Oatey 21018 40/60 Wire Solder, 0.125-Inch Gauge, 1 lb – Tin-Lead General Purpose Solder

Overview

Oatey 21018 is a tin–lead wire solder designed for general purpose use in plumbing and sheet metal work. Available in 40/60 and 50/50 alloys, it supports clean, reliable joints with easy flow as you work. This product is a long-trusted option for professionals and DIYers alike.

Key specifications

• 40/60 alloy with 40% tin and 60% lead; general purpose solder
• Melting range: 360°F – 460°F
• 50/50 alloy option also available
• Contains lead; cannot be used on drinking water lines
• Flux required for best results

Typical uses

• Tin plating and seaming joints
• Copper DWV (drain-waste-vent) systems
• Sheet metal repair and small fabrications

Performance and usage notes

The solder flows smoothly when heated, filling gaps and forming solid joints between metal surfaces. It is well-suited for general repairs and assemblies where lead-containing solder is appropriate. Always follow flux and safety guidelines for clean results.

Safety and recommendations

• Do not use on potable drinking water lines due to lead content
• Flux is recommended to improve flow and minimize oxidation
• Store in a dry place away from heat and open flames

Why choose Oatey

Oatey has earned professional trust for over a century, with products designed for residential and commercial plumbing and metalwork. The brand is supported by strong technical help and dedicated customer service.

How to use

• Prepare and clean the surfaces to be joined.
• Apply flux to the joint if required.
• Heat the joint and feed solder until the gap is filled.
• Allow to cool and inspect the finished joint for smoothness and coverage.