77-Electrode Non-Cracking Cast Iron Welding Rod 72 Burnt Cast Iron Electrode SSF-6 56% Silver Solder
       
Sizes Available (in.) 5/32in, 1/8in, 3/32in 5/32in, 1/8in, 3/32in 1/16in
Sizes Available (mm) 3.96mm, 3.17mm, 2.38mm 3.96mm, 3.17mm, 2.38mm 1.58mm
Arc - TIG - Braze Arc - TIG Arc - TIG Braze
Works on engine blocks? Yes No Yes
Works on large cast iron holes? Yes Yes No
Joins cast iron to steel? Yes Yes No
Joins cast iron to metals other than steel? No No Yes
Works on exhaust manifolds, woodstoves, or other burnt cast iron? Good Great Good
Works on thin cast iron? Yes Yes Yes, even very thin
Color match? Good Good No
All position? Yes Yes Yes
Machineable? Yes No Yes
Paintable? Yes Yes Yes
Works over existing welds? Fair-- better on unwelded surface Fair Great
Crack resistant? Yes No Yes
Depth to bevel cracks 3/4 through 3/4 through 1/2 through