An active Cast Iron Powder Flux with a working temperature range of 800-1500C. Sif Cast Iron Powder Flux allows for deeper penetration of the joints, resulting in higher bond strength This Powder Flux complies to EN 1045 FH20 Sif Cast Iron Powder Flux is designed to weld Cast Iron with a Cast Iron rod and can be used with SuperSilicon No9 and Super SG rods.