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Express 845 Soldering Flux for Oxidized Copper & Zinc Metals

Price range: $20.00 through $108.00

(1 customer review)

Made for Metal That’s Already Weathered

Express 845 Soldering Flux for Oxidized Metals is specially formulated for soldering weathered, exposed, and oxidized sheet metals where standard fluxes may not provide reliable results. Designed for copper, zinc, and other roofing metals that have developed surface oxidation over time, this professional-grade flux helps promote proper solder flow and strong, durable joints.

  • Formulated specifically for weathered and oxidized metal
  • Ideal for copper, zinc, and brass roofing applications
  • Built-in brush for controlled application
  • Helps promote proper solder flow on oxidized surfaces
  • Available individually or in a 6-pack
  • 10.8 fl. oz. per bottle
  • Ground shipping only — no expedited or international shipping

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Customer Reviews


1 review for Express 845 Soldering Flux for Oxidized Copper & Zinc Metals

  1. Ben Davison

    Excellent flux that works well on copper and galvanized steel, both clean and when oxidized. Washes away easily. My go to flux for the repair and small scale flashing fabrication work that I do. Shipping from Stortz is quite expensive ($23 for $48 in product) but they are otherwise really great to deal with and I really appreciate their hard to find tools and consumables. Also their instructional videos are wonderful.

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