Tin/Antimony Paste Solder & Flux Safer, Contains No Lead
Perfect for sweat-on ribs, ramps, sights, etc. Parts can be blued
after soldering. Fast, easy-to-apply paste - fluxes, tins, solders in
one operation - no dripping. Works on copper, brass, steel, all
common metals and some stainless steels.
Big Book Catalog, Issue:66, Page:405
SPECS: Tensile strength 10,000 psi. Melting point
464° F. 95% tin, 5% antimony.