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Amazon [amazon.com] has 8-Oz Oatey Company Lead-Free Solder Tinning #95 Flux Paste (Gray) on sale for $ 8.87. Shipping is free w/ Amazon Prime or on $ 25+
Product Description from Store[list][*]Occupational Health & Safety[*]Country of Manifacturer: Mexico[*]Manufacturer: Oatey[*]Formulated with the same high quality as No. 5. However, patented Oatey silver solder powder is added to pre-tin the copper pipe