SOLAR FLUX WELDING FLUX A back-up flux for use on stainless and chromoly steel that quickly & easily produces x-ray quality welds, without the need of gas purging. Brushing it on back of the joint shields it from oxygen, dissipates heat, cleans the metal, and prevents re-oxidation and heat scale. (Failure to purge or protect the joint back results in porous welds and burn-through) Mix with 100% methyl alcohol (ie ‘Heet’,etc) for best results. For use with any gas or arc welding method. Meets MIL-F-7516B cls 2 & 4. 1 lb can. Non-hazardous. Can be sent air.