Aeroseal Duct Sealing in Singapore
Seal duct leaks from the inside. No dismantling, no ceiling removal, no downtime.
- Minimum duct replacement
- Measurable energy savings
- Fast, non-disruptive process
- Proven globally
- Certified Aeroseal partner
- bizSAFE certified
Tell us about your HVAC challenges. We’ll come back with a scope & a price within 2 business days. No Obligation.
How Aeroseal Duct Sealing Works
Aeroseal is an aerosol duct sealing technology. The system pressurises your ductwork and releases a fine mist of sealant. As air escapes through the leaks, it carries the particles to the gaps, which build up and close from the inside.
Nothing is opened up. No ceilings removed, no ductwork dismantled, and the leak rate is measured before and after so you see exactly what changed.
Why Aeroseal, and Not Mastic, Tape, or Coatings
Mastic and tape work well, on ductwork you can reach. But in most commercial buildings, the ducts sit above sealed ceilings and behind walls, where these traditional duct sealing methods can’t reach. Aeroseal is the one duct sealing method built to seal those hidden runs from the inside.
|
FEATURE |
Aeroseal |
Mastic |
Tape |
Coatings |
|---|---|---|---|---|
|
Seals concealed ductwork |
✔ |
✕ |
✕ |
✕ |
|
Minimum ceiling removal or dismantling |
✔ |
✕ |
✕ |
✕ |
|
Leak rate measured before & after |
✔ |
✕ |
✕ |
✕ |
|
Works in an occupied building |
✔ |
Limited |
Limited |
✕ |
|
Good for exposed, reachable joints |
✔ |
✕ |
✕ |
✕ |
|
Low upfront material cost |
Higher |
✕ |
✕ |
✕ |
Reaches what nobody can reach
Sealant travels through the pressurised duct and collects at the leaks, including the ones behind walls that no hand or brush will ever touch. This isn't a matter of effort. Manual sealing physically cannot do it.
Building stays intact and stays open
No ceilings opened, no ductwork removed, no reinstatement afterwards. For a hospital ward, a trading floor, or a running kitchen, that difference is usually bigger than the sealing cost itself.
A number, not a promise
Leakage is measured before and after, and you receive a certified report. Manual sealing gives you a technician's word that the joints look sealed. Aeroseal gives you the figure.
Comparing methods in more detail? See our neutral breakdown of duct sealing methods.
Key Benefits of Aeroseal Duct Sealing
What you actually get, measured rather than promised.
Up to 95% of leakage sealed
Measured before and after, so the result is certified, not estimated.
20–30% of conditioned air is lost to leaks
In a typical duct system. Sealing it is where the savings come from.
Minimum dismantling & downtime
Sealed from inside the duct, usually no ceilings are opened and no ductwork is removed. Most jobs are completed within a day.
Reaches what hands can't
Seals leaks in ducts nobody can physically get to, behind walls and above sealed ceilings.
Aeroseal Duct Sealing Process
1. Preparation
We protect your equipment and seal off the registers. Your system stays in place, nothing is dismantled.
2. Leak Detection
Before we seal anything, we measure exactly how much air your system is losing. You get a number, not an estimate.
3. Internal Sealing
Sealant is injected into the pressurised duct and collects at the leaks, sealing them from the inside. No ceilings opened, no ductwork removed.
4. Certified Results
We measure again and hand you a report comparing leakage before and after. You see exactly what you paid for.
Proven results: 98% leakage reduction
Aeroseal Duct Sealing at a Shopping Mall in Hong Kong’s Eastern District
This shopping mall in Hong Kong’s Eastern District employed Aeroseal duct sealing technology to assess and seal duct leakages. The leakage was reduced from 1,056.2L/s to 16.2L/s.
Aeroseal Duct Sealing Result
The 98% reduction in duct leakage helped reduce system fan power and energy consumption, contributing to a lower carbon footprint.
- Project Details
- Type: Shops, Shopping Centres, Supermarkets, Arcades
- Design Style: Contemporary
- Location: Hong Kong Eastern District
- Leakage Before Sealing: 1,056.2L/s
- Leakage After Sealing: 16.2L/s
- Leakage Reduction: 98%
Our Projects
- Hong Kong
- Shopping Mall
- Hong Kong
- Hospital
- Hong Kong
- Research facility
- Hong Kong
- Commercial facility
- Hong Kong
- Shopping Mall
- Hong Kong
- Research facility
Bill Gates Endorses Aeroseal
Supporting the Singapore Green Plan 2030
HVAC is typically the single largest energy load in a commercial building, and duct leakage is one of the largest sources of waste within it.
Sealing the ductwork cuts that waste directly, which is why duct sealing sits alongside chiller upgrades and lighting retrofits in most building efficiency plans.
Who We Serve
Healthcare clinics and labs
Pressure-controlled environments where opening ceilings isn't an option. Aeroseal seals without disrupting operations or compromising a controlled space.
Commercial offices and retail
Long duct runs above finished ceilings mean leaks nobody can reach by hand. Aeroseal reaches them without touching the fit-out.
F&B kitchens and processing
Heavy exhaust loads and grease stress ductwork constantly. Aeroseal restores the seal without shutting the kitchen down.
Warehouses and light industrial
Large, high-level duct runs that are impractical to hand-seal. Aeroseal handles the scale from inside the system.
Campuses and public institutions
Older, extended ductwork across large sites, often with efficiency or Green Mark targets to meet. Aeroseal delivers a measured, documented result.
Condominiums and landed homes
Ageing duct systems losing efficiency after years of constant cooling. Aeroseal seals them without opening ceilings or disrupting the household.
Why Choose Delta Sirius
Certified Aeroseal partner
Aeroseal isn't something any contractor can offer. We're trained, equipped, and certified to deliver it, so the technology and the people applying it are the real thing.
30+ years in HVAC
Three decades working on ductwork and ventilation across commercial and industrial buildings. This isn't a sideline for us.
Skilled, certified technicians
The people on site are trained on both HVAC systems and the Aeroseal process, not a general crew learning on your building.
Efficient turnaround
Most jobs are completed within a day. We work around your operations, not the other way around.
Green, Sustainable Practices
All our sealing materials are safe, non-toxic, and in line with Singapore’s green building standards.
Honest, Transparent Pricing
No upsells. No hidden fees. Just clear, fair service quotes based on your actual needs.
Book Your Service Today
Frequently Asked Questions
How much does Aeroseal duct sealing cost in Singapore?
Pricing depends on four things: the size of the duct system, how many leaks it has, how accessible it is, and what leakage target you need to hit. A single floor of a commercial building is a different job from a full-building system across multiple risers.
Because of that, we don’t publish a flat rate, we’d rather quote accurately than mislead. What we can tell you is how the number is built: we start with a leakage test, which tells us exactly how much air your system is losing. That measurement determines the scope, and the scope determines the price. You’ll see the figures before you commit to anything.
Send us your building details and we’ll come back with a scope and a price.
How long does it take, and do we need to shut the building down?
Most jobs are completed within a day. The system is prepared, sealed, and tested in one visit, and your building keeps operating around it. There’s no dismantling and no ceiling removal, so there’s nothing to reinstate afterwards and no follow-up disruption. For hospitals, kitchens, and offices that can’t close, this is usually the deciding factor
Do you need to open ceilings or remove ductwork?
No. Aeroseal works from inside the pressurised duct, so the ductwork never has to be exposed. That’s the core difference from mastic and tape sealing, which require physical access to every joint. Nothing in your building is opened up.
How do I know it actually worked?
We measure the leak rate before sealing and again after, and you receive a certified report comparing the two. You’re not taking anyone’s word for it, you get the figures. Manual sealing methods can’t offer this, because there’s no way to quantify what was sealed.
How does Aeroseal compare to mastic or foil tape sealing?
Mastic and tape are effective duct sealing methods for ductwork you can physically reach. The catch is access: in most commercial buildings, the ducts aren’t reachable. If you’re weighing up the different duct sealing methods, we’ve written a neutral comparison of duct sealing methods and when each one fits.
Is the sealant safe for occupied buildings, hospitals, and kitchens?
The sealant is water-based and non-toxic, and it’s been used in healthcare facilities, schools, and food premises. It deposits only where the leaks are, rather than coating the duct interior, so the system stays clean.
How long does the seal last?
The sealant is tested for durability over a period of years, and once cured it holds under normal system pressure and temperature. In practice, the ductwork itself usually needs attention before the seal does.
Do you seal both supply and return ducts?
Yes. Both are sealed, and both are measured. Return-side leakage is often the bigger problem in older systems, since it pulls unconditioned air and contaminants in from ceiling voids.
What is aerosol duct sealing?
Aerosol duct sealing is the general term for sealing ductwork from the inside using an aerosolised sealant, rather than applying sealant by hand from the outside. Aeroseal is the aerosol duct sealing system Delta Sirius uses.