Solder & flux
Soldering SuppliesRosin-core solder and a bit of flux — the consumables every joint needs.
- Approx. cost
- $6–$25
- Weight
- 2–6 oz
- Used in
- 3 kits
Purpose
Supply the filler and wetting agent that make a clean electrical joint.
Used in kits
- Small Electronics Repair Kit
Electronics & Radio
- Ham Radio Field Day Kit
Electronics & Radio
- RC Car Race Day Kit
Hobby & Making
Alternatives
- Solder paste— For surface-mount work; needs different technique.
Maintenance notes
- Keep flux capped; it dries and gets gummy.
Buying considerations
- A thin diameter (0.5–0.8 mm) suits small electronics.
- A flux pen is cleaner in a field kit than a tub of paste.
Safety notes
- Solder fumes are irritating — ventilate, and wash hands before eating, especially with leaded solder.
Page history & editing
Editor-reviewed2026-07-01 Last edited 2026-07-01 by human editor