Soft Solder Fluxes

Our soft solder fluxes are formulated to remove surface oxides and promote clean, reliable solder flow at lower working temperatures. Designed to support effective wetting and joint formation, they help ensure consistent, high-quality results across a wide range of soft soldering applications.

Commonly used in electrical work, plumbing, light fabrication, and specialist applications such as aluminium soldering, these fluxes are supplied ready for use and selected for dependable performance with soft solder alloys.

Why Choose CuP Alloys?

  • Great Value Products - CuP Alloys

    Great Value Products

    Discover premium-quality silver solder and brazing alloys at competitive prices — exceptional performance and reliability for every budget.

  • Free UK Delivery - CuP Alloys

    Free UK Delivery

    Enjoy fast, reliable shipping across the UK mainland with no minimum spend and no hidden delivery charges.

  • Expert Customer Service - CuP Alloys

    Expert Customer Service

    Rely on over 60 years of brazing experience — real advice, technical support, and product guidance from industry specialists.

  • Unbeatable Selection - CuP Alloys

    Unbeatable Selection

    Find everything you need for successful brazing — from silver solder and fluxes to torches and accessories, all in one place.