#70 Petroleum Paste Flux 2 Oz Tins

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Superior No. 70 is a Petrolatum-based soldering paste that contains Zinc Chloride and Ammonium Chloride. The Petrolatum helps protect the solder joint against corrosive attack and the paste form insures that the flux stays put until soldering.

Superior No. 70 is useful on most common metals except Aluminum and Magnesium. It is employed mainly in plumbing and maintenance applications. 

Superior No. 70 is generally applied using an acid brush. The flux is active between 95°C (200°F) and 315°C/600°F. Although the flux is self-cleaning, it is recommended that the parts first be cleaned with a rough surface. For most applications, the residues can be removed with a damp rag. However, the following cleaning steps must be followed in critical applications:

1. Degrease with an organic solvent.

2. Rinse in hot water containing 2% HCl solution.

3. Use as many hot deionized water rinses as necessary

Instructions for Flux No 70:

1.  Clear surface to be soldered.  Remove dirt, rust, grease, paint, etc. with sandpaper, wire brush, steel wool, etc.  Proceed once clean metal is visible.

2.  Brush FLUX onto all surfaces to be soldered.  Fluxing is critical.  Solder will not bond without FLUX.

3.  Apply heat.  Bring to melting temperature.  Apply solder.  Remove heat.  Allow to cool.  Remove residue with rag.   

SDS Sheet