---
product_id: 685715961
title: "Syringe Soldering Paste Flux Sn42 Bi58, Lead-Free Soldering Paste, Soldering Flux Tin Paste, Low Temperature Solder Paste 138 Degrees, for BGA LED SMD SMT Solder (1.41 oz/40 g)"
brand: "gruiqrd"
price: "1033200₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Gruiqrd"
url: https://www.desertcart.vn/products/685715961-syringe-soldering-paste-flux-sn42-bi58-lead-free-soldering-paste
store_origin: VN
region: Vietnam
---

# Syringe push design for zero-waste, smooth flow Melts at 138°C for heat-sensitive components 42% Sn / 58% Bi alloy for low-temp precision Syringe Soldering Paste Flux Sn42 Bi58, Lead-Free Soldering Paste, Soldering Flux Tin Paste, Low Temperature Solder Paste 138 Degrees, for BGA LED SMD SMT Solder (1.41 oz/40 g)

**Brand:** gruiqrd
**Price:** 1033200₫
**Availability:** ✅ In Stock

## Summary

> 💡 Solder Smarter, Not Hotter — Master delicate repairs with cool precision!

## Quick Answers

- **What is this?** Syringe Soldering Paste Flux Sn42 Bi58, Lead-Free Soldering Paste, Soldering Flux Tin Paste, Low Temperature Solder Paste 138 Degrees, for BGA LED SMD SMT Solder (1.41 oz/40 g) by gruiqrd
- **How much does it cost?** 1033200₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/685715961-syringe-soldering-paste-flux-sn42-bi58-lead-free-soldering-paste)

## Best For

- gruiqrd enthusiasts

## Why This Product

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

## Key Features

- • **High-Activity Flux:** Enhanced thixotropic agent boosts solder wettability, reducing missoldering and ensuring reliable, professional-grade joints.
- • **Lead-Free & Eco-Friendly:** Complies with modern standards for lead-free soldering, delivering bright, strong welds without toxic residues.
- • **No-Mess Syringe Delivery:** Innovative piston injection needle ensures smooth, controlled paste flow with zero waste—never overapply again.
- • **Precision Low-Temp Alloy:** Sn42 Bi58 formula melts at a safe 138°C, perfect for delicate electronics and heat-sensitive repairs.
- • **Versatile Application Range:** Ideal for BGA, LED, SMD, SMT repairs and vintage electronics restoration where traditional soldering risks damage.

## Overview

Gruiqrd Syringe Soldering Paste Flux is a lead-free, low-temperature solder paste alloyed with 42% tin and 58% bismuth, melting at just 138°C. Delivered in a precision syringe with a piston injection needle, it offers smooth, waste-free application ideal for sensitive electronic components like BGA, LED, and SMD. Its high-activity flux ensures excellent solderability and bright, strong joints without the risks of high-heat damage, making it the go-to solution for professional-grade repairs on heat-sensitive devices.

## Description

Syringe Soldering Paste Flux

Review: Paste ließ sich hervorragend verarbeiten und liefert tolle Ergebnisse! Die Konsistenz war genau richtig, nicht zu fest und nicht zu flüssig. Ließ sich gut selbst auf kleinste Lötpads (z.B. 24-Pin USB-C-Buchse) auftragen mittels Schablone. Jedoch härtet die Paste anders als mir bekannte Pasten wirklich bombenfest aus im unverlöteten Zustand! Ich habe das Zeug wirklich nur mit enorm viel Aufwand aus der Stencil wieder rausbekommen, Lösungsmittel etc. hat nur wenig gebracht. Am besten direkt nach dem Auftragen das Stencil reinigen...
Review: This is not a replacement for standard solder but a specialist product for particular scenarios where the much higher temperature of regular solder (320 degree tip temperature typically), is higher than the material being soldered will tolerate. This is a brilliant and cost-effective solution for scenarios where you want to repair things like mylar or kapton ribbon cables, where the plastic won't take standard solder temperatures. In testing with some standard copper foil, the paste bonds strongly to the foil using a soldering iron tip temperature of 170 degrees, and this is well below the maximum temperature for these plastics at least for fairly brief periods of time. In scenarios where the base metal won't tin with this solder (I have not tried anything other than clean copper foil at this stage), repair with adhesive copper tape which is then connected electrically using conductive silver paint (which does not have any adhesive bonding strength), will provide a solderable surface. Once I am comfortable with the product, I intend to repair some vintage calculator keyboard assemblies, where a top and bottom layer are bonded, initially through conductive adhesive which has now failed. The plastic used does not melt at the tip temperature used here. Although I have not tried this, it ought to be possible to do reflow soldering using SMD components in a domestic oven set to around 170 degrees. Note that this is quite a brittle solder and so wouldn't be suitable for scenarios where there is significant flexure or vibration, but, again, as I said, it's a specialist product.

## Features

- Gruiqrd Solder paste content: alloy tin 42% Bi58%, flux content: 10.5%. Total weight: 50 g, net weight of the paste: 40 g
- High solderability: A powerful thixotropic agent is added to the solder to make the solder paste highly active. During the soldering process, the solder is significantly moistened, reducing the phenomenon of missoldering
- Lead-free solder paste: no cleaning, strong viscosity, bright welding point. Medium temperature soldering paste with flux, melting point: 138°C (280F)
- PRODUCT ADVANTAGES Push design for more smooth flowing, no waste when welding. Piston injection needle features: reflow soldering does not produce tin beads and tin bridges
- Applications Low temperature tin is widely used in the repair of electronic products. Low temperature tin is mainly used for items that cannot withstand the high temperature of the device. For example, electronic components that do not withstand high temperatures, LED soldering, PCB BGA CPU SMD maintenance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CZN5H8M8 |
| ASIN  | B0CZN5H8M8 |
| Batteries Required? | No |
| Best Sellers Rank | #104,351 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #213 in Solder, Solder Fluxes & Pastes |
| Customer Reviews | 4.5 4.5 out of 5 stars (257) |
| Customer reviews | 4.5 4.5 out of 5 stars (257) |
| Date First Available | 1 June 2024 |
| Date First Available  | 1 June 2024 |
| Included components | Syringe Soldering Paste Flux |
| Item Weight | 50 g |
| Item model number | GR-401 |
| Item model number  | GR-401 |
| Manufacturer | Gruiqrd |
| Manufacturer  | Gruiqrd |
| Package Dimensions | 14.4 x 7.4 x 2.7 cm; 50 g |
| Package Dimensions  | 14.4 x 7.4 x 2.7 cm; 50 g |
| Part number | GR-401 |
| Power source type | DC |

## Images

![Syringe Soldering Paste Flux Sn42 Bi58, Lead-Free Soldering Paste, Soldering Flux Tin Paste, Low Temperature Solder Paste 138 Degrees, for BGA LED SMD SMT Solder (1.41 oz/40 g) - Image 1](https://m.media-amazon.com/images/I/612c7LLRRML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by F***X on 17 May 2025*

Paste ließ sich hervorragend verarbeiten und liefert tolle Ergebnisse! Die Konsistenz war genau richtig, nicht zu fest und nicht zu flüssig. Ließ sich gut selbst auf kleinste Lötpads (z.B. 24-Pin USB-C-Buchse) auftragen mittels Schablone. Jedoch härtet die Paste anders als mir bekannte Pasten wirklich bombenfest aus im unverlöteten Zustand! Ich habe das Zeug wirklich nur mit enorm viel Aufwand aus der Stencil wieder rausbekommen, Lösungsmittel etc. hat nur wenig gebracht. Am besten direkt nach dem Auftragen das Stencil reinigen...

### ⭐⭐⭐⭐⭐ Review
*by A***O on 23 January 2025*

This is not a replacement for standard solder but a specialist product for particular scenarios where the much higher temperature of regular solder (320 degree tip temperature typically), is higher than the material being soldered will tolerate. This is a brilliant and cost-effective solution for scenarios where you want to repair things like mylar or kapton ribbon cables, where the plastic won't take standard solder temperatures. In testing with some standard copper foil, the paste bonds strongly to the foil using a soldering iron tip temperature of 170 degrees, and this is well below the maximum temperature for these plastics at least for fairly brief periods of time. In scenarios where the base metal won't tin with this solder (I have not tried anything other than clean copper foil at this stage), repair with adhesive copper tape which is then connected electrically using conductive silver paint (which does not have any adhesive bonding strength), will provide a solderable surface. Once I am comfortable with the product, I intend to repair some vintage calculator keyboard assemblies, where a top and bottom layer are bonded, initially through conductive adhesive which has now failed. The plastic used does not melt at the tip temperature used here. Although I have not tried this, it ought to be possible to do reflow soldering using SMD components in a domestic oven set to around 170 degrees. Note that this is quite a brittle solder and so wouldn't be suitable for scenarios where there is significant flexure or vibration, but, again, as I said, it's a specialist product.

### ⭐⭐⭐⭐⭐ Review
*by C***S on 24 December 2024*

Die Gruiqrd Spritzenlötpaste ist eine hervorragende Wahl für niedrigtemperatur Lötarbeiten an empfindlichen Bauteilen. Sie bietet eine gute Lötqualität und eine einfache Handhabung, insbesondere durch die praktische Spritzenform. Die bleifreie Formel und die niedrige Schmelztemperatur machen sie zu einer umweltfreundlichen und sicheren Option für präzise Lötarbeiten. Besonders für BGA, SMD und SMT Anwendungen ist sie eine empfehlenswerte Lötpaste, die auch für Hobby-Elektroniker und Reparaturarbeiten in der professionellen Elektronik empfehlenswert ist. Klare Kaufempfehlung!

## Frequently Bought Together

- Gruiqrd 40g Solder Tin Paste with Syringe,138°C Low Temperature Syringe Solder Paste, Sn42/Bi58 Flux Soldering Paste with 4 Needles and 1 Push Rod, Solder Paste for Bag,PCB, CPU, SMT
- Soldering flux Liquid 50ml oiler- SMD/RMA No Clean,Reflow, Rework, Reball RF800
- Solder Wick, Desoldering Wick with Flux No-Clean Electronic Desoldering Copper Wire Braid Remover Desolder Soldering (Width 0.10'' Length 4.92')

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-28*