--- product_id: 627349132 title: "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" brand: "gruiqrd" price: "£14.23" currency: GBP in_stock: true reviews_count: 13 category: "Gruiqrd" url: https://www.desertcart.co.uk/products/627349132-40g-solder-tin-paste-with-syringe-138-c-low-temperature store_origin: GB region: United Kingdom --- # Syringe with 4 needles & push rod Sn42/Bi58 lead-free alloy 138°C melting point 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 **Brand:** gruiqrd **Price:** £14.23 **Availability:** ✅ In Stock ## Summary > 💡 Solder Smarter, Not Hotter – Master delicate repairs with cool precision! ## Quick Answers - **What is this?** 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 by gruiqrd - **How much does it cost?** £14.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/627349132-40g-solder-tin-paste-with-syringe-138-c-low-temperature) ## 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-Performance Flux:** 10.5% flux content guarantees bright, strong welds with no residue - • **Lead-Free & Eco-Friendly:** Sn42/Bi58 alloy ensures no toxic lead, perfect for green tech pros - • **Specialized Repair Solution:** Ideal for delicate PCB, CPU, SMT, and heat-sensitive electronics - • **Precision Low-Temp Soldering:** Melts at a safe 138°C to protect sensitive components - • **Smooth, Controlled Application:** Innovative syringe design with 4 needles and push rod for zero waste ## Overview Gruiqrd’s 40g low-temperature solder paste features a lead-free Sn42/Bi58 alloy with a melting point of 138°C, optimized for sensitive electronics repair. Delivered in a precision syringe with 4 needles and a push rod, it ensures smooth, waste-free application. Its high flux content guarantees bright, reliable joints without residue, making it the go-to choice for professionals tackling PCB, CPU, SMT, and heat-sensitive component soldering. ## Description 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 : desertcart.co.uk: DIY & Tools Review: A brilliant solution for some tricky repair challenges - 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: Quality product - Exactly what I ordered. Flows easily and at a good temperature. ## Features - Gruiqrd Solder Paste Content: Alloy Tin 42% Bi58% , Solder Flux Content: 10.5%. Total Weight: 50g, Net Weight Of Paste: 40g - High Solderability: A high-performance thixotropic agent is added to the solder to make the solder paste highly active. The solder is significantly moistened during the soldering process, thereby reducing the phenomenon of false soldering - Lead-Free Solder Paste: No Clean, Strong Viscosity, Bright Welding Point. Medium Temperature Solder Paste With Flux, Melting Point: 138°C (280F) - Product Advantages: Pushing design for Smoother Flowing, No Waste During Welding. Plunger injection needle features: Reflow soldering will not produce tin beads and tin bridges - Applications: Low-temperature tin is often 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 cannot withstand high temperatures, LED soldering, PCB BGA CPU SMD Maintenance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CZN5H8M8 | | Batteries Required? | No | | Best Sellers Rank | 25,735 in DIY & Tools ( See Top 100 in DIY & Tools ) 15 in Solder Pastes | | Customer Reviews | 4.5 4.5 out of 5 stars (262) | | Date First Available | 2 April 2024 | | Included Components | Syringe Soldering Paste Flux | | Item Weight | 50 g | | Item model number | GR-401 | | Manufacturer | Gruiqrd | | Package Dimensions | 14.4 x 7.4 x 2.7 cm; 50 g | | Part Number | GR-401 | | Power Source | DC | ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/612c7LLRRML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A brilliant solution for some tricky repair challenges *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. ### ⭐⭐⭐⭐⭐ Quality product *by A***N on 4 January 2026* Exactly what I ordered. Flows easily and at a good temperature. ### ⭐⭐⭐⭐⭐ Works for solder repair *by S***E on 16 October 2025* It does what it is meant to do with hot air or iron ## 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') --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/627349132-40g-solder-tin-paste-with-syringe-138-c-low-temperature](https://www.desertcart.co.uk/products/627349132-40g-solder-tin-paste-with-syringe-138-c-low-temperature) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-18*