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Aluminium foil tape and duct tape are the two most common products tradies reach for to help seal, bond, or repair while on the job. However, these two types of tape are built for entirely different applications. Use them for the wrong one and you may get a seal that busts under pressure or a repair that just won’t hold.
If you're comparing aluminium foil tape in Australia against standard duct tape, it helps to understand what sets them apart in areas such as performance and durability. In this guide we’ll break down the key differences between these tapes to help you understand which works best for HVAC work and which is best for general repairs.
What Is Aluminium Foil Tape?
Aluminium foil tape is a flexible tape with a metal foil backing, coated in a heat-resistant adhesive. It can resist extreme temperatures, moisture and UV light. It is commonly used to seal HVAC ducts, patching pipes and wrapping pipes to prevent leaks.
Because aluminium is a soft metal the tape can easily shape itself around corners, wires and other odd places, providing a solid seal.
Common uses:
- HVAC Systems. This tape can withstand high temperatures, and can seal gaps in metal ductwork to stop leaks. This improves efficiency and hence, helps lower energy bills.
- Insulation. It can hold foil-based insulation boards together, and being moisture-resistant, creates a strong water barrier.
- Automotive and Plumbing. Aluminium tape wraps nicely around pipes and hoses to protect against corrosion and temperature fluctuations.
- DIY & Repairs. A quick method for repairs, sealing punctures and heat shielding.
What Is Duct Tape? 
Duct tape is a mightily strong tape that is highly adhesive and highly durable. It is either cloth-backed or scrim-backed, often coated with polyethylene, used mainly for temporary repairs, patching holes or binding things.
It was originally created during World War II, it was originally called ‘duck tape’ as it was made from heavy-duty cotton canvas known as duck cloth. This technically means people calling it duck tape aren’t wrong. It was used for nearly everything, including field dressings on wounded soldiers.
Today it is a versatile and agile tool around the home and workshop. It can be used for temporary repairs on hoses - garden hoses, vacuum hoses and even fluid hoses in your car. It is versatile for odd jobs around the home as well, such as fixing the bindings on books, helping to unscrew stubborn jars or reinforcing cracked and split plastic, such as buckets or rubbish bins.
Key Differences in Performance
Despite their similarities in looks, which can be confusing to some when choosing which tape to use, aluminium Foil Tape and Duct Tape are different tools with different purposes. Foil tape has some specific uses, duct tape a more general use portfolio.
|
Key Performance Indicator |
Foil Tape |
Duct Tape |
|
Temperature Resistance |
Withstands both high temperatures and freezing conditions. It is rated from -30°C to 120°C. Will not burn or melt. |
The rubber adhesive fails in hot conditions. Gummy residue is common when used on hot pipes or instruments. |
|
Moisture & Weathering |
Repels water, moisture and rust. Good for humid conditions. |
Very waterproof for a short while. Eventually, water and UV will break down the tape. |
|
Adhesiveness & Longevity |
Uses an acrylic adhesive that only gets stronger over time. |
Rubber based adhesive that has an initial strong bond, but dries out and weakens over time. |
|
Strength & Flexibility |
A stiff metal back but it can shape and adhere to pretty much anything. |
Made of cloth and plastic, it has high tensile strength and extreme flexibility. Can be torn by hand. |
Why Foil Tape Lasts Longer
The secret to the longevity of aluminium foil tape lies in its acrylic adhesive.
Duct tape adhesive melts in hot weather or freezes hard and brittle in cold weather. The acrylic glue used with aluminium foil tape is more like plastic- it can tolerate temperature variations without changing state. This means it continues to stick no matter what.
Foil tape acts as a literal metal barrier, so it protects the underlying glue from the sun's harsh UV rays and from moisture. This stops the adhesive from breaking down.
Top 5 Applications for Aluminium Foil Tape
1. HVAC Repairs
Aluminium foil tape is used by the heating and cooling industry for fixing and sealing heating and cooling ducts. It creates an airtight seal which will not be broken so you can seal up joints and gaps easily and for little money.
2. Automotive and Engine Repairs
Due to being able to withstand high temperatures, foil tape works well in the engine of motor vehicles. You can bundle and secure wiring and seal up hoses. It can reflect radiant heat away from important electrical components.
3. Fixing Drier Vents
Drying vents and other sections for your clothes drier can be mended with foil tape. Temperatures can rise while the clothes drier is in use, but foil tape handles the heat well.
4. Plumbing and Refrigeration
Foil tape resists water and won’t rust. Plumbers use this tape to seal joints on water heaters and fridges alike, two ends of the temperature spectrum..
5. Electronics and Shielding
Aluminium foil tape blocks electromagnetic and radio frequency jamming. Wrap this tape around guitar pickups or inside your computer box to block buzzing sounds coming through the speakers.
Top 5 Applications for Duct Tape
1. Quick Repairs
You can fix tears in backpacks, tarps and inflatables. They will hold long enough until you can get a more permanent repair. Same with fixing hoses- a good, temporary measure until a more permanent one can be arranged.
2. Emergency Bandages.
Strange but true. While the adhesive is strong, it does come off skin with some heat. You can seal up a wound if you’re on the trail, until a better solution presents itself. Also works if you have blisters from friction.
3. Cable Management
Easily gather up cables and tape them together so you won't get tangled, and tape cables to walls to keep them off the floor. Also perfect to tape down cables that cross walkways, often a mandatory OH&S thing.
4. DIY Gaiters
If you’re walking in terrible weather conditions in winter, such as rain or snow, you can wrap tape around the ends of your pants to your boots, and create a temporary barrier against moisture getting into your boots and making your socks wet.
5. Arts and Crafts
Duct tape comes in a range of colours, so you can get crafty and creative with it. A popular craft item to make is a DIY Duct Tape Wallet.
Which Tape Should You Choose?
The right tape depends on the job, as many a handyperson has said. If you’re working on HVAC or want a solid seal on a pipe that can withstand heat and water, aluminium tape is the go-to tape. The acrylic adhesive and metal backing means foil tape won’t break down over time, it won’t crack in the dryness, or lose its grip.
Duct tape is still useful for those emergency repairs until a more permanent solution can be found. But for anything that needs to last, particularly in HVAC, automotive or plumbing applications, foil tape is built for the job.
MSTOR packs a big range of tapes to help you out of a bind. Contact our team today and tell us the job and we can give you guidance on what tape will work best for you.