Uniweld
Uni-4300 Solder Kit with Syringe
A compact aluminium soft solder and flux kit for controlled field and workshop repairs on aluminium, copper and brass service components.
Technical snapshot
Low-temperature aluminium soldering in a compact kit.
P4KD9S combines Uni-4300 aluminium solder, flux and a metal-tip applicator to help technicians place flux accurately in tight repair areas.Aluminium and dissimilar-metal repair
Repair small components, tubing and coils without carrying a full alloy kit.
Uni-4300 is made for technicians facing aluminium repair work on service calls or at the bench. It can be used for aluminium-to-aluminium repair as well as aluminium-to-copper and aluminium-to-brass joining where the repair method is suitable for the component.
- Compact Uni-4300 solder kit for HVAC/R, refrigeration and maintenance use.
- Useful for aluminium radiators, sheet metal, aluminium tubing and selected coil repairs.
- Can support aluminium-to-copper and aluminium-to-brass joining tasks.
- Syringe-style applicator helps place flux accurately in small repair zones.
- Low listed melting point helps reduce the heat required compared with higher-temperature repair methods.
Best suited for
Keep this kit in the service vehicle or workshop for controlled aluminium repair tasks where the repair area is small and accessible.
- Aluminium coil, tube and light component repairs.
- Aluminium-to-copper tube transitions in HVAC/R service work.
- Detailed bench repairs where precise flux placement matters.
Kit contents
Everything centres on controlled flux placement and steady solder flow.
The kit format gives technicians the solder, flux and applicator needed for practical aluminium soft solder repairs in one compact pack.
Aluminium soft solder coil for joining and repair work on compatible metals.
Flux helps prepare the heated metal surface and supports solder wetting during repair.
Useful for reaching small joints, preheated tubing and tight service repair areas.
Compact enough for service vehicles, maintenance teams and workshop benches.
Material guide
Made for aluminium repair and selected dissimilar-metal joints.
Use for small aluminium repair areas, sheet metal work and compatible aluminium service components.
Useful for selected aluminium-to-copper tube repair tasks in refrigeration and air conditioning work.
Supports selected aluminium-to-brass repair work where the component and procedure are suitable.
Repair workflow
Clean, flux, heat and flow.
Remove oil, oxide, coating, paint and contamination from the repair area before heating.
Use the applicator to place flux where the solder needs to flow.
Bring the work area up to temperature with controlled heat, avoiding nearby components.
Feed solder into the heated joint, then allow the repair to cool before checking the result.
Heat-control notes
Small aluminium repairs are all about controlled temperature.
Heat the work area evenly and keep the torch or heat source moving. Overheating aluminium, insulation, coil fins, nearby plastics or painted surfaces can damage the component before the solder has a chance to do its job.
Storage and handling
Keep the kit clean, sealed and ready.
Store the solder, flux and applicator in a clean dry area. Keep flux containers closed when not in use and check the applicator tip before starting a repair.
Hot-work reminders
- Read the SDS and follow site hot-work procedures before heating metals.
- Use suitable eye, hand and respiratory protection for soldering, fluxing or heating work.
- Keep flux, heat and flame away from combustible materials and sensitive equipment.
- Do not use on safety-critical repairs unless the repair method is approved for that application.
Related Uniweld products
Linked brazing, alloy and tubing products from Omni Tools.
Internal Omni Tools links for Uniweld products commonly used around aluminium repair, heating, tube preparation and service work.Useful information & documents
P4KD9S resources.
Product links and manufacturer information for the Uniweld Uni-4300 Solder Kit with Syringe.Omni Tools links
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