Buy Sealants Online in Australia
This is our full sealant range in one place: thread sealants and PTFE tape, RTV silicone and flange sealants, MS hybrid and silicone sealants, pipe repair kits, a leak-stop spray, expanding foam and a joint sealant for concrete. Most of it comes from Loctite, with products from CRC, GSA, Epirez, Hansa, OSI, Ultraloc, Sanvo, Henkel and Unasco. If you already know the job, go straight to Thread Sealants, Gasket Sealants or Pipe Maintenance & Repair. Our Thread Locking and Sealing Guide is a good starting point.
Sealant Quick Reference
| Job | Product type | Examples from our range |
|---|---|---|
| Sealing pipe threads | Anaerobic thread sealants, sealing cord, PTFE tape | Loctite 542, 565 PST, 567 PST, 569 Hydraulic, 577, Loctite 55 Pipe Sealing Cord, Hansa, Unasco and GSA thread tape |
| Plastic pipe threads | Plastic pipe sealant | Loctite 5331 Plastic Pipe Sealant |
| Sealing flanges and covers | Anaerobic flange sealants and RTV silicone gasket makers | Loctite 510, 515, 518, 5127, SI 5900, 596, 598, SI 587, SI 5699, 5920 Copper Maxx, CRC RTV Select-A-Bead, CRC Red RTV, Sanvo, Ultraloc |
| General silicone sealing | Silicone sealants | OSI Construction RTV Silicone (clear), OSI Multi-Purpose Clear Silicone |
| Bonding and sealing in one | MS hybrid adhesive sealant | CRC ADOS MS High Performance Adhesive Sealant |
| Stopping a leak | Leak-stop spray, pipe repair kits | CRC 8498 Leak Stop Spray Seal, Loctite 96321 and Loctite 5070 Pro Pipe Repair Kits |
| Gaps and penetrations | Expanding foam, fire-rated products | GSA Expanding Foam, GSA Expanding Foam Fire Rated, GSA Fire Seal, GSA EFG Foam Gun, Henkel Sista Polyurethane Foam |
| Concrete joints | Control joint sealant | Epirez Control Joint Sealant (D5-070) 4L |
| Wrapping and insulating | Self-sealing wrap | Loctite Insulating & Sealing Wrap |
Cure times, temperature limits, fluid compatibility and approvals vary by product. Always check the data sheet for the one you are using.
Choosing a Sealant
Start with the joint
Threaded joints need a thread sealant or tape. Flat flanges and covers need a gasket sealant. Gaps in buildings and structures need a silicone, MS or foam product. Work out which of these you have first, then narrow down by the material, the fluid and the temperature.
Thread sealant or PTFE tape?
PTFE tape is quick, has no cure time and is easy to use on general pipe threads. Anaerobic thread sealants such as Loctite 577 or 567 fill the thread more completely and don't loosen under vibration. For gas, only use a product whose data sheet and approvals say it is suitable, and have the work done by a licensed gas fitter. See the Loctite Thread Sealant Guide.
Anaerobic or silicone for flanges?
Anaerobic flange sealants such as Loctite 510 and 518 suit close-fitting, rigid metal faces. RTV silicones suit flexible flanges and larger gaps. Our RTV Silicone Gasket Maker Guide explains the difference.
Prepare the surface
Most sealant failures start with a dirty or damp surface. Clean, degrease and dry the joint, remove old material, and follow the cure time before pressurising. See Adhesive Removers for cleaning up old sealant.
Not sure which one you need? Contact our team, call (02) 9773 0122 or request a quote.
Related Ranges
- Thread Sealants and Threadlockers
- Gasket Sealants
- Pipe Maintenance & Repair
- Epoxy & Structural Adhesives and Adhesives
People Also Ask — Sealants
What is the difference between a thread sealant and PTFE tape?
PTFE tape is a thin film wrapped around the thread. It is simple, has no cure time and suits general pipe threads. Anaerobic thread sealants fill the thread gaps completely, cure when confined between metal surfaces, and resist vibration. See Thread Sealants.
What is an anaerobic sealant?
It is a liquid that stays uncured in air and cures when confined between close-fitting metal parts. Loctite 510 and 518 are flange sealants of this type, and Loctite 542, 567 and 577 are thread sealants. The joint needs to be clean for a good cure.
Can I use any sealant on gas fittings?
No. Use only a product whose data sheet and approvals state it is suitable for gas, and have gas fitting work carried out by a licensed gas fitter.
Should I use a cut gasket or a liquid sealant on a flange?
It depends on the flange and the service. Liquid sealants suit close-fitting machined faces such as engine and gearbox covers. Pipe flanges in most services use a cut gasket. Follow the equipment maker's recommendation. See Gasket Sealants.
How long does silicone sealant take to cure?
It forms a skin first and cures through over time, and this depends on bead size, temperature and humidity. Check the data sheet and don't load or pressurise the joint until it is fully cured.
Which brands of sealant does AIMS stock?
Loctite, CRC, GSA, Epirez, Hansa, OSI, Ultraloc, Sanvo, Henkel and Unasco.