FLX - Freeflow Flux
Supplied in 2 ounce bottles. For all gold, silver and platinum soldering.
This is a white borax-based paste which provides substantial oxide protection. This should be used in addition to a firecoat on the joints to be soldered.
The flux becomes clear and fluid at 1100° F (600° C) which makes it a reliable temperature indicator.
Ready to ship next day.