Solution For Soft Solder, To Blend & Hide Solder Line
Blackens soft solder joints, blends them into bluing for a professional looking finish. Impervious to solvents and oils. For soft solders like Hi-Force 44™. Will also color silver bearing solders but color may rub to a medium gray.
Big Book Catalog, Issue:70, Page:382
SPECS: 4 oz. (118 ml) bottle.