Stay-Silv® Black Flux Brazing Flux HARRIS

Stay-Silv® Black Flux is a homogenous paste brazing flux formulated to provide smooth application, uniform coverage, and dependable protection during brazing operations. The inclusion of boron extends the active life of the flux, allowing it to remain effective during longer heating cycles.

This extended activity makes it especially suitable for induction brazing applications where intense localized heating occurs, as well as for brazing heavier components that require longer heating times to reach proper brazing temperature.

The flux supports consistent filler metal flow while protecting base metals from oxidation, contributing to strong and reliable brazed joints in industrial and HVAC applications.

Key Benefits

Smooth paste consistency allows easy application
Provides even coverage and joint protection
Extended flux life supports long heating cycles
Suitable for induction brazing operations
Protects base metals from oxidation
Supports reliable filler metal flow and joint formation

Specifications

Product Name: Stay-Silv® Black Flux
Product Type: Brazing Paste Flux
Form: Homogenous paste
Activity Range: 1050°F to 1700°F (565°C to 925°C)
Flux Enhancement: Boron addition for extended active life
Recommended Heating Methods: Flame and induction brazing
Available Container Sizes: ½ lb jars, 1 lb jars, 5 lb jars, 30 lb pails, and 60 lb pails
Specification Compliance: AWS A5.31 FB3 C, AMS 3411, Federal Specification O-F-499 Type B, EN 1045 Type FH12

Applications

Induction brazing operations
Heavy component brazing requiring longer heating
HVAC and refrigeration assembly work
Industrial fabrication and repair brazing
Production brazing operations

FAQs

Why is Stay-Silv® Black Flux suitable for induction brazing?
Its extended activity allows it to remain effective during intense localized heating cycles.

What advantage does boron provide in the flux?
Boron extends flux activity, allowing protection over longer heating periods.

Is this flux suitable for heavy parts?
Yes, it performs well where longer heating cycles are required.

In what packaging sizes is the flux available?
It is supplied in containers ranging from ½ lb jars up to 60 lb pails.