---
product_id: 9423641
title: "Kester 24-6337-8800 50 Activated Rosin Cored Wire Solder Roll, 245 No-Clean, 63/37 Alloy, 0.031\" Diameter"
brand: "kester"
price: "€ 109.43"
currency: EUR
in_stock: true
reviews_count: 8
category: "Kester"
url: https://www.desertcart.hr/products/9423641-kester-24-6337-8800-50-activated-rosin-cored-wire-solder
store_origin: HR
region: Croatia
---

# 0.031" Diameter Wire No-Clean Activated Rosin Flux 63/37 Alloy Precision Kester 24-6337-8800 50 Activated Rosin Cored Wire Solder Roll, 245 No-Clean, 63/37 Alloy, 0.031" Diameter

**Brand:** kester
**Price:** € 109.43
**Availability:** ✅ In Stock

## Summary

> 🔥 Solder smarter, not harder — clean joints, zero hassle!

## Quick Answers

- **What is this?** Kester 24-6337-8800 50 Activated Rosin Cored Wire Solder Roll, 245 No-Clean, 63/37 Alloy, 0.031" Diameter by kester
- **How much does it cost?** € 109.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/9423641-kester-24-6337-8800-50-activated-rosin-cored-wire-solder)

## Best For

- kester enthusiasts

## Why This Product

- Trusted kester brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Made in the USA:** Crafted domestically for guaranteed quality and supply chain reliability.
- • **Ideal Wire Gauge:** 0.031" diameter wire balances control and flow for professional-grade solder joints.
- • **Trusted Industry Standard:** Kester’s activated rosin flux meets J-STD-004B for consistent, high-quality results.
- • **Effortless Clean Soldering:** No-clean flux means zero residue cleanup—save time and avoid corrosion risks.
- • **Precision Alloy Composition:** 63/37 Sn-Pb alloy ensures optimal melting point and reliable electrical connections.

## Overview

The Kester 24-6337-8800 solder roll features a 63/37 tin-lead alloy with a 0.031" diameter wire core activated by a no-clean rosin flux. Designed for professional electronics assembly, it delivers clean, corrosion-free joints without the need for post-solder cleaning. Manufactured in the USA, this product meets industry standards for reliability and efficiency, making it a top choice for precision soldering tasks.

## Description

24-6337-8800245 No-Clean Flux Solder will create visually acceptable assemblies without the need and expense of cleaning. Solderability and efficiency are comparable to that of mildly activated rosin flux (RMA). Residues are non-corrosive, non-conductive and do not require removal in most applications.

Review: Bare Minimum High-Quality Rosin Flux - Kester 245 is a very clean high-quality solder, with a minimum size core (1.1%) of halide free low activity flux (ROL0, per J-STD-004B). I use it when I'm using supplemental liquid or gel flux, (which I don't want to mix with my standard go-to Kester 44's flux). Kester 245 leaves the least amount of non-acidic residue. It is truly a no clean solder.
Review: Great material - Worth the price point, makes soldering so much faster

## Features

- Package Dimensions: 6.223 cms (L) x 6.731 cms (W) x 6.223 cms (H)
- Product Type: Electronic Component
- Package Quantity: 1
- Country Of Origin: United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00068IJOU |
| Best Sellers Rank | #30,942 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #85 in Solder |
| Date First Available | September 27, 2013 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1 pounds |
| Item model number | 24-6337-8800 |
| Manufacturer | Kester |
| National Stock Number | 3439-01-509-4430 |
| Product Dimensions | 2.5 x 2.5 x 2.25 inches |

## Images

![Kester 24-6337-8800 50 Activated Rosin Cored Wire Solder Roll, 245 No-Clean, 63/37 Alloy, 0.031" Diameter - Image 1](https://m.media-amazon.com/images/I/71aGruKVs2L.jpg)

## Questions & Answers

**Q: Is this ok for pcbs? normally i don't care about cosmetics, but if i make a board for someone else how can i clean it? ipa?**
A: I use it for cellphone PCB soldering..I have also used it on a prototype board..it has a low melting point 
It gives a good finish..& cleans easily..
You can use Mg chemicals 99.9% alcohol to clean..or ABRO contact cleaner..or WD40 contact cleaner..FLUX is also easily cleaned by warming the board up a little and then use the alcohol with a brush to clean..

**Q: I see different 63/37 kester types of solder.  what is diff. between rosin core (i know what this is), organic core, no-flux core?**
A: Just so you know "Water Soluble" flux is highly corrosive...  You might think it's safe as it's called organic/water soluble, but it will strip you tin within hours if you don't completely clean it.  This solder is an "RMA" solder or "Rosin Mildly Activated" it is a very safe flux that doesn't require post clean, though your surface to be solder must also be very clean as it doesn't have much in the way of cleaning action.

**Q: what is the melting temperature of this solder?**
A: * Melting Range: 361º F, 183º C

**Q: Is this solder multicore ?**
A: Multicore Solder is a different manufacture, this is Kester Solder, all the same

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bare Minimum High-Quality Rosin Flux
*by M***L on June 19, 2025*

Kester 245 is a very clean high-quality solder, with a minimum size core (1.1%) of halide free low activity flux (ROL0, per J-STD-004B). I use it when I'm using supplemental liquid or gel flux, (which I don't want to mix with my standard go-to Kester 44's flux). Kester 245 leaves the least amount of non-acidic residue. It is truly a no clean solder.

### ⭐⭐⭐⭐⭐ Great material
*by M***E on November 25, 2025*

Worth the price point, makes soldering so much faster

### ⭐⭐⭐⭐⭐ It’s Kester! Melts Like Butter Hardens like Steel (well for tin solder. Lol)
*by M***E on October 3, 2019*

What can I say? It’s Kester Solder. The Solder Industry Standard. It flows on like butter, hardens like shiny steel. Simply works. I use it mainly for soldering my Drones & Arduino as well as Rasberry P.I. projects. Kester solder simply performs as long as you’re using the proper percentage and type as recommended for your particular need. I will never again use lead free solder. Using Kester assures top quality possible every single time where any mistakes made are not due to this solder but the solderer be it the wrong temp, iron or technique used, etc.. I find it melts and flows perfectly for me especially on the numerous boards and wires contained in a drone at 390F to 420F but that’s a personal preference coming from someone who’s been soldering RC and drone projects over 15 years always coming back to Kester every time I’ve bought others at a cheaper or even sometimes more expensive price but what can I say? It’s Kester. Just buy it you won’t regret it.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-26*