Description
Product Overview
The KL-533 Liquid Flux by Kellyshun is engineered as a premium no‑clean rosin paste that combines high activity with a gentle, non‑irritating odor. Its formulation is lead‑free, halogen‑free, and designed to deliver excellent wettability, allowing solder to flow smoothly across copper pads, component leads, and wire strands. The flux is packaged in a 10 cc syringe that includes two precision needles for accurate application, a push rod for controlled dispensing, and a pair of 5 ft (1.5 m) desoldering wicks that are pre‑cut for convenience. The product dimensions of 3.7 × 1.2 × 0.7 inches and a lightweight of 1.13 oz make it easy to store in any workstation drawer or tool kit. The combination of liquid flux and high‑absorbency wick provides a complete solution for both soldering new connections and removing unwanted solder during repair or rework.
![[Product front view showing all components]](https://www.kortra.store/wp-content/uploads/2026/07/2d58deed5ba04c51882fd53c52fb01ae.jpg)
Usage
Designed for a wide range of electronic repair scenarios, the KL-533 Flux works equally well on printed circuit boards (PCBs), household appliances, automotive control modules, and hobbyist projects involving copper wire splicing. Apply a small amount of flux to the joint area using the included needle; the fluid quickly penetrates microscopic gaps, dissolving oxide layers and preparing the surface for solder. When desoldering, position the 5 ft wick over the excess solder and heat with a soldering iron; the wick capillary action draws the molten solder away, leaving a clean, residue‑free surface. This dual‑approach reduces the need for multiple tools, speeds up turnaround time, and minimizes the risk of thermal damage to sensitive components. The product is suitable for professional technicians, educational labs, and DIY enthusiasts who demand consistent results without the hassle of extensive cleanup.
Why Choose Us
Kellyshun has built a reputation for delivering reliable soldering accessories that meet rigorous quality standards. The KL-533 Flux undergoes strict batch testing to ensure uniform viscosity, optimal activity, and low residue after soldering. Its no‑clean characteristic means that, after the joint solidifies, there is no need for post‑process cleaning, which saves time and reduces exposure to harsh solvents. The included desoldering wick is engineered with a low‑residue design, allowing it to absorb excess solder efficiently while leaving the underlying copper untouched. In addition, Kellyshun provides responsive after‑sales support, offering technical guidance, replacement parts, and a satisfaction guarantee that underscores confidence in product performance.
Key Features
- High‑activity rosin formula removes oxide layers for flawless solder flow
- No‑clean design leaves minimal residue, eliminating post‑solder cleaning steps
- 5 ft desoldering wick quickly absorbs excess solder, speeding up rework
- Lead‑free and halogen‑free composition meets environmental safety standards
- Comprehensive after‑sales service ensures reliable support and part replacement
FAQ
Is the KL-533 Flux compatible with leaded solder?
Yes, the flux works with both lead‑free and traditional leaded solder alloys, providing consistent wetting performance across different solder types.
Can I use the flux on delicate surface‑mount components?
Absolutely. The low‑viscosity formula spreads evenly without applying excessive pressure, making it safe for fine pitch and surface‑mount devices.
How many uses can I get from the 10 cc syringe?
Typical applications use only a few microliters per joint, so a single 10 cc syringe can service dozens of PCBs or repair projects before refilling.
What is the recommended temperature for the desoldering wick?
Heat the wick to the standard soldering temperature of 350 °C (662 °F). The wick will draw molten solder efficiently without degrading.
Does the product come with a warranty?
Kellyshun offers a one‑year limited warranty covering manufacturing defects, and the customer service team is ready to assist with any performance concerns.







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