840 Solder Flux for Clean Metals


Use When Soldering Clean or New Copper, Zinc and Stainless Steel



Express Gel Solder Fluxes are designed for soldering copper, zinc and stainless steel metal roofing, wall panels and any project using these metals. This gel flux is perfect for soldering new copper and zinc metal roofing, wall panels and gutters, as well as anything else that needs soldering.

  • 840 Flux (Red Cap) is for use on new, clean metals. 320ml (10.8oz) bottle

Need to solder old, oxidized metals? Use the Express 845 Flux (Black Cap).

This product cannot be shipped by air, so please do not select Next Day Air, 2-Day Air or 3-Day Select.

Hawaii, Puerto Rico and other overseas Customers: UPS & FedEX will not ship this product to Hawaii, Puerto Rico or other overseas destinations with solder flux. 



Additional information

Weight 24 oz
Dimensions 5 × 5 × 4 in

Soldering Tool


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