--- product_id: 176933987 title: "MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle" brand: "mg chemicals" price: "8 zł" currency: PLN in_stock: false reviews_count: 8 url: https://www.desertcart.pl/products/176933987-mg-chemicals-421a-liquid-tin-tin-plating-solution-125ml-bottle store_origin: PL region: Poland --- # Fast tin plating High tin concentration Rinsable residues MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle **Brand:** mg chemicals **Price:** 8 zł **Availability:** ❌ Out of Stock ## Summary > ✨ Elevate Your Circuit Game with MG Chemicals! ## Quick Answers - **What is this?** MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle by mg chemicals - **How much does it cost?** 8 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/176933987-mg-chemicals-421a-liquid-tin-tin-plating-solution-125ml-bottle) ## Best For - mg chemicals enthusiasts ## Why This Product - Trusted mg chemicals brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Comes with a comprehensive Safety Data Sheet for informed usage. - • **Strong Adhesion:** Designed for industrial use, providing reliable bonding. - • **Clean & Efficient:** Rinsable residues ensure a tidy workspace. - • **Speedy Application:** Tinplates copper circuits in just 7-10 minutes! - • **High-Performance Formula:** No dilution needed—pure tin concentration for optimal results. ## Overview MG Chemicals 421A Liquid Tin is a high-performance tin plating solution designed for industrial applications. This 125mL bottle allows for quick and efficient tin plating of copper circuits on PC boards, achieving results in just 7-10 minutes without the need for dilution. With excellent adhesion and rinsable residues, it ensures a clean and professional finish. ## Description 421A Liquid Tin is a clear yellow immersion tin solution designed to coat copper traces and solder deposits with a thick coating layer of tin. Quickly tinplates copper circuits on PC boards in 7 -10 minutes at room temperature. Provides excellent solderability. Protects against oxidation. No mixing or dilution required. The deposited tin is readily solderable and it extends the work life of circuits by protecting it from corrosion. The pure tin deposit provides excellent corrosion resistance, which is free of co‑deposited organics. 421A ensures good solderability for solder deposits by cleaning them and by making their surface bright and active.Materials and Equipment:The liquid tin should be used with equipment made of polypropylene, polyethylene, Teflon, or similar materials. DO NOT use stainless steel. Heaters should be made of Teflon or quartz.To tin copper or solder deposits:Dilution is not required. Volume lost due toevaporation can be replaced with DI water. Chemical replenishment is not recommended.1. Clean the board.2. Rinse cleaning residues with water.3. Immerse in liquid tin for the duration correspondingto the thickness you need.4. Rinse with warm water.5. Rinse with DI water.6. Dry. Review: very nice tinning solution - Pricey but works well. Review: Does a great job on clean copper - I use a CNC router to make PCB's using a very small end mill. The resulting boards are cleaned with Tarn-X cleaner and then placed in this solution. The result is a uniform coating of tin that both protects the copper from tarnish and wets well with solder. This makes attaching surface mount parts much easier than on bare copper. So far I have made about 100 sq inches of PCB without any sign of exhausting the solution. ## Features - Easily tinplates copper circuits on PC boards in 7-10 minutes - High tin concentration, No dilution required - Rinsable residues - Good adhesion - For industrial use only. Read Safety Data Sheet located on drop down menu before use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B081KRTZ4S | | Age Range Description | Adult | | Best Sellers Rank | #368,453 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #332 in Chemical Acids | | Brand | MG Chemicals | | Brand Name | MG Chemicals | | Color | Yellow | | Color Code | #FFFF00 | | Container Type | Bottle | | Coverage | Per PC board | | Customer Reviews | 4.8 out of 5 stars 94 Reviews | | Finish Type | Gloss | | Full Cure Time | 1E+1 Minutes | | Global Trade Identification Number | 00779008421130 | | Indoor Outdoor Usage | Indoor | | Is Waterproof | True | | Item Form | Liquid | | Item Type Name | Prototyping | | Item Volume | 125 Milliliters | | Item Weight | 140 Grams | | Manufacturer | MG Chemicals | | Model Number | 421A-125ml | | Paint Type | Tin-based | | Part Number | 421A-125ml | | Size | 4.2 Fl Oz (Pack of 1) | | Special Feature | Good adhesion | | Special Features | Good adhesion | | Specific Uses For Product | Interior/Exterior | | Surface Recommendation | Tin | | UPC | 779008421130 | | Unit Count | 4.2 Fluid Ounces | | Warranty Description | warranty@mgchemicals.com | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** MG Chemicals - **Color:** Yellow - **Finish Type:** Gloss - **Size:** 4.2 Fl Oz (Pack of 1) - **Item Volume:** 125 Milliliters - **Special Feature:** Good adhesion - **Unit Count:** 4.2 Fluid Ounces - **Paint Type:** Tin-based - **Specific Uses For Product:** Interior/Exterior - **Surface Recommendation:** Tin ## Images ![MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle - Image 1](https://m.media-amazon.com/images/I/710RvlayqSL.jpg) ![MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle - Image 2](https://m.media-amazon.com/images/I/51Dh3AxZr2L.jpg) ![MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle - Image 3](https://m.media-amazon.com/images/I/816x95NHX0L.jpg) ![MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle - Image 4](https://m.media-amazon.com/images/I/41Ic9wGHMCL.jpg) ## Questions & Answers **Q: Can this be used to "tin" copper tape on pcbs? i'm repairing a gameboy color a/b buttons and have used copper tape to restore the gold contacts. will** A: Yes, this is exactly what it is for. Normally the PC board is bare; no components on it yet. The copper is very lightly sanded with a very fine grit sandpaper so it is nice and shiny; this helps the Liquid Tin to bond to the copper. Then clean the dust off real good, and follow that with ISO. Once dry It is placed in a bath of Liquid Tin for several minutes. In your case, you have components installed and the copper surface is most likely oxidized. You’ll need to get the oxidation off till the copper trace(s) are shiny, then dust off; followed by cleaning with ISO. Then maybe use a Q-tip to apply the Liquid Tin just where you want it. Let it sit there for at least 5 to 10 minutes before washing off with distilled water. You should end up with a nice solderable surface. You *could* skip the Liquid Tin steps and just solder to the cleaned and shiny copper contacts but using LT will end up a better repair. ## Customer Reviews ### ⭐⭐⭐⭐⭐ very nice tinning solution *by J***L on February 24, 2025* Pricey but works well. ### ⭐⭐⭐⭐⭐ Does a great job on clean copper *by A***R on September 23, 2023* I use a CNC router to make PCB's using a very small end mill. The resulting boards are cleaned with Tarn-X cleaner and then placed in this solution. The result is a uniform coating of tin that both protects the copper from tarnish and wets well with solder. This makes attaching surface mount parts much easier than on bare copper. So far I have made about 100 sq inches of PCB without any sign of exhausting the solution. ### ⭐⭐⭐⭐⭐ Great for tinning bare copper. *by B***E on December 3, 2022* We like this liquid tin - it tins nicely, and quickly. We were looking for a replacement for the old TINNIT kit, and found this. It works WAY better than anything we've used. Just a word of caution - wear gloves when using the stuff - it has thiourea - nasty stuff, so use all the precautions as directed. Great stuff indeed. ## Frequently Bought Together - MG Chemicals 421A Liquid Tin, Tin Plating Solution, 125mL Bottle - MG Chemicals 415-1L Ferric Chloride, 1 Quart - MCIGICM FR-4 Copper Clad PCB Laminate Circuit Board, Single Side, 4 x 2.7 inch (10Pcs) --- ## 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.pl/products/176933987-mg-chemicals-421a-liquid-tin-tin-plating-solution-125ml-bottle](https://www.desertcart.pl/products/176933987-mg-chemicals-421a-liquid-tin-tin-plating-solution-125ml-bottle) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-27*