Top 10 Best paste flux in 2026

Main highlights

• •ENOUGHT QUANTITY: The package includes 2 jars of soldering flux. A total of 70 g. Enough quantity for your use.
• •NON-CORROSIVE: Rosin is not conductive in dry conditions and has good insulation. Is not corrosive to metal substances such as circuit boards.
• •OXIDATION RESISTANCE: Anti-oxidation effect on soldering iron head of gold-copper alloy substrate. Solder flux for semi-solid, not easy to dump.
• •STRONG APPLICABILITY: Flux is suitable for welding instruments, gold, copper, tin, iron and other metals. Ideal for electronic welding, repair and rework.
• •WHAT YOU GET: Rosin soldering flux paste * 2, our 7*24 friendly customer service for peace of mind.

Main highlights

• •Lead-Free, Excellent Wetting, No Need To Clean After Using
• •Non-Corrosive And Non-Conductive In Dry Conditions
• •Product Advantages: Pushing-Type Design Smoother Flowing No Wasting During Welding
• •High Activity Rosin Can Help To Remove The Oxide Layer On The Welding Surface Easily.
• •Suitable For Soldering PCB, SMD, SMT, Handwork, Phone, Home Appliance and Meters Repairing

Main highlights

Main highlights

• •Packing List: One box of 10g/0.35oz flux paste. The flux paste is yellow in colour and comes in a metal tin.
• •Product Features: The flux has excellent wetting properties, weldability, and insulation properties. It leaves minimal residue, produces little smoke, and has no irritating odour.
• •Easy to Use: Can be applied by squeezing, brushing, using a cotton swab, or dipping.
• •Usage Instructions: Before soldering, clean the surface of the item to be soldered. Apply the solder paste to the metal surfaces (such as copper, iron, or tin) to be soldered, then use a soldering iron to melt the solder at the soldering point. It facilitates smoother solder flow and is a reliable tool for repairs and soldering.
• •Application Scenarios: The solder paste is suitable for mobile phone repairs, computer motherboards, home appliance repairs, and more.

Main highlights

• •EASY TO USE: ‍Our silver solder paste syringe offers a no-mess, no-waste way to disperse the soldering paste. It’s designed for easy application with little to no skill required for DIY projects and tasks.
• •HIGH CONDUCTIVITY: It’s excellent for electrical work and instrument assembly where high electrical conductivity is required. You can use it on jewelry, electronic components, wiring, and circuit board work.
• •CORROSION-RESISTANT: Our solder flux paste stays bright and doesn't turn black. This makes it ideal for brass, bronze, nickel, stainless steel joints, copper-based metals, and steel.
• •EXTREMELY TOUGH: It has 10,000-25,000 PSI tensile strength, making it 5x stronger than conventional solder wire. It also has a low melting point that allows it to flow smoothly at 430 F and re-melt at 650 F.
• •SETS INSTANTLY: It helps prevent soldering failure due to moving parts while soldering because of the instant setting. It’s also non-toxic and contains no lead, cadmium, antimony, or zinc.

Main highlights

• •HIGH QUALITY:This soldering flux made of high purity rosin materials soldering flux lead-free, halogen free, non-corrosive, and with good flow ability.
• •PRODUCT ADVANTAGES:Stable Performance And Low Volatility, less Smoke, environmental protection series.
• •WIDELY APPLICABLE: The solder flux is suitable for welding instruments, gold, copper, tin, iron and other metals. Ideal for electronic welding, repair and rework.
• •NON-CORROSIVE:The rosin soldering flux is not conductive in dry conditions and has good insulation. So it is not corrosive to metal substances such as circuit boards.
• •EASY TO USE: The rosin soldering flux paste with pushing-type design, just gently push the push rod, the flux will slowly overflow, it is very convenient to use, it will smoother flowing no wasting during welding, after the use of the cover can be sealed.

Main highlights

• •EASY TO USE: ‍Our silver solder paste syringe offers a no-mess, no-waste way to disperse the soldering paste. It’s designed for easy application.
• •HIGH CONDUCTIVITY: It’s excellent for electrical work and instrument assembly where high electrical conductivity is required.
• •CORROSION-RESISTANT: Our solder flux paste stays bright and doesn't turn black. It makes it ideal for brass, bronze, nickel, stainless steel joints, copper-based metals, and steel.
• •EXTREMELY TOUGH: It has 10,000-25,000 PSI tensile strength, making it 5x stronger than conventional solder wire. It also has a low melting point that allows it to flow smoothly.
• •SETS INSTANTLY: It helps prevent soldering failure due to moving parts while soldering because of the instant setting.

Main highlights

• •This lead-free soldering flux paste has excellent wetting properties and does not require cleaning after use
• •It is non-corrosive and non-conductive when dry
• •The product design includes a pushing-type mechanism for smoother flow and less waste during welding
• •The high activity rosin content aids in easy removal of oxide layers on the welding surface.
• •This soldering flux paste is suitable for use in PCB, SMD, SMT, handwork, phone, home appliance, and meter repairing application

Main highlights

• •AIM Nitroflux Kit with Solder Flux (2 oz.) and Brush is ideal for plumbing applications
• •Specifically designed for use on copper, brass, tin and lead
• •Creamy texture and viscosity allows it to hold form and stay in place while soldering.
• •Compatible with all lead-free and common soft solders
• •Follows the plumbing code requirements. NSF 61 certified and meets ASTM B-813.