EF-28LQ Alcohol-Resin Liquid Flux
DKL EF-28LQ Alcohol-Resin Liquid Flux is a high-performance, specially formulated liquid flux engineered for precision soft soldering across tinned and clean copper surfaces. Ideal for electrical and electronic assemblies, it delivers superior wetting properties while leaving behind completely non-corrosive, no-clean residues.
High-Fluidity Coverage
Liquid formulation ensures fast surface wetting and excellent capillary action across dense electrical components.
Dual-Alloy Compatibility
Works seamlessly with standard tin/lead alloys (Sn60/Pb40) as well as premium lead-free lines like licensed SN100C.
Resin-Based Protection
Upon cooling, residues cure into a hard, stable, non-corrosive barrier that safely eliminates the need for post-solder washing.
Technical Specifications
| Parameter | Specification Detail |
|---|---|
| Solids Content | 40% |
| Specific Gravity | 0.983 g/cm³ |
| Acid Value | 130 |
| Flash Point | 10°C (Flammable) |
| Alloy Compatibility | Leaded (Sn60/Pb40, Sn40/Pb60) Lead-Free (SN100C / Tin-Copper) |
| Quality Systems | ISO 9001:2015 ISO 14001:2015 |
Standard Packing Options & Formats
- Small Batch Rework: 500ml Bench Containers
- Standard Production: 1-Litre Sealed Bottles
- High-Volume Industrial: 5-Litre Bulk Drums
- Large custom volumes available to special order.
Application & Process Guidelines
DKL EF-28LQ should be applied by brush or by dipping the components directly, with soldering carried out immediately afterward. It integrates perfectly alongside traditional 60/40 Leaded Solder benchmarks and premium lead-free SN100C lines. Heat should be applied using conventional soldering irons, induction systems, or via alloy basting for thick cables. Avoid direct heating with an open flame to preserve flux properties and prevent flash ignition.
Frequently Asked Questions
Can EF-28LQ be used for both hand soldering and dipping lines? +
Yes. EF-28LQ is highly versatile and engineered for multiple application methods. It can be applied directly by brush for precise rework and hand soldering, or used as a dipping flux for component tinning and heavy-duty industrial wire dip lines.
How does a 40% solids content affect post-solder residues? +
With a high 40% solids content, EF-28LQ provides exceptionally robust thermal protection and sustained wetting action for heavy joints. Upon cooling, it leaves a distinct, hard resin film. While thicker than low-solids “no-clean” wave fluxes, this residue is entirely non-corrosive, non-conductive, and safe to leave on the assembly without washing.
Is EF-28LQ compatible with high-temperature lead-free SN100C setups? +
Absolutely. The alcohol-resin base is specifically formulated to withstand the elevated processing temperatures required for lead-free alloys. It prevents rapid heat degradation and guarantees excellent capillary spreading across both traditional 63/37 leaded lines and premium lead-free SN100C or tin-copper alloy setups.
What extraction requirements are needed for an alcohol-based flux? +
Because EF-28LQ uses a high-purity alcohol solvent base with a low 10°C flash point, it releases flammable vapours at room temperature. For plant safety and operator health, it must be handled away from open flames/sparks, and used with local exhaust ventilation or a dedicated fume extraction hood to clear workplace emissions.