A flux used in TIG applications to shield the rear of a weld joint from oxygen contamination, dissipate heat and oxides during welding and prevent re-oxidation. Formulated to suit stainless steel and high nickel super alloys To apply, mix flux with methanol amp brush over rear of joint Sif Purging flux is inert, non-flammable and non-explosive Ideal for pipe and tube welding applications Supplied in 500g jar