Nokorode, 4 OZ, Regular Paste Flux, A Lead Free, All Purpose, Soft Soldering Paste Flux Ideal For Use With 95/5 & Other Common Solders, Oil Base Protects The Solder Joint Against Corrosive Attack, Cleans & Fluxes All At 1 Time, When Heated, It Reduces Surface Tension & Allows The Solder To Flow Easily & Uniformly Into The Joint, Works To Deliver A Strong, Leak Free Joint, Ideal When Used On Copper & Brass Fittings.