Best Weller Solder Wires of 2026

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 5 Feb 2026

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Weller solder wires are a reliable and efficient solution for all your soldering needs. Designed with high-quality materials, these solder wires ensure a strong and durable bond between components. The flux core provides excellent soldering performance, making it easy to achieve clean and precise solder joints. Whether you are a professional or a DIY enthusiast, Weller solder wires are a recommended choice to achieve professional-grade results.

At a Glance: Our Top Picks

Weller WSW SCN M1 Solder Wire 0.5mm Cover #TOP 1
Weller WSW SCN M1 Solder Wire 0.5mm
ftb score rating icon 9.8
Weller Lead Free Solder Wire 0.5mm Cover #TOP 2
Weller Lead Free Solder Wire 0.5mm
ftb score rating icon 9.7
Weller WSW SnPb Solder Wire, 0.3 mm Cover #TOP 3
Weller WSW SnPb Solder Wire, 0.3 mm
ftb score rating icon 9.5

Top 7 Weller Solder Wires

#TOP 1

Weller WSW SCN M1 Solder Wire 0.5mm

T0051404799
Weller WSW SCN M1 Solder Wire 0.5mm Cover
Weller WSW SCN M1 (T0051404799) Solder Wire, Dia: 0.5 mm / 0.020 in, Wt: 100 g / 3.527 oz, Alloy Sn99.3Cu0.6Ni0.05, Flux Content 3.5%

The Weller Solder Wire offers optimised performance with a consistent 100% continuous flux core, ensuring you achieve quality solder joints that are durable and resistant to cracking, even on challenging surfaces. With a low total cost of ownership, you can save on tip consumption and reduce labour time, enhancing your productivity. Additionally, the reduced splash feature increases user safety and keeps your workspace tidy, making your soldering tasks much more efficient.

What We Like
Durable solder joints
High productivity
Enhanced user safety
Low maintenance costs

Weller Lead Free Solder Wire 0.5mm

T0051402799
Silver
0.5mm, 100g
Weller Lead Free Solder Wire 0.5mm Cover
Weller WSW SCN M1 (T0051402799) Lead Free Solder Wire, Ø 0.5mm, Alloy Sn99.3Cu0.6Ni0.05, Flux content 3.5%, 100g

The Weller Solder Wire offers exceptional performance with its 100% continuous flux core, ensuring a reliable soldering experience. You can achieve quality solder joints that are durable and resistant to cracking, even on challenging surfaces. Additionally, this solder wire reduces total costs by minimising tip consumption and saving you valuable time and resources. With reduced splash, it enhances safety for users and maintains a cleaner workspace.

What We Like
High durability solder joints
Reduced tip consumption
Enhanced user safety
Consistent flux performance
#TOP 3

Weller WSW SnPb Solder Wire, 0.3 mm

T0051403399
Weller WSW SnPb Solder Wire, 0.3 mm Cover
Weller WSW SnPb (T0051403399) Solder Wire, Dia: 0.3 mm / 0.012 in, Wt: 100 g / 3.527 oz, Alloy Sn60Pb40, Flux Content 2.2%

The Weller Solder Wire offers optimised performance with a consistent 100% continuous flux core, ensuring reliable soldering. You can achieve high-quality solder joints that are durable and resistant to cracking, even on challenging surfaces. With a low total cost of ownership, this solder wire allows you to save on labour time and resources, boosting productivity by up to 70%. Additionally, the reduced splash feature enhances user safety and keeps your workspace cleaner, making your soldering tasks more efficient and pleasant.

What We Like
High-quality solder joints
Consistent flux core
Increased productivity
Improved safety
#TOP 4

Weller EL99/1-100 1mm Lead Free Solder

T0054025199
Red/Black
Weller EL99/1-100 1mm Lead Free Solder Cover
Weller EL99/1-100 (T0054025199) 1mm 100g Electronic Lead Free Solder for Semi Professional Use

The Weller EL99 Lead Free Solder is designed for semi-professional soldering tasks, offering a reliable solution for lead-free soldering. Its S-Sn99Cu1 composition ensures a high-quality tin-copper alloy, which is ideal for creating strong, clean joints without lead. With 2.2% resin flux according to DIN EN standards, it helps you achieve better solder flow and adhesion, making your work easier and more precise. Being 100% lead free, it provides a safer option for both you and the environment, reducing exposure to harmful substances.

What We Like
100% lead free
High-quality tin-copper alloy
Contains 2.2% resin flux
Suitable for semi-professional use
#TOP 5

Weller WSW SC L0 Lead Free Solder Wire 0.5mm

T0051388099
0.5mm, 500g
Weller WSW SC L0 Lead Free Solder Wire 0.5mm Cover
Weller WSW SC L0 (T0051388099) Lead Free Solder Wire, Ø 0.5mm, Alloy Sn99.3Cu0.7, Flux content 3.5%, 500g

The Weller WSW SC L0 Solder offers optimised performance with a consistent 100% continuous flux core, ensuring reliable work every time. You will benefit from highly durable solder joints that resist cracking, even on challenging surfaces, providing long-lasting results. This solder wire reduces tip consumption by up to 70%, saving you money and time through increased productivity. Additionally, it minimises splash, which helps keep your workspace clean and enhances safety while you work. Overall, this product is designed to make your soldering tasks easier, safer, and more efficient.

What We Like
Consistent 100% flux core
Durable, crack-resistant joints
Reduces tip wear by 70%
Minimises splash for safety
#TOP 6

Weller WSW SAC M1 Lead Free Solder Wire 1.0mm

T0051386599
0.3mm, 500g
0.3mm, 500g
Weller WSW SAC M1 Lead Free Solder Wire 1.0mm Cover
Weller WSW SAC M1 (T0051402499) Lead Free Solder Wire, Ø 1.0mm, Alloy Sn96.5Ag3.0Cu0.5, Flux Content 3.5%, 100g, Silver

The Weller WSW SAC M1 Solder offers exceptional performance with a consistent 100% continuous flux core, ensuring reliable and steady soldering for your projects. You’ll benefit from high-quality, durable solder joints that resist cracking, even on challenging surfaces, giving you confidence in the longevity of your work. This solder wire also reduces tip consumption by up to 70%, saving you time and resources, which increases your overall productivity. Additionally, it minimises splashing, improving your safety and keeping your workspace clean and tidy.

What We Like
Consistent flux core
Durable, crack-resistant joints
Reduces tip consumption
Improves user safety
Maintains workspace cleanliness
#TOP 7

WELLER Electronic Solder SN100NI100+ 1MM Spool

T0051405199
Silver
WELLER Electronic Solder SN100NI100+ 1MM Spool Cover
WELLER Electronic Solder SN100NI100+ 1MM 70G

The WELLER Solder SN100NI100+ offers a flux-filled formulation, making it ideal for soldering in electronics and electrical engineering. The 1 mm diameter is perfect for achieving precise solder joints, ensuring a clean and reliable connection. Made from Sn100Ni with sin plomo, it conforms to EN ISO 9453 and 9454 standards, guaranteeing quality. With a size of 70g, this spool provides ample solder for various projects, giving you convenience and efficiency in your work.

What We Like
Flux-filled formulation
1 mm diameter for precision
High-quality material
70g spool size
Buying Guide Image
Editor's Notes

During our Weller solder wire research, we found 21 Weller solder wire products and shortlisted 7 quality products. We collected and analyzed 5,882 customer reviews through our big data system to write the Weller solder wires list. We found that most customers choose Weller solder wires with an average price of £41.08.

The Weller solder wires are available for purchase. The top 7 picks range in price from a low of £18.00 to a high of £130.00, find the one that fits your budget.

Written by
Jennifer Fraser Avatar

Jennifer Fraser is a licensed contractor specializing in sales, maintenance, and kitchen, bathroom, and home appliances, tools, and utilities. She owns a store in Leeds where you can get any home and tool appliance. Jenny has a degree in literature, but she combines her knowledge and experience with her degree to publish DIY articles on solving home appliances issues to keep up the family enterprise.