS Sealant operates as a non-drying, permanently plastic sealant. Unlike standard elastomeric curing sealants, this butyl compound remains in a constant paste-like state, ensuring it does not skin or lose its tackiness inside closed assemblies. When clamped between sheet metal, Polystyrene, or Alucobond panels, the non-skinning formulation flows into small gaps to block air and moisture infiltration while resisting the growth of mould and mildew in damp or temperature-controlled environments. Because the chemistry is non-corrosive, it is safe for direct contact with sensitive metals like Zincalume, aluminium, and galvanised iron without the risk of chemical degradation or surface etching. It will not separate or bleed when applied to non-porous surfaces.\u003c\/p\u003e\n\n \u003ch3\u003eNumbers that matter\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e-40°C to +50°C service temperature:\u003c\/strong\u003e Maintains its physical properties and sealing performance in extreme cold, preventing the joint barrier from freezing or failing in commercial refrigeration units and deep-freeze cool rooms.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e15 lineal metres coverage:\u003c\/strong\u003e Yields approximately 15 metres of a 5mm bead per cartridge, allowing accurate material estimation for long panel runs and lap joints.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e+5°C to +35°C application temperature:\u003c\/strong\u003e Defines the safe environmental window for gunning the sealant onto cold or warm substrates during panel assembly.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eIndefinite shelf life:\u003c\/strong\u003e Stored between +5°C and +25°C in unopened packaging, the product remains usable without a strict expiration date, reducing stock waste.\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eWhere to use it\u003c\/h3\u003e\n \u003cp\u003eFulasealPro 840NS Sealant is formulated for small joints and concealed applications on the following substrates:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eSteel, Stainless Steel, Galvanised iron, Zincalume, and Aluminium\u003c\/li\u003e\n \u003cli\u003eSandwich Panels and Alucobond\u003c\/li\u003e\n \u003cli\u003ePolystyrene and Fiberglass\u003c\/li\u003e\n \u003cli\u003eMost plastics (requires pre-testing)\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eLimitations\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eNon-elastomeric:\u003c\/strong\u003e Not suitable for joints where movement is expected, or in applications subject to dynamic stress.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eNo exposed weathering:\u003c\/strong\u003e Not suitable where the sealant is exposed to direct weathering or dirt pick-up; use HB Fuller 770 Sanitary Silicone to seal these exposed areas.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eVibration limits:\u003c\/strong\u003e Not suitable for applications involving constant vibration, such as caravans or truck bodies.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eNon-paintable:\u003c\/strong\u003e This product cannot be painted over.\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eApplication clean-up and preparation\u003c\/h3\u003e\n \u003cp\u003eAll surfaces must be clean, dry, sound, and free of dust, oil, old sealant, or other contaminants before application. Clean lightly contaminated surfaces using the two-rag wipe method with Isopropyl Alcohol (IPA) on a clean, lint-free cloth, ensuring the solvent does not dry directly on the substrate. For heavily contaminated surfaces, clean first with a generic wax and grease remover using the two-rag wipe method, followed by a final IPA clean.\u003c\/p\u003e\n \u003cp\u003eApply the sealant to one surface by holding the gun at a 45-degree angle and pushing the bead forward, then immediately combine the two surfaces. Uncured sealant can be cleaned up using an organic solvent such as mineral spirits.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"H.B Fuller","offers":[{"title":"Box Buy (20)","offer_id":45216519749824,"sku":"FULASEAL\/CTG\/BOX","price":175.8,"currency_code":"AUD","in_stock":true},{"title":"Single Buy","offer_id":46057578922176,"sku":"FULASEAL\/CTG","price":9.77,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0507\/3630\/0224\/files\/fulasealpro-840ns-non-skinning-sealant-coolroom-adheseal.png?v=1763710905"},{"product_id":"ductmate-proseal-water-based-high-velocity-duct-sealant","title":"Ductmate Proseal®","description":"\u003cp\u003eDuctmate 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.\u003c\/p\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eProseal 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.\u003c\/p\u003e\n\u003ch3\u003eNumbers that matter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 15 in. wg\u003c\/strong\u003e - seals duct systems from low to high pressure, up to 15 inches water gauge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL 181B-M Listed, UL 723 Classified\u003c\/strong\u003e - tested duct product listing and classification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService temperature -25°F to 220°F\u003c\/strong\u003e (about -32°C to 104°C).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGREENGUARD Gold certified\u003c\/strong\u003e - low emissions, meets CDPH and SCAQMD test methods, LEED compliant for the EQ 4.1 credit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 sq ft per gallon at 1\/16 in\u003c\/strong\u003e (about 0.6 m\u003csup\u003e2\u003c\/sup\u003e per litre), or 50 sq ft per gallon at 1\/32 in (about 1.2 m\u003csup\u003e2\u003c\/sup\u003e per litre).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCure time 24 to 72 hours\u003c\/strong\u003e - depends on humidity, temperature and film depth. Touch dry in about 1 hour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVOC content passes EPA Method 24\u003c\/strong\u003e - very low, with no added solvents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere to use it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJoints on spiral, rectangular and round sheet metal ductwork.\u003c\/li\u003e\n\u003cli\u003eSupply and return ducts in low, medium and high-pressure HVAC systems.\u003c\/li\u003e\n\u003cli\u003eIndoor and outdoor duct systems (indoor\/outdoor grade).\u003c\/li\u003e\n\u003cli\u003eAssemblies built to NFPA 90A and 90B ductwork installation requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eSurfaces 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.\u003c\/p\u003e\n\u003ch3\u003eClean up\u003c\/h3\u003e\n\u003cp\u003eClean tools with water while the sealant is wet. Cured sealant must be removed mechanically.\u003c\/p\u003e\n\u003ch3\u003eRelated\u003c\/h3\u003e\n\u003cp\u003eNeed a fire rated acrylic sealant for duct seams? See \u003ca href=\"\/products\/hv-duct-high-velocity-duct-sealant\"\u003eAdheseal HV Duct Acrylic Sealant\u003c\/a\u003e, tested to AS\/NZS 1530.3.\u003c\/p\u003e","brand":"Ductmate","offers":[{"title":"Default Title","offer_id":46314156425408,"sku":"DUCTMATE","price":29.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0507\/3630\/0224\/files\/Ductmate-Proseal-Product-Image.png?v=1754479979"}],"url":"https:\/\/adheseal.com.au\/collections\/hvac-duct-sealants.oembed","provider":"Adheseal","version":"1.0","type":"link"}