Oatey 30133 H205 Water Soluble Paste Flux, 16-Ounce Go to amazon.com Related posts Top flux paster for 2022 FeatureWater flushable.As thick as No. 5 flux.Meets ASTM B-813.VideosHow To SolderWater flushableAs thick as No. 5 fluxMeets ASTM B-813 Description30133 16oz H-20 Water Soluble