Kester 60/40 Rosin Core Solder - 1LB Spool, .025" Diameter

High-Quality Solder for Easy Electronics Projects

Looking for reliable solder that works great for DIY projects, electronics repair, or home prototyping? The Kester 60/40 rosin core solder delivers smooth, consistent results that make soldering easy—even for beginners.

Trusted Kester 60/40 Solder for Clean, Strong Connections

Kester solder is a top choice for hobbyists and professionals because it melts evenly and creates strong, reliable joints. The 60% tin / 40% lead alloy is the industry standard for excellent electrical connections, low melting point, and minimal spatter. The built-in “44” RA activated rosin core helps ensure clean and easy soldering with no extra flux required.

Perfect Size Rosin Core Solder for DIY and Repairs

This solder spool features a slim .025" (0.64 mm) diameter, making it perfect for circuit boards, delicate wiring, small components, and crafts. The 1 pound (16 oz / 454 gram) spool will last through many projects.

Key Features & Technical Specs

• Alloy Mix: 60% Tin, 40% Lead
• Diameter: .025" (0.64 mm)
• Weight: 1 Pound (454 grams)
• Core Type: “44” Resin “RA” Activated Rosin
• Part Number: 24-6040-0018
• View Kester 60/40 Solder Spec Sheet (PDF)

Why Choose Kester Solder?

Kester is one of the most trusted brands for soldering supplies. Their solder is known for easy flow, strong bonds, and clean results—perfect for beginners, hobbyists, and anyone who needs dependable, easy-to-use solder.

Great For

• Electronics repair and home projects
• Prototyping and building circuits
• Wire joining and small appliances
• Hobbyist and maker crafts