Kester 245 24-6337-8800 No-Clean Solder Single Pack
- 63/37 alloy, 0.031 inch diameter
- 245 no-clean activated rosin core
- Single pack, one roll
- Non-corrosive, non-conductive residue
- Comparable to mildly activated rosin flux (RMA) in solderability
Last refreshed Sep 28, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A single roll of rosin cored solder with a no-clean flux whose residues are described as non-corrosive and non-conductive. Roll weight and melting range are not listed.
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ASIN: B08YXYJWS1Model: 245Category: Solder
Overview
Not a solder that needs washing afterward, this Kester roll is a rosin cored wire with a no-clean flux. Kester says it creates visually acceptable assemblies without the need and expense of cleaning.
The reason to buy it is a no-clean cored wire in a familiar alloy and fine diameter, sold as a single roll for small jobs. The limitation is the near-empty spec sheet: no roll weight, melting range or flux percentage.
Who it's for
Hobbyists and technicians who want one roll of no-clean wire for assembly and repair can start with this single pack. Production users, and anyone who needs the weight or melting range before ordering, should look at listings that publish them.
Pros and cons
- No-clean flux, no washing in most applications
- Residues non-corrosive and non-conductive
- Activated rosin core
- Fine wire diameter
- Roll weight and melting range not listed
- Single roll, no multi-pack
Performance notes
The activated rosin core carries flux into the joint as the wire melts. Kester says solderability and efficiency match mildly activated rosin flux, while the residue is meant to stay on the board without cleaning in most applications. Joint results depend on tip temperature and part cleanliness.
Specifications
| Brand | Kester |
|---|---|
| Model | 245 |
| Dimensions & fit | |
| Wire diameter | 0.031 inches |
| Pack | Single pack |
| Construction & materials | |
| Material | Copper (as listed) |
| Other details | |
| Alloy ratio | 63/37 |
| Flux type | 245 activated rosin core, no-clean |
| Residue | Non-corrosive, non-conductive, removal not required in most applications |
| Solderability | Comparable to mildly activated rosin flux (RMA) |
Frequently asked questions
Do I need to remove Kester 245 flux residue?
Kester says the residues are non-corrosive, non-conductive and do not require removal in most applications.
What does the Kester 24-6337-8800 listing give as specifications?
The specification table lists only the part number and the material as copper. The alloy, diameter and flux details come from the title and description.