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Cupronil Fire Scale Preventive - Otto Frei

Cupronil Fire Scale Preventive

Part # 154.390

Single unit weight: -- lbs / -- kg

$5.95
Availability:
99 in stock, ready to be shipped
Availability:
Only 5 left!
Availability:
Out of stock
by Otto Frei
Select Size: 4 oz.

Product Details

Cupronil Fire Scale Preventive is a combination flux and fire coat designed to reduce oxidation and help control solder flow during heating. Especially effective on sterling silver, it forms a protective barrier that minimizes fire scale while supporting clean, bright solder joints. Available in three sizes to suit bench jewelers and high-volume production alike.

Features

  • Combination flux and fire scale retardant in a single product
  • Highly effective on sterling silver; suitable for all non-ferrous metals
  • Acts as an anti-flux to inhibit solder flow to unwanted areas
  • Forms a protective white haze on the surface when properly heated
  • Ideal for soldering silver, gold, and other non-ferrous alloys

Specifications

Product Type Combination Flux & Fire Scale Preventive
Suitable Metals Sterling silver and other non-ferrous metals
Composition Copper, potassium, sodium borate, boric acid

Available Options

Part # Size
154.390 4 oz (118 mL)
154.393 16 oz (473 mL)
154.395 1 Gallon (3.78 L)

Instructions

  1. Stir before use and keep the container closed when not in use.
  2. Apply a smooth, even coat to warmed metal using a spray or soft brush.
  3. Heat metal until Cupronil forms a white haze on the surface.
  4. Touch up any areas not fully coated.
  5. Solder as usual, then pickle, rinse, and polish.

Notes

  • Apply evenly and avoid overheating the metal before the protective white haze has fully formed for best results.
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