Flux Remover

Flux Remover

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Flux Remover

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Clean Off Flux Contamination & White Residues to Improve Reliability of Electronics

Flux removers (defluxers) remove flux residues and other contaminants left by manufacture, rework, or repair of printed circuit boards. Residues from higher, lead-free temperatures are harder to clean. PWR-4, G3, E-LINE and Precision-V flux removers have been proven very effective at removing fluxes baked on at lead-free temperatures.

Micro-components and fine pitch leads are delicate and easily damaged, so brushing and scrubbing should be avoided if possible. The G3, E-LINE and Precision-V products have a powerful spray and strong solvent that blasts off residues and cleans areas under components that a brush cannot touch.

Techspray offers traditional solvent-based cleaners and cutting-edge water-based technologies marketed under the Techspray Renew brand. For more information, check out our A Thorough Comparison of Water Based Cleaners and Solvent Cleaners.

Techspray Renew branded cleaners are innovative solutions that combine the best of current “green” technologies to make the most powerful eco-friendly cleaners on the market.

All Techspray flux removers have the following advantages:

  • Help create bright, shiny solder joints
  • Improve PCB reliability
  • Prevent conformal coating defects
  • Prevent corrosion from contamination
  • RoHS compliant
Looking for 3M Novec Replacements, check out our Novec replacements page.

Click here for Flux Remover selection guide

Click here for Vapor Degreaser selection guide

PWR-4 Flux Remover PWR-4 Flux Remover
Powerful, non-flammable, cost effective flux removal -- safer nPB replacement
G3 Flux Remover G3 Flux Remover
Strong, fast-acting & nonflammable flux remover
G3 No-Clean Flux Remover G3 No-Clean Flux Remover
Strong, fast-acting & nonflammable no-clean flux remover spray
G3 Universal Cleaner G3 Universal Cleaner
Nonflammable & powerful liquid cleaner
E-Line Flux Remover E-Line Flux Remover
Powerful & economical flux remover
E-Line Flux Remover & Maintenance Cleaner E-Line Flux Remover & Maintainance Cleaner
Powerful & economical liquid cleaner
E-Line IPA E-Line IPA
99+% IPA in convenient aerosol package
Precision-V Flux Remover & Maintenance Cleaner Precision-V Universal Cleaner
Nonflammable & powerful precision cleaner
Precision-V Solvent 371DA Replacement for 3M Novec 71DA
Replacement for 3M Novec 71DA
Precision-V Solvent 371DE Replacement for 3M Novec 71DE
Replacement for 3M Novec 71DE
Precision-V Solvent 371IPA 	Replacement for 3M Novec 71IPA
Replacement for 3M Novec 71IPA
Precision-V Solvent 3720 	3m novec 7200 replacement
Replacement for 3M Novec 7200
Precision-V Solvent 372DA Replacement for 3M Novec 72DA
Replacement for 3M Novec 72DA
Precision-V Solvent 372DE 	Replacement for 3M Novec 72DE
Replacement for 3M Novec 72DE
Precision-V Solvent 3730 Novec 3700 Replacement
Replacement for 3M Novec 7300
Precision-V Solvent 373DE 	Replacement for 3M Novec 73DE
Replacement for 3M Novec 73DE
Precision-V Solvent 3810 Precision-V 3810 Solvent replacement for 3M Novec 7100, 7200 and 7300
Plastic-safe rinsing & heat transfer fluid
Precision-V Solvent 3820
Powerful, nonflammable high precision cleaner for vapor degreasing
Eco-dFluxer SMT100 Eco-dFluxer SMT100
Inline & batch water-based flux remover
Eco-dFluxer SMT200 	Eco-dFluxer SMT200
Inline & batch water-based flux remover for sensitive metals
Ethyl Alcohol (Ethanol) Wipes 1606-30pk
Pre-saturated wipes with ethanol for fast evaporation
Isopropyl Alcohol (IPA) Wipes - 70% 70% isopropyl alcohol
Pre-saturated wipes with 70% pure isopropyl alcohol
Isopropyl Alcohol (IPA) Wipes - 99.8% Isopropyl Alcohol (IPA) Wipes - 99.8%
Pre-saturated alcohol wipes with 99.8% pure isopropyl alcohol
PWR-4 Solvent 3910 PWR-4 Solvent 3910
100% US Made, Heavy-duty, Low GWP degreaser, PFAS FREE


What is a flux remover?
A flux remover, also known as a flux cleaner or solder flux remover, is a chemical cleaning agent used in electronics and soldering applications to remove flux residues from circuit boards, electronic components, and other soldered connections.

Flux is a substance used during soldering to facilitate the flow of molten solder and promote good solder joints. It prevents oxidation of the metal surfaces, enhances wetting, and ensures a reliable electrical connection. However, after soldering, some flux residues may remain on the surface, which can be detrimental if left uncleaned. Flux residues can be conductive and corrosive, potentially causing short circuits, reduced performance, or even long-term damage to the electronic components.

A flux remover is designed to effectively remove these flux residues without causing harm to the electronic components or the circuit board. It typically comes in the form of a spray, liquid, or solvent, and it contains specific chemicals that dissolve and remove the flux residues.

Flux removers vary in their composition, and some may be suitable for cleaning specific types of flux or for different materials. It's essential to choose the right flux remover for the type of flux used in the soldering process and follow the instructions and safety precautions listed in the safety data sheet (SDS).

Proper cleaning of flux residues with a flux remover is crucial for maintaining the reliability and functionality of electronic devices, especially in the manufacturing and repair industries. It helps ensure that soldered connections are clean, free of contamination, and function as intended.

For more information, check out "5 Best Practices for Cleaning High Reliability PCBs"
How do I remove flux from a printer circuit board (PCB)?
The cleaning method best for your operation depends on your volume, throughput desired, criticality of the electronics, regulatory restrictions, floor space and other practical considerations. All defluxing processes basically involve 1) dissolving the flux residue, 2) flushing off the dissolved residue, and 3) drying the printed circuit board assembly (PCBA). The following are the general methods used to clean PCBAs:
  • Manual cleaning - This can involve aerosol or pump sprays, or solvents in a pan or tray. Agitation can be applied with a brush, swab or wipe. This method is best for low volume cleaning of non-critical electronics (e.g. IPC class 1), because it is operator dependant, so not easily repeatable.
  • Ultrasonic - This method uses sonic (sound) waves to create bubbles, which implode on the PCBA surface to break up the flux residues. This is an aggressive cleaning method, which can be a problem for sensitive components (e.g. ceramic). Because the dissolved flux residues flow back into the cleaning solution, the cleaner needs to be monitored and changed often to prevent cross-contamination.
  • Vapor degreasing - The cleaning is done either in the vapor phase of a solvent, or submerged in a sump, which often includes ultrasonic action. Since the final rinse always happens in the vapor phase, this is an ideal cleaning method for critical applications where residue cannot be accepted.
  • Batch or inline systems - Spray equipment is used to wash, rinse, and dry the PCBAs. Water or water-based cleaners are most commonly used as the cleaning solution. This cleaning method is good for high volume cleaning, and is repeatable enough for critical applicaitons.
Click here for a how-to video on PCB cleaning.
When should I clean off no-clean flux when soldering?
If it is not fully activated (brought up to solder temperature), you should not leave any ionic residue behind. You might have to clean if...
1. Flux is being used so liberally that it all isn’t being heated along with the solder.

2. The non-ionic residue can impede with the function of the devise either short-term or long-term.


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