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MG Chemicals 421 Liquid Tin, 125 ml Bottle

4.5 out of 5 stars 36 customer reviews
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Price: $14.99 ($14.99 / Bottles) & FREE Shipping on orders over $35. Details
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125 mililiters
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  • Quickly tinplates copper circuits on PC boards in 5 minutes or less at room temperature
  • Provides excellent solderability
  • Protects against oxidation
  • No mixing or dilution required
  • For commercial/industrial use only

Product Specifications
EAN 0779008421123
Number of Items 1
Part Number 421-125ML
Size 125 mililiters
UPC 779008421123
Specification for this product family
Brand Name MG Chemicals
Manufacturer Series Number 421
UNSPSC Code 32130000

This MG Chemicals 421 Liquid Tin is a clear immersion tin for coating a cop... See more product details


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Special Shipping Information: This product may not be available for 1 or 2 day shipping due to federal regulations that require it to ship via ground ship methods only. This product can only be shipped within the 48 contiguous states.


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$14.99 ($14.99 / Bottles) & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com.

Frequently Bought Together

  • MG Chemicals 421 Liquid Tin, 125 ml Bottle
  • +
  • MG Chemicals 415 Ferric Chloride Liquid, 1 Quart Bottle, Dark Brown
  • +
  • Copper PC Board 12 x 12 Single Sided
Total price: $44.51
Buy the selected items together

Product Description

Size: 125 mililiters

This MG Chemicals 421 Liquid Tin is a clear immersion tin for coating a copper substrate or solder deposit with a dense tin coating. It tinplates copper circuits on PC boards in 5 minutes or less at room temperature for immediate soldering capability. It leaves a dense coating, and it contains no co-deposited organics for strong resistance to oxidation. Liquid Tim can be readily soldered, has a long shelf life, and does not require mixing or diluting. Residues can be rinsed away with warm water for easy cleanup. Liquid Tin will cover 3600 square inches of board per half liter of solution, and it is Restriction of Hazardous Substances (RoHS) compliant. This solution is strongly acidic; protective gloves, clothing, and eye protection must be worn.

MG Chemicals manufactures chemical products for the electronics industry. The company, founded in 1955 and headquartered in Surrey, BC, Canada, meets International Organization for Standardization (ISO) standard 9001.


Product Details

Size: 125 mililiters
  • Shipping Weight: 5.6 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B005T8PE4A
  • Item model number: 421-125ML
  • Average Customer Review: 4.5 out of 5 stars 36 customer reviews
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Customer Reviews

Top Customer Reviews

Size: 125 mililiters Verified Purchase
This product arrived on time and as advertised. I create custom PCBs for my electronic projects and this product is totally amazing. After etching the copper boards a quick dip in this liquid applies a tin coating that makes soldering components very easy as well as protecting the copper traces from oxidation. i recommend this product and vendor.
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Size: 125 mililiters Verified Purchase
The bottle was appropriately packaged and arrived quickly.

The tinning liquid is very easy to use. You need to start with a clean PCB, free of corrosion/tarnish, hand oil, bits of transfer paper and the like. Here is what I do. I scrub the copper traces under running water with a nylon scrubby pad to remove any tarnish. The next step is to wipe it down with acetone (Not fingernail polish remover... It has to conditioners in it) to remove any hand oil. The final step is to wipe it down, again, with rubbing alcohol, to remove any residue.

Throughout the process, you need to be mindful to not touch the board, again, and contaminate it. Handle it by its edges.

When thoroughly clean, place the PCB in a clean glass, or Pyrex, bowl. The bowl needs to be large enough to allow the PCB to lie flat on the bottom and deep enough to contain the tinning solution. It should be sized such that you can immerse the PCB in the fluid.

Add the tinning fluid to cover the PCB, but not so deep as to waste it. Call it 1/4".

The magic starts almost instantly. I gently rock the bowl to keep the solution stirred... Well, so as to have an excuse to watch the transformation, anyway... The tinning process is finished in just five minutes, or so. The board comes out looking like it was professionally tinned!

Cleaning up is a breeze. I use a funnel to pour the remaining fluid back into the bottle. I rinse the bowl and put it in the dishwasher.

The results are impressive and worthy to be shown-off to friends. The tinning also helps with solder adhesion.

I like this product and I will by it again.
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Size: 475 milliliters Verified Purchase
It is good stuff. It will instantly change copper to tin traces on a printed circuit board. Dip it in solution and its good to go.
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Size: 475 milliliters Verified Purchase
For years I have used the Tin-It type of crystals to tin PCBs. That solution will go bad and not work after several months. I don't do a ton of boards, so having a solution that keeps on the shelf longer is very nice.

I used this to do a few small 1.25"x3" boards and you can see the tin covering the board as fast as the boards are dipped into the solution.
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Size: 125 mililiters Verified Purchase
Get a small plastic funnel, some shallow tupperware, and follow the directions.
This works quickly and doesn't produce tons of fumes. Outside use is recommended though. You won't be out there long.

Enjoy!
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Size: 125 mililiters Verified Purchase
SRA contacted me to say the product was backordered, but despite splitting the shipment everything arrived before the expected date. Not my first purchase from SRA - and will definitely not be my last.
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By Ron on September 18, 2013
Size: 475 milliliters Verified Purchase
Easily the best liquid tin solution I've used (25+ years). Kinda stinks tho, so make sure you have good ventilation.
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By John G.Rhiel on November 26, 2013
Size: 125 mililiters Verified Purchase
This item worked like a champ, I was very impressed by its coating ability. Tes i would recommend this product.
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MG Chemicals 421 Liquid Tin, 125 ml Bottle
This item: MG Chemicals 421 Liquid Tin, 125 ml Bottle
Price: $14.99
Ships from and sold by Amazon.com