Solder Connection

Solutions in Soldering Technology

Delta 399-42 No Clean Flux

Qualitek Delta 399-42 is a homogeneous mixture of halogen-free, low solids organic flux designed for high-temperature lead free wave-soldering, selective soldering, surface mount assembly and through-hole applications. 399-42 exhibits excellent wetting and through-hole fill. 399-42 was formulated specifically for lead-free soldering processes.

399-42 flux is ideal for conventional PTH components and SMT PCB assemblies, producing bright solder joints and with no need to post clean. 

Key Product Features and Benefits:

  • Halogen free
  • Excellent Hole fill
  • Specifically designed for Lead-Free solder systems
  • Flux Classification - ORL0


Data Sheets and Info

Health & Safety

Technical Bulletin