RUKO LOS-HM-45.0mm Rosin-Based Soldering Flux Paste 50g

Soldering on copper, brass, or tin-plated surfaces often suffers from poor wetting and weak joints when the oxide layer is not properly removed. This rosin-based flux paste solves that by chemically cleaning the surfaces during heating, allowing solder to flow evenly and bond reliably.

Who is it for

Electronics technicians, electrical engineers, and hobbyists who need a dependable general-purpose flux for manual soldering of through-hole components, wires, and connectors. It is suitable for both leaded and lead-free solder work where a mildly activated rosin flux is appropriate.

Main features

• Rosin-based formula with mildly activated (RMA) flux activity
• Non-corrosive, non-conductive residue after soldering
• Low halide content for reduced risk of post-solder corrosion
• Comes in a 45 mm diameter tin can with 50 g net weight
• Storage temperature range: 5°C to 30°C
• Shelf life: 24 months when unopened

Specifications

• Flux type: Rosin-based (Kolophonium)
• Activity level: Mildly activated (RMA equivalent)
• Standard compliance: DIN EN 29454-1 1.1.2.C (F-SW 21)
• Application: General purpose soldering, electronics, electrical engineering
• Suitable materials: Copper, brass, tin-plated surfaces
• Form: Paste / Grease
• Container type: Tin can
• Container diameter: 45 mm
• Net weight: 50 g
• Residue type: Non-corrosive, non-conductive
• Cleaning requirement: Recommended for critical applications, optional for others
• Halide content: Low
• RoHS compliant: Yes
• REACH compliant: Yes
• Storage temperature: 5°C to 30°C
• Shelf life: 24 months (unopened)

Tips

For best results, apply a thin layer of flux to the joint area before soldering. After soldering, inspect the joint; if the application is critical (e.g., high-frequency or high-impedance circuits), clean the residue with a suitable solvent. Store the tin in a cool, dry place and keep the lid tightly closed when not in use.