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RF4 HX-50 Solder Flux Paste 50g for PCB Repair
₨1
Solder Flux Paste for Board-Level Soldering
RF4 HX-50 is a 50g flux paste for board-level soldering jobs where clean joints matter. Use it on component pads and pins before you heat them, so the solder wets the surface instead of balling up. It suits PCB repair, component replacement and rework on the bench. Keep the jar closed when you’re not using it, and only take out what you need with a clean tool.
| Weight | 0.1 kg |
|---|
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Description
RF4 HX-50 Solder Flux Paste for PCB Repair
Solder flux paste sits at the center of most board-level repair work. On a dirty or oxidised pad, solder will not flow properly, and the joint looks fine but fails later. The RF4 HX-50 gives your repair bench a 50g paste that you apply before heating, so the pad and the component lead are ready to take solder.
Where Flux Fits in Your Repair Workflow
Flux is part of prep, not a step you add after soldering. You clean the pad, apply a thin layer of paste, place the part or set the tip, then heat. When the flux is applied before heating, it helps the solder flow where you want it. Skipping this step is a common reason for bridges and cold joints during component replacement.
Applying the Paste
Apply a small amount with a brush, a cotton swab or a flux pen-style tool. A thin, even layer is enough. Too much paste leaves more residue to clean and can spread under small components. Work on one pad group at a time and keep the flux off areas that don’t need it.
Cleaning After the Repair
Flux residue can affect the board over time, so clean it after soldering. Use isopropyl alcohol and a soft brush, then let the board dry before you power it. Check the joints under magnification for leftover residue around fine-pitch parts.
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Q & A
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Key Features
- 50g paste format for repeated bench use
- Applied before heating to support solder flow
- Suitable for general board-level soldering
- Brush, swab or syringe-style application
Specifications
| Brand | RF4 |
|---|---|
| Model | HX-50 |
| Category | Solder Flux Paste |
| Volume | 50g |
Common Repair Uses
- Pad prep before replacing a small SMD component
- Reflowing a lifted or cold solder joint
- Tinning pads before attaching a wire or connector
- Applying flux during BGA rework preparation
- Cleaning oxidised pads before soldering
Compatible Devices
- Universal, not device-specific: general PCB soldering on repair boards
- Component replacement on mobile phone and electronics boards
- Pad preparation before soldering SMD components
- Board-level rework on fine-pitch parts
FAQ
What is the product name?
The product name is RF4 HX-50 Solder Flux (50g).
What is the brand of this product?
The brand of this product is RF4.
What is the model of this product?
The model of this product is HX-50.
What is this product used for?
This product is used as a solder flux paste for board-level soldering and PCB repair.
Which devices are compatible with this product?
This product is universal and not device-specific. It is used for general PCB soldering.
Who should use this product?
This product is suitable for mobile repair technicians, repair shops, service centers, and professional users.
Can I use this flux for BGA rework?
Flux paste is applied during BGA rework to support solder flow. Confirm the application method and residue details on the product datasheet before using it on a specific rework process.
Do I need to clean the flux after soldering?
Yes. Clean flux residue with isopropyl alcohol and let the board dry fully before powering it. Check the datasheet for any specific cleaning guidance for this product.
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