Finding a Flux by Application
The following table is an easy-to-use chart that helps you find the right flux for your application. We have many fluxes in addition to those that appear in the chart below. If you need assistance, Contact Us. If you aren’t sure of the part number, or would like to view additional options, please use the following resources:
How to Find the Right Flux – An easy-to-follow guide that helps you understand and choose fluxes.
Find a Flux by Name – A chart that lets you find more information about a flux when you already know the part number.
Find a Flux by Specification – A chart that lists fluxes per various industry and/or government specifications.
Flux by Application – Easy-to-use flux table that matches fluxes with applications.
| Process | Metal / Application | Additional Info. | Solder / Braze Alloy | Temperatures | Link | Recommendation |
|---|---|---|---|---|---|---|
| Soldering | Aluminum | Low Temp | Tin-Based | 177 - 288¡C 350 - 550¡F | Aluminum Soldering Flux | No. 1261 |
| Soldering | Aluminum | High Temp | Zinc-Aluminum | 345 - 425¡C 650 - 800¡F | Aluminum Soldering Flux | No. 1280 |
| Brazing | Aluminum Brazing | Torch Brazing | 4047/718, 4145/716 | 345 - 690¡C 650 - 1275¡F | Aluminum Brazing Flux | No. 20 |
| Brazing | Aluminum Brazing | Controlled Atmosphere Brazing | Silicon Aluminum | 580 - 610¡C 1076 - 1130¡F | Aluminum Brazing Flux | No. 1250 |
| Brazing | Aluminum Bronze Brazing | Torch Brazing | Silver-Bearing Braze Alloys (BAg) | 580 - 610¡C 1076 - 1130¡F | Aluminum Bronze Brazing Flux | No. 625 |
| Welding | Aluminum Welding Flux | Oxy-Acetlyne Torch | 1100-Series, Aluminum Filler Rod | 570 - 700¡C 1050 - 1300¡F | Aluminum Welding Flux | Anti-Borax No. 8 |
| Soldering | Battery Cast-on-Strap | Lead Batteries | Lead-Based | 260 - 455¡C 500 - 850¡F | Battery CoS Fluxes | See Web Page |
| Soldering | BGA Attachment: Tacky Flux | Tacky Flux: No-Clean and Water-Soluble | Tin-Based | 120 - 400¡C 250 - 750¡F | Tacky Flux: BGA Assembly | See various tacky fluxes |
| Brazing | Borate-Free Brazing Flux | Torch/Furnace Brazing | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 485 - 870¡C 900 - 1600¡F | Borate Free Brazing Flux | No. 670 |
| Brazing | Boric Acid Free Brazing Flux | Torch/Furnace Brazing | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 485 - 870¡C 900 - 1600¡F | Boric Acid Free Brazing Flux | No. 6, No. 601FP |
| Soldering | Brass | Brass-to-Brass, Brass-to-Copper | Tin-Based | 260 - 425¡C 500 - 800¡F | Brass Soldering Flux | No. 90, No. 90-Paste, No. 520B |
| Brazing | Bronze Brazing Flux Powder | Low Fuming Bronze | BAg, BCu, BNi, BAu, RBCuZn | 760 - 1205¡C 1400 - 2200¡F | Bronze Brazing Powder Flux | Anti-Borax No. 2 |
| Brazing | Carbide Brazing | For large and small carbide parts | Nickel Braze Alloys | 760 - 1205¡C 1400 - 2200¡F | Carbide Brazing Flux | No. 609LB, No. 612 |
| Welding | Cast Iron Welding Flux | Cast Iron | n/a | 815 - 1540¡C 1500 - 2900¡F | Cast Iron Welding Flux | Anti-Borax No. 1 |
| Soldering | Component Lead Tinning | Copper | Tin-Based | 95 - 315¡C 200 - 600¡F | Component Lead Tinning | No. 30, No. 45 |
| Soldering | Component Lead Tinning | Nickel | Tin-Based | 95 - 315¡C 200 - 600¡F | Component Lead Tinning | No. 40MM4, No. 45DSA |
| Soldering | Component Lead Tinning | Halogen-Free | Tin-Based | 200 - 280¡C 390 - 540¡F | Component Lead Tinning | No. 430MB, No. 435 (3:1) |
| Soldering | Copper | General Purpose, Safer Flux | Tin-Based | 95 - 315¡C 200 - 600¡F | Superior Supersafe | No. 30 |
| Soldering | Copper - Badly Oxidized | Inorganic Acid flux | Tin-Based | 95 - 345¡C 200 - 650¡F | Copper Soldering Flux | No. 75, No. 130 |
| Soldering | Copper Pipes - Plumbing | Petroleum Based | Tin-Based | 93 - 315¡C 200 - 600¡F | Plumbing Fluxes | No. 130 |
| Soldering | Copper Pipes - Plumbing | Water-Soluble (ASTM B-813) | Tin-Based | 93 - 315¡C 200 - 600¡F | Plumbing Fluxes | No. 141 |
| Soldering | Copper-Brass Radiator | Copper, Brass | Tin-Based | See Web Page | Radiator Fluxes | Fluxes for all parts of copper-brass radiators |
| Soldering | Core Fluxes | For making cored solder wire | See Web Page | See Web Page | Solder Core Flux | See choices |
| Soldering | Dross Reducer Powder | Reduces Dross Waste | Tin-Based | 235 - 260¡C 455 - 500¡F | Dross Reducer Powder | Dross Reducer Powder |
| Soldering | Electronics Wire Tinning | Copper, Nickel | Tin-Based | 200 - 280¡C 390 - 540¡F | Electronics Wire Tinning | No. 30, No. 45 |
| Soldering | Electronics Wire Tinning | No-Clean | Tin-Based | 200 - 270¡C 390 - 520¡F | Electronics Wire Tinning | No. 334 |
| Brazing | Fluoride-Free Brazing Flux | Torch/Furnace Brazing | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 685 - 980¡C 1270 - 1800¡F | Fluoride-Free Brazing Flux | No. 650 |
| Welding | Forge Welding Flux Powder | Ferrous Alloys | n/a | Welding Temps | Forge Welding Flux Powder | See selection. |
| Soldering | Galvanized Steel | Also good for Zinc | Tin/Lead | 95 - 425¡C 200 - 800¡F | Galvanized Steel Soldering Flux | No. 71 |
| Brazing | Hi-Temp Silver Brazing | "Black Flux" - Boron Modified | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 565 - 980¡C 1050 - 1800¡F | Hi-Temp Black Silver Brazing Flux | No. 601B/3411 |
| Soldering | Hot Air Leveling Flux | PCB Fabrication | Tin-Based | Per heat cycle | Hot Air Leveling Flux | HASL-1 |
| Soldering | Industrial Continous Wire & Strip Tinning | Copper, Steel, Brass | Tin-Based | See Web Page | Wire and Strip Tinning | Fluxes for various gages and alloys |
| Brazing | Jewelry Brazing Flux | Bifluoride-Free | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 485 - 870¡C 900 - 1600¡F | Jewelry Brazing Flux | No. 6 |
| Brazing | Liquid Brazing Flux | Torch/Furnace Brazing | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 590 - 870¡C 1095 - 1600¡F | Liquid Brazing Flux | No. 25, No. 29 |
| Brazing | Magnesium Brazing Flux | Torch, Oven, Induction Brazing | Magnesium Brazing Alloys | 480 - 620¡C 900 - 1150¡F | No. 21 | |
| Soldering | Nickel | Organic Acid | Tin-Based | 95 - 315¡C 200 - 600¡F | Component Lead Tinning | No. 40MM4, No. 45 |
| Soldering | PCB Repair Flux | Tacky Flux | Tin-Based | 120 - 400¡C 250 - 750¡F | Tacky Flux: BGA Assembly | No. 3000, No. 9000 |
| Soldering | PCB Repair Flux | Rosin Flux - Type RMA | Tin-Based | 200 - 260¡C 390 - 500¡F | PCB Repair Flux | No. 99 |
| Soldering | PCB Repair Flux | Water-Soluble Gel Flux/Cleaner | Tin-Based | 95 - 315¡C 200 - 600¡F | PCB Repair Flux | Sybergel |
| Soldering | PCB Selective Soldering | No-Clean, VOC-Free | Tin-Based | 200 - 350¡C 390 - 660¡F | Selective Soldering Flux | SSF-NC50 |
| Soldering | PCB Selective Soldering | No-Clean, Alcohol-Based | Tin-Based | 200 - 350¡C 390 - 660¡F | Selective Soldering Flux | SSF-NC400 |
| Soldering | PCB Selective Soldering | Water-Soluble | Tin-Based | 200 - 350¡C 390 - 660¡F | Selective Soldering Flux | SSF-WS800 |
| Soldering | PCB Selective Soldering | Rosin Flux - Type RMA | Tin-Based | 200 - 350¡C 390 - 660¡F | Selective Soldering Flux | SSF-RMA20 |
| Soldering | PCB Selective Soldering | Tinning of Solder Nozzle | Tin-Based | 95 - 350¡C 200 - 660¡F | Selective Soldering Flux | No. 75, No. 23 |
| Soldering | PCB Wave Solder | Water-Soluble | Tin-Based | 200 - 315¡C 390 - 600¡F | PCB Wave Soldering Flux | No. 80, No. 84 |
| Soldering | PCB Wave Solder | No-Clean, Alcohol, (2% Solids) | Tin-Lead | 200 - 270¡C 390 - 520¡F | PCB Wave Soldering Flux | No. 312 |
| Soldering | PCB Wave Solder | No-Clean, Alcohol, (3% Solids) | Lead-Free | 200 - 270¡C 390 - 520¡F | PCB Wave Soldering Flux | No. 325 |
| Soldering | PCB Wave Solder | No-Clean, Alcohol, (4% Solids) | Lead-Free | 200 - 270¡C 390 - 520¡F | PCB Wave Soldering Flux | No. 315LF |
| Soldering | PCB Wave Solder | No-Clean, VOC-Free (2% Solids) | Tin-Lead | 200 - 270¡C 390 - 520¡F | PCB Wave Soldering Flux | No. 420F |
| Soldering | PCB Wave Solder | No-Clean, VOC-Free (4% Solids) | Lead-Free | 200 - 270¡C 390 - 520¡F | PCB Wave Soldering Flux | No. 420F-LF |
| Soldering | Preform Coating Flux | No-Clean & Water-Soluble | See Web Page | See Web Page | Preform Coating Flux | See choices |
| Soldering | Roof Soldering | Copper or Steel | Tin/Lead | 95 - 315¡C 200 - 600¡F | Roof Solder Flux | RubyFluid Flux |
| Soldering | Rosin Flux | Type R | Tin-Based | 200 - 260¡C 390 - 500¡F | Rosin Fluxes | No. 97 |
| Soldering | Rosin Flux | Type RMA | Tin-Based | 200 - 260¡C 390 - 500¡F | Rosin Fluxes | No. 99 |
| Soldering | Rosin Flux | Type RMA - Paste | Tin-Based | 200 - 260¡C 390 - 500¡F | Rosin Fluxes | No. 9000 |
| Soldering | Rosin Flux | Type RA | Tin-Based | 200 - 260¡C 390 - 500¡F | Rosin Fluxes | No. 100 |
| Soldering | Rosin Flux | Type RA - High Temp | Tin-Based | 200 - 450¡C 390 - 840¡F | Rosin Fluxes | No. 100HT |
| Brazing | Silver Brazing or Silver Solder | White Flux Paste | Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP) | 565 - 870¡C 1050 - 1600¡F | Silver Brazing White Paste Flux | No. 601 |
| Soldering | SMT PCB Boards: Solder Paste | Solder Paste: No-Clean and Water-Soluble | Lead-Free, Lead Bearing | 200 - 260¡C 390 - 500¡F | SMT Solder Paste | See various pastes |
| Soldering | Solder Paste (Surface Mount) | No-Clean | SAC305, Type 3 | Liquidus: 217C/423F Max: 250C/482F | No-Clean Solder Paste, SAC305, Type 3 | 592-63-885 (Jars, Cartridges); 592-63-86 (Syringes) |
| Soldering | Solder Paste (Surface Mount) | No-Clean | SAC305, Type 4 | Liquidus: 217C/423F Max: 250C/482F | No-Clean Solder Paste, SAC305, Type 4 | 592-64-825 (Jars, Cartridges); 592-64-86 (Syringes) |
| Soldering | Solder Paste (Surface Mount) | No-Clean | SAC305, Type 5 | Liquidus: 217C/423F Max: 250C/482F | No-Clean Solder Paste, SAC305, Type 5 | 592-65-88 (Jars, Cartridges); 592-65-86 (Syringes) |
| Soldering | Solder Paste (Surface Mount) | No-Clean | Sn96.5/Ag3.5, Type 3 | Liquidus: 221C/430F Max: 250C/482F | No-Clean Solder Paste, Sn96.5/Ag3.5, Type 3 | 592-33-885 (Jars, Cartridges); 592-33-86 (Syringes) |
| Soldering | Soldering Salts | Bare Copper, Cast Iron Babbitt | Tin/Lead, Tin/Antimony | 130 - 500¡C 265 - 930¡F | Soldering Salts & Babbitt Flux | Tara 350 |
| Soldering | Stained Glass | Copper Foil | Tin-Based | 95 - 315¡C 200 - 600¡F | Stained Glass | No. 30 or RubyFluid |
| Soldering | Stainless Steel | Active Flux Required | Tin-Based | 95 - 425¡C 200 - 800¡F | Stainless Steel Soldering Flux | No. 71 |
| Welding | Stainless Steel Backup Flux | Stainless Steel, High-Chromium Ferrous & Low-Nickel Alloys | n/a | 1090 - 1540¡C 2000 - 2900¡F | Stainless Steel Backup Flux | No. 9H |
| Brazing | Titanium Brazing Flux | Torch, Oven, Induction Brazing | BAg 34 | 650 - 760¡C 1200 - 1400¡F | Titanium Brazing Flux | TiBF-16 |
| Soldering | Zinc Metal | Inorganic Acid flux | Tin-Based | 260 - 425¡C 500 - 800¡F | Soldering Flux for Zinc Metal | No. 71 Paste, No. 71 |