Oatey 1.7-Ounch Yellow No.5 Paste Flux

  • Similar item or size pictured. Actual item may be slightly different.

1.7-Ounch Yellow No.5 Paste Flux


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* Estimated stock levels as of Mon, Sep 25, 2023. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.

  • Effective on all metals except aluminum and stainless steel
  • Compatible with all common plumbing solder alloys
  • Will not turn copper piping green
  • Good for large diameter copper piping
  • 100% lead-free paste flux cleans and fluxes copper piping to provide uniform solder flow
  • Petroleum base provides cleaning effectiveness
  • NSF standard 14 (performance) and standard 61 (health effects) certified
  • Material is safe for use in potable water applications


Cleans and fluxes at the same time. Blended to clean surface oxidation. 100% lead free. Effective on all metals except aluminum, magnesium, and stainless steel. No pre-cleaning necessary for clean sweat copper fittings, for other applications clean excessive dirt and corrosion. Do not use on electrical parts. Use with solid wire solder.



Applicable Materials Copper, Brass, Zinc, Galvanized Iron And Tin Or Copper Coated Metals
Capacity 1.7 oz
Composition Petrolatum, Zinc Chloride, Ammonium Chloride
Flammability Rating 0
Form Solid
Includes Brush
Series No. 5
Specific Gravity 1.1
Type Paste Flux
Usage Potable Water Applications
VOC Content 29 g/l
Viscosity 20000 - 40000 cPs

Manufacturing Details
The following information is subject to change without notice

Certification, Codes, Standards NSF Approved

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