CYNEL UNIPRESS CYNEL-1 40g Soldering Flux Paste for Soft Soldering

Reliable solder joints start with clean, oxide-free surfaces. CYNEL-1 flux paste removes oxides and promotes wetting during soft soldering, ensuring strong, conductive connections on copper, brass, and tin-plated components. Its rosin-activated formula works with both leaded and lead-free solders, making it a versatile choice for electronics repair, prototyping, and metalwork.

Who is it for

This flux is ideal for electronics technicians, hobbyists, and metalworkers who need a dependable flux for hand soldering. It suits anyone working on circuit boards, wires, terminals, or small metal parts where a reliable, active flux improves solder flow and joint integrity.

Main features

• Active rosin-based flux for soft soldering
• Removes oxides and prevents re-oxidation during heating
• Compatible with tin-lead and lead-free solder alloys
• Paste form in a 40 g jar for easy application
• Optimal working temperature 200–350°C
• Corrosive residue requires cleaning after soldering

Specifications

• Product type: Soldering flux paste
• Application: Soft soldering
• Flux type: Rosin activated (RA)
• Flux activity: Active
• Residue type: Corrosive
• Cleaning requirement: Yes, post-soldering
• Recommended solder alloys: Tin-lead (Sn-Pb) and lead-free
• Packaging: Jar
• Form: Paste
• Chemical basis: Rosin-based
• Optimal soldering temperature: 200–350°C
• Storage conditions: Cool, dry place
• Shelf life: 12–24 months (unopened)
• Weight: 40 g

Tips

Apply a small amount of flux to the joint before soldering. After soldering, clean the residue with isopropyl alcohol or a dedicated flux remover to prevent corrosion. Store the jar tightly closed in a cool, dry place to extend shelf life.