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White brazing flux paste in a 1 lb jar

Harris

Harris Stay-Silv White Brazing Flux Paste FB3-A 1 lb

SKU CH-E1J7-2V66N

White brazing flux paste active from 1,050 °F to 1,600 °F for high-silver alloys, supplied in a 1 lb jar

  • TypeWelding Supplies
  • Active across 1 050–1 600 °F for reliable silver brazing
  • AWS FB3-A classification confirms alloy compatibility
  • White paste form allows precise joint application
  • 1 lb jar supplies enough flux for multiple jobs
  • Brand-new Harris product ensures consistent factory quality

Product Identity

Harris Stay-Silv White Brazing Flux Paste FB3-A is a 1 lb jar of white paste flux classified to AWS FB3-A. It is formulated for brazing high-silver alloys in automotive, HVAC and general metal-fabrication work. The flux activates between 1,050 Degrees F and 1,600 Degrees F, protecting the joint from oxidation during heating.

Suitability Guidance

This flux suits technicians who braze high-silver filler metals and need a paste that stays in place on vertical or overhead joints. It is not intended for soft soldering, aluminium brazing or fluxes with a lower activation range. Buyers who need a different temperature window or a powder form should look at other products.

Decisive Specification

The AWS FB3-A classification and the 1,050 Degrees F to 1,600 Degrees F active range are the single specifications that confirm the flux matches the filler metal and heating method. Verify that your brazing alloy and process fall within this temperature band before purchasing.

Highlights

  • Active across 1 050–1 600 °F for reliable silver brazing
  • AWS FB3-A classification confirms alloy compatibility
  • White paste form allows precise joint application
  • 1 lb jar supplies enough flux for multiple jobs
  • Brand-new Harris product ensures consistent factory quality

Specifications

BrandHARRIS
TypeWelding Supplies

Questions about this item

What temperature range does the FB3-A flux cover for high-silver alloys?

The paste is active from 1,050 °F up to 1,600 °F, matching the AWS FB3-A classification for high-silver brazing alloys.

How do I apply the white paste flux without contaminating the joint?

Stir the jar thoroughly, then brush a thin, even coat on both surfaces; excess flux can trap oxides and cause porosity, so wipe away any surplus before heating.

When should I replace the 1 lb jar of Stay-Silv flux?

Discard the paste if it dries out, separates, or changes colour, as degraded flux no longer protects the joint at the rated 1,050–1,600 °F range.

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