10 Best solder fluxes of 2025

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Best Choice

1

IMPRESA
IMPRESA Liquid Zinc Flux for Stained Glass Supplies & Soldering - 8oz Bottle - Water-Soluble Formula for Easy Cleanup & Includes Applicator Brush - Compatible with Copper, Zinc & Lead Foil

19% Off
Main highlights

Water-Soluble for Easy Cleanup
This all-purpose flux is completely water-soluble, making cleanup quick and easy. It includes an application brush and is made in the USA.

Ideal for Stained Glass Projects
Perfect for use with zinc, lead, and copper foil in stained glass projects. It works well on small pieces and is less messy than paste.

Ease of Use and Application
Customers praise its easy application and cleanup, noting that it dries fast and is less greasy than paste flux. A little goes a long way.
9.8

Exceptional

Our Rating

9.9
Durability

9.3
Simple to clean

9.1
worth the money
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Value for Money

2

MG Chemicals
MG Chemicals - 8341-10ML 8341 No Clean Flux Paste, 10 milliliters Pneumatic Dispenser (Complete with Plunger & Dispensing Tip)
Main highlights

Superior Fluxing Ability
Superior fluxing ability, instant wetting, non-corrosive residue, compatible with lead-free and leaded solder systems, RoHS compliant, thixotropic paste.

Ideal for Electronics Projects
Perfect for electronics projects, complex circuits, Game Boy screen replacements, car repairs, and professional electronic assembly tasks.

Easy Application and Cleanup
Customers praise its easy application, precise needle tip, minimal fume emissions, and no-clean feature, though some recommend cleaning with isopropyl alcohol.
9.5

Excellent

Our Rating

9.7
Simple to use

9.3
Simple to clean

8.9
Attachment
3

Essmetuin

Essmetuin No Clean Soldering Flux Paste(4Pack), Solder Flux For Electronics Soldering, Tin soldering, Lead-Free Rosin Soldering Flux For Circuit Boards and Copper Electrical Wire
9.2

Excellent

Our Rating

9.7
Simple to use

9.7
Easy to use

9.5
worth the money
4

QUIMTECH

Liquid Solder Flux Dropper (30 ml/1 Oz.) I RMA Liquid Solder Flux I Soldering Flux I Electrical Solder I No Clean Liquid Flux I Rosin Flux I Soldering Flux for Electronics I Lead Free Liquid Solder I
9.1

Excellent

Our Rating

9.3
Simple to use

9.1
worth the money

8.0
Simple to clean
5

SRA Soldering Products
SRA Solder 135 Rosin Paste Soldering Flux For Electronics, No Clean Flux Made for Lead and Lead-Free Solder Circuit Boards and Copper Electrical Wire - Safe Clean Residues with No Goopy Mess (2oz Jar)

22% Off
Main highlights

Superior Solder Flux Performance
Achieve the soldering results you desire with SRA 135. Our rosin paste flux is impurity-free with superior solder flux paste wetting performance.

Ideal for DIY Electronics Projects
Perfect for soldering car audio, stereo & hifi, computers, RC vehicles, drones, musical instruments, gaming consoles, model railroads, Arduino/Raspberry Pi, etc.

Highly Effective and Long-Lasting
Customers appreciate its ability to clean up solder immediately, making soldering breeze-easy and lasting a long time, even with frequent use.
9.0

Excellent

Our Rating

9.5
worth the money

9.5
Simple to use

9.5
Simple to clean
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6

Romeda
2 Jar Solder Flux, Flux for Soldering, Rosin Soldering Flux Paste for Lead-Free Electronics Soldering and Soldering DIY (1.2oz/35g in a Jar)
Main highlights

ENOUGH QUANTITY FOR USE
The package includes 2 jars of soldering flux, totaling 70 g, ensuring ample supply for various soldering tasks.

IDEAL FOR ELECTRONIC WELDING
Flux is suitable for welding instruments, gold, copper, tin, iron, and other metals; perfect for electronic welding, repair, and rework.

EASY TO USE AND EFFECTIVE
Customers appreciate its ease of use and effectiveness, making it a great value for achieving clean and successful solder joints.
Key specs
- package dimensions:4.96 x 2.5 x 1.02 inches
- material:lead, iron, gold, tin, carbon
- included components:2 jars of soldering flux
- size:N/A
- color:N/A
8.9

Very Good

Our Rating

9.5
worth the money

9.5
Simple to use

9.5
Simple to take off
7

Essmetuin

Desoldering Wick and Soldering Flux Paste for Electronics Repair, No Clean Flux(10CC), Solder Removal Kit
8.8

Very Good

Our Rating
8

Rectorseal
Rectorseal 14000 1.7-Ounce Nokorode Regular Paste Flux
Main highlights

Time_and_Money_Saving_Feature
Cleans and fluxes in one operation saving time and money. Special oil base protects the solder joint against corrosive attack.

Ideal_Use_for_Plumbing_and_Stained_Glass
Its non-aggressive formula is ideal when used on copper and brass fittings. Lead free and acid free-safe to use on potable water systems.

Smooth_Solder_Flow_Praised_by_Customers
Runs a nice smooth solder line. It also washes off easily with soap, no need for a flux remover. Customers appreciate its ease of use.
Key specs
- package dimensions:2.2 x 2.2 x 1.8 inches
- material:brass
- included components:Rectorseal 14000 1.7-Ounce Nokorode Regular Paste Flux
- size:1.7 Oz
- color:Original Version
8.7

Very Good

Our Rating

9.7
worth the money

9.5
materials Quality

9.3
Simple to use
9

BEEYUIHF

BEEYUIHF Rosin Solder Flux Paste, Flux for Soldering for SMD BGA LED PCB IC CPU electronic repair & soldering (1.76oz/50g)
8.6

Very Good

Our Rating
10

twocorn

Twocorn 63/37 Solder Wire, high Purity no-wash tin-Lead Rosin cored Wire with 1.8% Flux for Electric Soldering (0.8mm 50g)

20% Off
8.5

Good

Our Rating