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White 50 g rosin flux paste tub with metal spatula

JacobsParts Inc.

JacobsParts Inc. FLX50-KIT Soldering Flux Paste 50 g

SKU CH-GR6T-32NRE MPN FLX50-KIT

Rosin soldering flux paste with spatula cleans oxidation and improves solder flow for reliable joints

  • Product typeSoldering Flux Paste with Spatula
  • Cleans and prevents oxidation for reliable joints
  • Neutral pH 7 ±0.3 protects sensitive components
  • Increases solder flow for efficient work
  • 50 g paste with spatula for precise application
  • Rosin formula creates strong electrical and mechanical bonds

Product Identity

JacobsParts FLX50-KIT is a 50 g rosin soldering flux paste supplied with a metal spatula. It is formulated for electronics work where clean joints and reliable electrical bonds are required. The neutral pH of 7 ±.3 makes it suitable for sensitive components. Hobbyists, repair technicians and students handling through-hole or surface-mount tasks will find the kit practical.

Thermal Behaviour

The paste activates at normal soldering iron temperatures, cleaning oxidation and improving wetting without producing excessive fumes. It draws no power itself and adds no audible noise to the workbench. Residue remains non-corrosive after cooling, so boards can be left unwashed when the application allows. The spatula helps apply only the amount needed, limiting waste and smoke.

Build And Use

The flux comes in a sealed 50 g container that resists drying out between jobs. A metal spatula is included for scooping paste and for scraping residue from pads or tracks after soldering. The neutral formulation reduces the risk of long-term corrosion on copper traces. Users who need water-soluble flux or a larger volume for production runs should look elsewhere.

How it compares

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

Price $5.99
Cheaper than about 95% of the 802 comparable items (median $25.99).

Specifications

Product
Brand nameDelcast
Model nameFLX50-KIT
Product typeSoldering Flux Paste with Spatula

Questions about this item

How do I apply the flux paste with the included spatula and what is the common mistake to avoid?

Scoop a small amount with the metal spatula and spread it evenly on the joint area before heating; the frequent error is applying too much paste, which leaves excess residue that must be cleaned afterward.

Will the flux paste dry out or need replacement over time?

The rosin-based paste remains stable in the sealed 50 g container; keep the lid tight after each use to prevent the flux from hardening and losing its wetting properties.

What limitation appears first during prolonged soldering sessions with this flux?

With a neutral pH of 7 ±0.3 the flux is non-corrosive, so the first practical limit is the accumulation of rosin residue on the tip and workpiece, which requires periodic cleaning to maintain solder flow.

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