421 - Liquid Tin




NOTE: This product has been replaced with 421A Tip Tinner

The 421 Liquid Tin is a clear immersion tin solution designed to coat copper traces and solder deposits with a thick coating layer of tin. The deposited tin is readily solderable and it extends the work life of circuits by protecting it from corrosion. The excellent corrosion resistance is provided by the pure tin deposit, which is free of co-deposited organics. The 421 ensures good solderability for solder deposits by cleaning them and by making their surface bright and active. ATTENTION! Keep at temperature above 5 °C to avoid unwanted precipitations. If the product freezes, the solution will be ruined.

Features & Benefits

  • No dilution required
  • High tin concentration
  • Clear solution even at room temperature
  • Rinsable residues
  • Very stable solution
Catalog Number Sizes Available Description
421-125ML 125mL (4.2 oz) Liquid
421-500ML 500mL (17 oz) Liquid

Technical Documents

Technical Datasheet (TDS) -

Safety Data Sheet

Warning WARNING! This product can expose you to chemicals including thiourea, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.