Kester 44 63/37 Rosin Solder Wire 1 oz Tube
- 63/37 tin-lead, 0.031 inch diameter
- 1 ounce Dispense-Pak, approx 24 feet of wire
- RMA activated rosin, standard core 66 with 3.3 percent flux
- Iron tip temperature 315 to 371 C (600 to 700 F)
- Industrial use only, for experienced electronics technicians
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small leaded rosin-core solder tube for electronics work, repacked by a reseller. The listing restricts it to industrial use by experienced technicians and carries fume warnings.
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ASIN: B00AVLM4SOModel: 44Category: Solder
Overview
Kester 44 rosin-core wire arrives here in a one-ounce Dispense-Pak tube, specially repacked from a Kester spool. The activated rosin formula is made for flux-cored soldering on electronics.
A small tube is easy to store and handle, and the flux residue is described as non-corrosive and non-conductive. The limitation is messy data: the spec table carries unrelated fields such as a heating element and a power source, and the wire length differs from the description.
Who it's for
Technicians who solder small runs of electronics and want a standard diameter in a compact pack get a ready-to-use tube. Hobbyists without ventilation, and anyone bound to lead-free rules, should look elsewhere.
Pros and cons
- Compact one ounce tube
- Activated rosin formulation
- Non-corrosive flux residue
- Common electronics diameter
- Spec table has unrelated fields
- Wire length differs between sources
- Limited to industrial use
Performance notes
The activated rosin core releases flux ahead of the melting alloy, and the iron tip should run within the stated temperature range. The listing warns that flux fumes may cause pulmonary irritation or damage, so ventilation and eye protection matter.
Specifications
| Brand | Kester |
|---|---|
| Model | 44 |
| Dimensions & fit | |
| Wire diameter | 0.031 inches |
| Item weight | 1 ounce Dispense-Pak |
| Wire length | Approx 24 feet per description; spec table lists 27 feet |
| Construction & materials | |
| Material | 63/37 tin-lead |
| Included components | |
| Included Components | User manual |
| Other details | |
| Flux content | 3.3 percent |
| Recommended uses | 315 to 371 C (600 to 700 F) |
| Use | Industrial use only, experienced electronics technicians |
| Flux type | RMA activated rosin, standard core 66 |
Frequently asked questions
How should Kester 44 solder wire be handled safely?
The listing advises safety glasses, adequate ventilation and avoiding flux fumes, which may cause pulmonary irritation or damage. It gives no storage steps.
How much wire is in the Kester 44 tube?
The description says approx 24 feet in a 1 ounce Dispense-Pak, while the spec table lists 27 feet.
Is this Kester 44 wire lead-free?
No. It is listed as 63/37 tin-lead.
Is the tube sold by Kester itself?
The description says it is repacked by CML Supply, which states it is not affiliated with ITW Kester.