Leak Lock Thread Sealant – Blue and Gold
Highside Chemicals’ sealant for threaded and flanged joints on refrigerant, oil and gas circuits.
AirGreen codeAG-CH-00101
514 316-2973 · sales@airgreen.ca
Quick facts
Leak Lock is the thread sealant from Highside Chemicals. It seals the threads and flanges of air conditioning and refrigeration circuits exposed to refrigerants, oils, gases, air and water, and also works as a gasket compound. Once set, it stays flexible, adheres to surfaces and fills voids.
A sealant that holds from full vacuum to 10,000 psi
Highside Chemicals rates it for a range from full vacuum to 10,000 psi, from -93 °C to 204 °C. It applies to metals (aluminum, copper, steel, stainless steel, galvanized) and to plastics such as PVC, CPVC and ABS. It also helps keep nuts and fittings from loosening under vibration.
Blue or Gold
- Leak Lock Blue: the original formula, in a 1.3 oz tube or a 4 oz bottle with brush.
- Leak Lock Gold: contains Teflon® and reduces galling on stainless steel threads, in a 1.3 oz tube.
Directions for use
Clean the threads with acetone, apply the sealant with a brush or spatula and let it set for about 20 minutes before assembling. Time before putting the system into service ranges from 1 to 2 hours for small diameters to the next day for 2 to 4 in pipe, depending on temperature. The manufacturer does not recommend it with alcohols. The safety data sheet is in the Documents section of this page.
Available at AirGreen, in Greater Montréal
Leak Lock is offered by AirGreen for your heat pump and air conditioning work in Montréal, Laval, Longueuil, on the South Shore and on the North Shore. To check availability or get a quote, call us at 514 316-2973 or email sales@airgreen.ca with the version, the format and the quantity.
A sealant that holds under vacuum and under pressure
Leak Lock seals threads and flanges where ordinary tape or dope lets go.
- Threaded and flanged joints on air conditioning and refrigeration circuits
- Fittings exposed to refrigerants, oils, gases, air and water
- Joining dissimilar metals and plastics (PVC, CPVC, ABS)
- Fittings under vibration, to keep them from loosening
3 sizes, one page
Each size has its own AirGreen code. Tap a row to select it.
| Format | Version | Container | Maker’s part no. | AirGreen code |
|---|---|---|---|---|
| Blue – 1.3 oz tube | Blue | 1.3 oz tube | 10001 | AG-CH-00101 |
| Blue – 4 oz bottle with brush | Blue | 4 oz bottle with brush top | 10004 | AG-CH-00102 |
| Gold – 1.3 oz tube | Gold (with Teflon®) | 1.3 oz tube | 11001 | AG-CH-00103 |
Blue: the original formula. Gold: with Teflon®, for stainless steel.
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- Clean the threads with acetone; surfaces must be clean and dry.
- Apply with a brush or spatula and let it tack about 20 minutes before assembly.
- Return to service: 1 to 2 hours on small pipe, up to overnight on 2 to 4 in pipe, depending on temperature.
- The manufacturer does not recommend it with alcohols.
- Read the safety data sheet before use.
Manufacturer documents
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Frequently asked questions
What is the difference between Leak Lock Blue and Leak Lock Gold?
Both seal the same fluids over the same pressure and temperature range. Gold contains Teflon® and reduces galling on stainless steel threads.
Can I use it on a flare fitting?
Highside presents it as a sealant for threaded and flanged joints and as a gasket compound. For a flare fitting, follow the equipment maker’s instructions: many call for a clean flare and refrigeration oil rather than a sealant.
How long before pressurizing?
Let it tack about 20 minutes before assembly. Full set takes 1 to 2 hours on small pipe and up to overnight on 2 to 4 in pipe, depending on temperature.
Where is the safety data sheet?
In the Documents section of this page, in French and English, straight from Highside Chemicals.
Leak Lock for your refrigerant fittings
Tell us the size and the quantity: we confirm availability and send you a quote. Or let our technicians install it for you.
Specifications from the manufacturer’s documentation, checked on October 7, 2026.