Electronics Cleaning Chemicals: Flux Removers, Degreasers & Conformal Coating Removers

Why Electronics Cleaning Matters

Flux residues, oils, particulates, and contaminants left on PCBs and assemblies can cause electrochemical migration, corrosion, reduced insulation resistance, and field failures. Proper cleaning is critical for high-reliability electronics, conformal coating adhesion, and compliance with IPC cleanliness standards.

Choosing the right cleaning chemical depends on the flux chemistry used, the cleaning method (inline, batch, ultrasonic, or manual), and the cleanliness standard required.

Types of Electronics Cleaning Chemicals

Flux Removers

Designed to dissolve and remove solder flux residues from PCBs after soldering. Flux remover selection must match the flux chemistry:

  • Rosin/RMA flux removers — Solvent-based formulations effective on rosin and resin flux residues. Typically IPA-based or proprietary solvent blends.
  • No-clean flux removers — Stronger formulations required to remove the harder, more chemically resistant residues left by no-clean fluxes.
  • Water-soluble flux removers — DI water is the primary cleaning agent; saponifiers may be added for enhanced cleaning.

Degreasers

Remove oils, fingerprints, mold release agents, and general contamination from PCBs, stencils, and metal parts. Available as aerosols, liquid concentrates, and wipes. Common chemistries include IPA, nPB alternatives, and HFE-based solvents.

Stencil Cleaners

Formulated to remove solder paste from SMT stencils quickly without damaging the stencil or frame. Available as spray aerosols for manual cleaning and bulk liquids for stencil cleaning machines. Must be compatible with the paste chemistry (no-clean vs. water-soluble).

Conformal Coating Removers

Used to strip acrylic, urethane, epoxy, or silicone conformal coatings for rework and repair. Coating remover selection must match the coating type — acrylic coatings are easiest to remove; epoxy and silicone require more aggressive chemistries or mechanical removal.

Contact Cleaners

Fast-drying solvents for cleaning electrical contacts, connectors, switches, and relays. Leave no residue and are safe for most plastics and elastomers.

ESD-Safe Cleaners

Formulated to clean ESD mats, workstation surfaces, and flooring without leaving static-generating residues. See our anti-static coatings guide for ESD floor care and mat cleaning products.

Cleaning Methods

  • Aerosol spray — Convenient for spot cleaning, rework, and low-volume applications.
  • Inline aqueous cleaning — High-throughput batch cleaning using water-based chemistry in a conveyor system. Best for water-soluble flux processes.
  • Ultrasonic cleaning — Uses cavitation to remove stubborn residues. Effective for complex geometries and through-hole assemblies.
  • Manual wipe-down — Using presaturated wipes or swabs with cleaning solvent. Common for rework, inspection, and stencil maintenance.

Cleanliness Standards

  • IPC-7711/7721 — Rework and repair of electronic assemblies, including cleaning requirements.
  • IPC-CH-65B — Guidelines for cleaning of printed boards and assemblies.
  • MIL-PRF-680 — Military specification for degreasing solvent.
  • ROSE testing (IPC-TM-650) — Resistivity of solvent extract test for ionic contamination measurement.

Selecting the Right Cleaning Chemical

  • Match the cleaner to your flux chemistry (rosin, no-clean, water-soluble).
  • Consider your cleaning method (aerosol, inline, ultrasonic, manual).
  • Verify material compatibility with your PCB substrate, components, and stencil materials.
  • Check VOC content and local regulatory requirements for solvent use.
  • For conformal coating removal, identify the coating type before selecting a remover.

Shop electronics cleaning chemicals at KEM-TRON from ACL Staticide and other leading manufacturers, including flux removers, degreasers, stencil cleaners, and contact cleaners.