--- product_id: 496064210 title: "Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g)" price: "S$19" currency: SGD in_stock: true reviews_count: 13 url: https://www.desertcart.sg/products/496064210-wonderway-sn42-bi58-t4-lead-free-solder-paste-no-clean store_origin: SG region: Singapore --- # No-clean, strong viscosity 138℃ ultra-low melting point 42% Tin & 58% Bismuth alloy Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) **Price:** S$19 **Availability:** ✅ In Stock ## Summary > ⚡ Solder smarter, not harder — the future of flawless connections! ## Quick Answers - **What is this?** Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - **How much does it cost?** S$19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/496064210-wonderway-sn42-bi58-t4-lead-free-solder-paste-no-clean) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **No-Clean Formula:** Skip the cleanup—leave bright, residue-free welds every time. - • **Smooth Flow, Zero Waste:** Engineered for seamless paste flow, minimizing waste and maximizing efficiency. - • **Versatile Industrial Use:** Trusted for circuit boards, ICs, phones, TVs, and household appliances. - • **Lead-Free Alloy Excellence:** Eco-conscious 42% Tin and 58% Bismuth blend for reliable, RoHS-compliant joints. - • **Precision Melting at 138℃:** Work smarter with ultra-low melting point for faster, safer soldering. ## Overview Wonderway Sn42/Bi58 T4 is a 20g lead-free solder paste featuring a low melting point of 138℃, a high-performance 42% Tin and 58% Bismuth alloy, and a no-clean flux formula. Designed for precision and efficiency, it ensures bright, strong welds with minimal waste, making it ideal for professional electronics assembly across industrial and consumer devices. ## Description Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - desertcart.com Review: Low melt point is perfect for sensitive components, clean joints every time - The low 138C melting point is genuinely useful for soldering heat-sensitive components. I have used this on several PCB rework jobs where I could not risk overheating nearby parts. The paste flows cleanly and produces bright, shiny joints without much residue. The no-clean formula means you can leave it in place without worrying about corrosion. The T4 grind is a good size for most SMD work. One tip: replace the plunger cap after each use to keep the paste from drying out. Overall a quality solder paste at a fair price. Review: Good product - Soldering is not something I am an expert at. This made repairing a ring quite simple. I found if remove the plunger and need and place the caps back on the syringe after use, the solder does not dry out. I have used it several times over the past month and it is still workable. The solder is quite versatile and a good product for the money. ## Features - Paste Content: Alloy Tin 42% Bi58% , Sloder Flux Content: 10.5% - Product Parameters: Total Weight: 29g, Net Weight Of Paste: 20g - Paste Features: No Clean, Strong Viscosity, Bright Welding Point - Product Advantages: Pushing design for Smoother Flowing, No Waste During Welding - Applications: Widely Used In Circuit Board, IC, Phone, TV and Other Household Appliances and Industrial Equipment ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BLSKZ6W1 | | Best Sellers Rank | #4,874 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Soldering Parts & Accessories | | Customer Reviews | 4.5 4.5 out of 5 stars (1,108) | | Date First Available | November 8, 2022 | | Item Package Quantity | 1 | | Item Weight | 1.44 ounces | | Item model number | SP-Sn42Bi58 | | Manufacturer | wonderway | | Material | Solder paste | | Part Number | SP-20G-Sn42Bi58 | | Power Source | fuel_powered | | Product Dimensions | 3.73 x 1.35 x 0.92 inches | | Size | T4 20g | ## Images ![Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - Image 1](https://m.media-amazon.com/images/I/71oRBtkBdoL.jpg) ![Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - Image 2](https://m.media-amazon.com/images/I/71oyp2WMm5L.jpg) ![Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - Image 3](https://m.media-amazon.com/images/I/71RLp25Ra4L.jpg) ![Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - Image 4](https://m.media-amazon.com/images/I/81lS3LKiL7L.jpg) ![Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - Image 5](https://m.media-amazon.com/images/I/81kkv3rxdpL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Low melt point is perfect for sensitive components, clean joints every time *by G***S on May 5, 2026* The low 138C melting point is genuinely useful for soldering heat-sensitive components. I have used this on several PCB rework jobs where I could not risk overheating nearby parts. The paste flows cleanly and produces bright, shiny joints without much residue. The no-clean formula means you can leave it in place without worrying about corrosion. The T4 grind is a good size for most SMD work. One tip: replace the plunger cap after each use to keep the paste from drying out. Overall a quality solder paste at a fair price. ### ⭐⭐⭐⭐⭐ Good product *by O***C on April 7, 2026* Soldering is not something I am an expert at. This made repairing a ring quite simple. I found if remove the plunger and need and place the caps back on the syringe after use, the solder does not dry out. I have used it several times over the past month and it is still workable. The solder is quite versatile and a good product for the money. ### ⭐⭐⭐⭐⭐ Excellent solder, smooth and easy to work with *by J***N on December 26, 2025* This solder worked really well for my projects. It melts smoothly and flowed nicely, which made my joints clean and easy to solder. I also like that it’s lead-free — it gives me extra peace of mind when working in shared spaces. The thickness (Sn42/Bi58) felt just right for both small and medium-sized connections. Overall, I’m very happy with this solder and would buy it again. ## Frequently Bought Together - Wonderway Sn42/Bi58 T4 Lead Free Solder Paste No Clean, 138℃ Melting Point (20g) - Liquid Solder Flux Dropper (30 ml/1 Oz.) I RMA Liquid Solder Flux I Soldering Flux I Electrical Solder I No Clean Liquid Flux I Rosin Flux I Soldering Flux for Electronics I Lead Free Liquid Solder I - Lesnow solder wick braid 10ft Length Desoldering Wick Braid Remover Tool Solder Sucker 1 piece No-Clean soldering Wick Wire Roll and Disassemble Electrical Components --- ## 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.sg/products/496064210-wonderway-sn42-bi58-t4-lead-free-solder-paste-no-clean](https://www.desertcart.sg/products/496064210-wonderway-sn42-bi58-t4-lead-free-solder-paste-no-clean) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-26*