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Four small white tubes of soldering flux paste in a row

KL-558 No Clean Soldering Flux Paste 5ML 4 Pack

SKU CH-66TE-C8S8V MPN KL-558

Lead-free, halogen-free flux paste in four 5 ml syringes for no-clean electronics soldering

  • Certifications and standardsLead Free Compliant
  • Lead-free and halogen-free formula protects components
  • High-activity rosin removes oxidation for reliable joints
  • No-clean residue saves post-soldering cleaning time
  • Push-type syringe dispenses precise amount without waste
  • Suitable for PCB, SMD and hand-soldering tasks

Lead-free no-clean flux paste

The KL-558 is a rosin-based soldering flux paste supplied in four 5 ml syringes. It is formulated to be lead-free, halogen-free and non-corrosive for electronics work. The high-activity rosin removes oxidation from pads and leads quickly. A pushing-type plunger controls flow and reduces waste during application.

Users needing quick clean-up

The no-clean formulation leaves minimal residue that does not require washing, suiting PCB, SMD and SMT rework on phones, appliances and meters. Buyers who need a water-soluble flux for mandatory post-solder cleaning should choose a different chemistry. Anyone requiring a larger single container for high-volume production will find the 5 ml size limiting.

5 ml pushing-type syringe

Each unit delivers 5 ml of paste through a syringe barrel that advances the material with a thumb press. This mechanism gives smooth, metered dispensing directly onto joints without a separate flux pen or bottle. The fixed 5 ml volume per syringe determines how many joints can be serviced before a replacement is needed.

How it compares

Measured against everything we stock in Soldering Irons & Stations, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 64% of the 802 comparable items (median $25.99).

Specifications

Environment & compliance
Certifications and standardsLead Free Compliant

Questions about this item

How do I apply KL-558 flux paste without wasting it?

The pushing-type design lets you dispense a small bead directly onto the joint; advance the plunger slowly and stop when flux appears, then solder immediately so excess is consumed rather than left on the board.

Will the 5 ml syringes dry out before I finish all four?

Keep each syringe capped and store upright in a cool place; the no-clean, halogen-free rosin formulation remains stable for months, but discard any portion that thickens or darkens noticeably.

At what point does the flux stop cleaning oxides during a long soldering session?

High-activity rosin removes oxide layers quickly, but once the paste carbonises from prolonged heat it loses effectiveness — clean the tip and apply fresh flux when wetting action slows.

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