Rubyfluid Soldering Flux – General Purpose Liquid Flux for Plumbing, Glass & Metalwork | 1 Pint

Overview

Rubyfluid Soldering Flux is a general purpose liquid flux designed to support clean, reliable soldering across a range of materials. From plumbing to stained glass and metalwork, this water-soluble formula is engineered to enhance flow, reduce oxidation, and deliver consistent coverage without harsh solvents.

Crafted for professionals and hobbyists alike, the flux is manufactured in the USA and has a long history of use by tradespeople who value dependable results and easier cleanup at the end of a project.

Studio and workshop versatility

Whether you’re assembling copper pipes, bonding brass fittings, or bridging glass seams, this flux adapts to varied surfaces while helping joints form with steadier wettability.

• Plumbing and HVAC tasks
• Stained glass and decorative metalwork
• Electronic and general metal applications
• All-purpose performance across diverse metals

Performance you can notice

The fast-acting formula promotes rapid wetting and strong joints, reduces oxidation during heat, and supports a clean, even flow on copper, brass, and other metals. Expect a smooth solder path with minimal mess.

• Fast wetting for crisp joints
• Reduced oxidation during heating
• Visible, even coverage across seams

Convenience and care

Because the flux is water-soluble, cleanup is straightforward—rinse with water to remove residue and protect your finished work from long-term corrosion risk. The resealable pint bottle is designed to minimize spills and preserve the formula between uses.

Trust and tradition meet modern practicality: Rubyfluid has served professionals since 1903, and the current formulation brings reliable performance to workshops and studios across the U.S.