---
product_id: 35614165
title: "Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND]"
brand: "kester"
price: "€ 118.83"
currency: EUR
in_stock: true
reviews_count: 6
url: https://www.desertcart.nl/products/35614165-kester-331-lead-solder-wire-1-lb-0-02-in
store_origin: NL
region: Netherlands
---

# Water-soluble flux core for easy cleanup 37% lead Sn63Pb37 alloy for reliable joints 0.020" precision wire diameter Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND]

**Brand:** kester
**Price:** € 118.83
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND] by kester
- **How much does it cost?** € 118.83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/35614165-kester-331-lead-solder-wire-1-lb-0-02-in)

## 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

- • **Clean & Green:** Water-soluble flux core minimizes smoke and odor, keeping your workspace fresh
- • **Heat Stable Hero:** Organic flux formula outperforms rosin on tough metals like copper and brass
- • **Precision Perfect:** 0.020" diameter ideal for intricate electronics soldering
- • **Pro-Level Convenience:** 1 lb spool means less downtime and more uninterrupted flow on your projects
- • **FOMO-Worthy Reliability:** Trusted Sn63Pb37 alloy ensures consistent, strong solder joints every time

## Overview

Kester 331 Lead Solder Wire features a precise 0.020" diameter and a high-performance Sn63Pb37 alloy with 37% lead content. Its water-soluble organic flux core offers superior heat stability, producing minimal smoke and odor while enabling easy post-solder cleanup. Ideal for professional electronics and challenging metals, this 1 lb spool delivers reliable, clean, and efficient soldering for demanding projects.

## Description

Kester 331 is a water soluable formula flux-cored solder wire. More heat stable than most organic fluxes, using this solder wire results in minimal smoke and odor, and can be removed with a water rinse. Kester 331 organic flux is more effective than rosin fluxes when soldering difficult metals such as copper, nickel and brass. High heat stability allows for minimal smoke and odor. NOTE: Extremely active. Residues may need to be removed after soldering.

## Features

- Wire diameter: .020" is common for electronics work
- Alloy: Sn63Pb37 (63% Tin / 37% Lead)
- Core flux type: Water Soluable
- Core size: 66
- Spool size: 1 lb.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Kester |
| Part Number | 24-6337-6401 |
| Item Weight | 1.05 pounds |
| Product Dimensions | 2.5 x 2.5 x 2.25 inches |
| Item model number | 24-6337-6401 |
| Is Discontinued By Manufacturer | No |
| Size | Diameter - 0.020"Inch (0.50mm) |
| Color | Kester "Red" Label (Water-soluble) |
| Style | 331 Flux-Cored Wire, Water-Soluble |
| Material | metal |
| Pattern | Water-Soluble 331 Flux-Cored Wire |
| Item Package Quantity | 1 |
| Performance Description | Organic flux, resulting in minimal smoke and odor |
| Certification | ORH1 per J-STD-004 |
| Special Features | The flux is more heat stable than most organic fluxes, resulting in minimal smoke and odor. |
| Usage | Water-Soluble Liquid Flux is more effective than rosin fluxes in soldering difficult metals |
| Included Components | (1) Kester 24-6337-6401 Spool, 1 Pound per Spool |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND] - Image 1](https://m.media-amazon.com/images/I/71k-04o99mL.jpg)
![Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND] - Image 2](https://m.media-amazon.com/images/I/71XPfiIfAUL.jpg)
![Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND] - Image 3](https://m.media-amazon.com/images/I/71jmfHyfjHL.jpg)
![Kester 331 Lead Solder Wire - 1 lb - 0.02 in Wire Diameter - Sn/Pb Compound - 37 % Lead Content - 24-6337-6401 [PRICE is per POUND] - Image 4](https://m.media-amazon.com/images/I/61HXZiLazDL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great solder, easy to use
  

*by S***R on Reviewed in the United States on November 25, 2014*

This is a really high quality, thin solder which is perfect for electronics work. Saves time and money by allowing you to simply wash the boards off instead of stocking up on flux remover (but let's face it, you need to have a can for occasional use on other solder).The flux comes off very easily with just hot water. I generally soldier my board and leave off anything damage by water - such as relays, and wash the whole board with hot water and perhaps a bit of dish soap. The flux is quite active and will start damaging the board in a couple weeks (or at the least, turn waxy), I highly recommend a prompt board cleaning.T. Carson is right, the flux has a very odd smell when burning, but you get used to it. The smell is a small price to pay for really clean solder joints.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Good stuff, smells funky
  

*by T***N on Reviewed in the United States on June 24, 2013*

This has a very odd smell when it burns. However, it looks really good once soldered and works much better for me than any other solder I used. And thankfully this 1lb spool will last me a lifetime!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great value and it works well
  

*by R***. on Reviewed in the United States on April 6, 2018*

Needed replacement roll for my bench. Great value and it works well.

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-25*