Kester 245 24-6337-8800 No-Clean Solder Wire 0.031 in
- 63/37 alloy, 0.031 inch diameter
- No-clean flux, activated rosin core
- Non-corrosive, non-conductive residue
- 1 lb roll, part 24-6337-8800
- Solderability comparable to RMA flux
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A one-pound roll of no-clean flux-cored solder for jobs where a wash afterward is unwelcome. The listing gives no melting range or flux percentage.
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ASIN: B00068IJOUModel: 245Category: Solder
Overview
Not a solder that calls for a wash after use, this alloy wire carries a no-clean activated rosin flux in its core. The residues are described as non-corrosive and non-conductive, and in most applications they do not need to be removed.
Skipping the cleaning step saves time and solvent on assemblies, and the flux performs like a mildly activated rosin type. The limitation is missing data: flux percentage, melting range and spool style are not given.
Who it's for
Anyone who solders many joints and want to avoid a cleaning step will find it direct. Anyone working to a process that demands a particular flux class or a lead-free alloy needs different wire.
Pros and cons
- No-clean flux saves a step
- Fine wire for small joints
- Rosin core in the wire
- One pound of solder
- Flux percentage not listed
- Melting range not listed
- Lead status not stated
Performance notes
Flux in the core cleans the joint as the wire melts, and the fine diameter feeds in small amounts. The residue left behind is stated to be non-conductive, which is why cleaning can be skipped in most uses. Solderability is described as comparable to mildly activated rosin.
Specifications
| Brand | Kester |
|---|---|
| Model | 245 |
| Dimensions & fit | |
| Wire diameter | 0.031 inches |
| Item weight | 1 pound |
| Product dimensions | 2.5 x 2.5 x 2.25 inches |
| Construction & materials | |
| Material | 63/37 |
| Other details | |
| Item model number | 24-6337-8800 |
| Flux type | No-clean activated rosin core |
| Product Type | Electronic Component |
Frequently asked questions
What is in the package of Kester 245 solder?
The listing describes a roll of wire solder weighing 1 pound. No tools or accessories are listed.
Do I need to clean flux residue after soldering?
In most applications no. The residue is described as non-corrosive and non-conductive.
What alloy and diameter is it?
The alloy is 63/37 and the diameter is 0.031 inch.
Is it a plumbing solder?
The listing does not describe plumbing use. It is a rosin-cored wire solder with no-clean flux for assemblies.