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WARNING: This product can expose you to chemicals including Nitrogen Dioxide, which is known to the State of California to cause cancer, and Carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

RADNOR™ AWS A5.31 Class FB3 A Stay-Silv® 6.5 oz. Bottle

Airgas Part #:RAD64001784

Manufacturer Part #:64001784

$8.36 /Bottle
Package Size Options
$8.36 Bottle
$33.44 Case 4 Bottle / Case

Item Details

  • Stay-Silv® white paste flux is an all-purpose, low-temperature flux for use in silver brazing. For use with most ferrous and non-ferrous metals, not recommended on aluminum, magnesium, and titanium.


  • Homogeneous brazing flux ideally suited for use with a variety of base metals.
  • Formulated to provide smooth flux application, even coverage, and excellent protection during braze heating cycles.
  • Recommended for brazing copper and copper alloys (except aluminum bronze), steel, stainless steel, nickel alloys and other ferrous base metals.
  • Used with many high silver brazing filler metals.
  • Suitable for use with many phosphorus-copper-silver alloys, for brazing copper to brass.
  • White paste flux turns clear (transparent) close to brazing application temperature
  • Active Temp Range: 1050-1600°F (565-870°C)


  • Meets Federal Spec O-F-499 Type B
  • EN 1045 Type FH10
  • AWS A5.31 Class FB3 A
  • AMS 3410


  • Use on applications requiring normal heat
  • For use with silver brazing alloys on all metals except aluminum, magnesium, or titanium.


  • Flux turns clear, (transparent), close to brazing application temperature.
  • This is a useful indicator you are ready to apply braze wire or rod.
  • Flux may be water thinned but care should be taken to avoid excess dilution.

Product Attributes

Alloy Material

» Brazing Flux

AWS Classification

» AWS A5.31 Class FB3 A

Trade Name

» Stay-Silv®


» 6.5 oz.


» Bottle