Chemtronics 10-25L, Chem-Wik Rosin Flux Desoldering Wick, Blue, 25' / 7.5m L Spool
Chemtronics 10-25L Chem-Wik Rosin Flux Desoldering Wick — Size #4 Blue, 2.8mm, 25ft Spool
Chemtronics Chem-Wik is a professional-grade rosin flux desoldering wick engineered for fast, clean solder removal from PCBs and electronic assemblies. The 10-25L is the Size #4 Blue wick — 2.8mm wide and 25 feet long — ideal for removing solder from large pads, through-hole joints, and heavily tinned areas. Made from ultra-pure, oxygen-free copper braid coated with high-purity Type R rosin flux, Chem-Wik delivers fast capillary wicking action that pulls solder away quickly while minimizing heat exposure to sensitive components.
All Chem-Wik wick is sealed in nitrogen-purged packaging to prevent corrosion and preserve performance before first use.
Key Specifications
| Specification | Value |
|---|---|
| Part Number | 10-25L |
| Wick Size | #4 Blue |
| Width | 2.8mm (0.110") |
| Length | 25 ft / 7.5m |
| Format | Single spool |
| Flux Type | Type R Rosin (ROL0) |
| Halide Free | Yes |
| Braid Material | Ultra-pure oxygen-free copper |
| Packaging | Nitrogen-purged sealed spool |
| Standards | MIL-F-14256F Type R, ANSI/IPC J-STD-004 ROL0, NASA STD-8739.3, DOD-STD-883E Method 2022 |
Key Features
- Size #4 Blue — 2.8mm wide — optimized for large pads, through-hole joints, and heavy solder deposits
- Ultra-pure oxygen-free copper braid — maximizes thermal conductivity and wicking speed
- Type R rosin flux coating — high-purity, noncorrosive, halide-free flux activates quickly for efficient solder pickup
- Optimized weave design — faster wicking and heat transfer vs. standard braids
- Little to no post-solder cleaning required — no corrosive residues left behind
- Nitrogen-purged packaging — prevents oxidation and preserves flux activity before use
- MIL-spec and IPC qualified — meets MIL-F-14256F Type R, IPC J-STD-004 ROL0, NASA STD-8739.3
- ESD-safe bobbin format available — 5ft spool versions packaged in static dissipative bobbins
Ideal Applications
- Removing excess solder from large PCB pads and through-hole component leads
- Desoldering connectors, headers, and large SMD pads
- Rework and repair of heavily tinned areas on circuit boards
- Military, aerospace, and high-reliability electronics assembly and repair
- Production rework lines requiring fast, clean solder removal
Chemtronics Chem-Wik Rosin — Full SKU Lineup
| Part Number | Size # | Width | Length | Format | Best For |
|---|---|---|---|---|---|
| 2-25L | #2 Yellow | 0.8mm | 25ft | Spool | Fine-pitch SMD, small pads |
| 2-50L | #2 Yellow | 0.8mm | 50ft | Spool | Fine-pitch, higher volume |
| 2-5L | #2 Yellow | 0.8mm | 5ft × 25 | Bobbins/Case | ESD-safe bench use, small pads |
| 5-100L | #3 Green | 1.5mm | 100ft | Spool | Medium pads, general rework |
| 7-25L | #3 Green | 2.0mm | 25ft | Spool | Medium-large pads |
| 7-50L | #3 Green | 2.0mm | 50ft | Spool | Medium-large pads, higher volume |
| 10-25L | #4 Blue | 2.8mm | 25ft | Spool | Large pads, through-hole, heavy deposits |
| 10-100L | #4 Blue | 2.8mm | 100ft | Spool | Large pads, production volume |
| 10-500L | #4 Blue | 2.8mm | 500ft | Spool | Large pads, high-volume production |
| 10-5L | #4 Blue | 2.8mm | 5ft × 25 | Bobbins/Case | ESD-safe bench use, large pads |
Frequently Asked Questions
What does "rosin flux" mean in Chemtronics Chem-Wik solder wick?
Rosin flux is a natural, noncorrosive flux derived from pine resin. In Chem-Wik, the copper braid is pre-coated with ultra-high-purity Type R rosin (ROL0 per IPC J-STD-004), which activates when heated to help the braid wet and draw solder away from pads quickly. Rosin flux leaves minimal residue and generally does not require post-cleaning in most applications.
What size solder wick do I need for large pads?
For large pads, through-hole leads, and heavy solder deposits, Size #4 Blue (2.8mm) is the recommended choice — that's the Chemtronics 10-25L. For medium pads, use Size #3 Green (2.0mm). For fine-pitch SMD work, use Size #2 Yellow (0.8mm).
Is Chemtronics Chem-Wik halide free?
Yes — Chem-Wik Rosin is halide free and meets IPC J-STD-004 ROL0 classification, making it suitable for military, aerospace, and high-reliability electronics applications where halide contamination must be avoided.
Does Chem-Wik rosin wick require flux to work?
No additional flux is required in most cases — Chem-Wik is pre-coated with rosin flux. However, adding a small amount of additional liquid flux to the wick before use can speed up wicking action, especially on oxidized or cold joints.
What military and aerospace standards does Chemtronics Chem-Wik meet?
Chem-Wik Rosin meets MIL-F-14256F Type R, NASA STD-8739.3 Soldered Electrical Connections, ANSI/IPC J-STD-004 ROL0, and DOD-STD-883E Method 2022 — making it qualified for defense, aerospace, and high-reliability electronics assembly and rework.
Why is my solder wick not picking up solder?
Common causes include insufficient iron temperature (try 650–750°F / 343–399°C), oxidized wick (use fresh wick or add flux), iron tip not making full contact with both the wick and pad, or expired/moisture-contaminated wick. Nitrogen-purged packaging on Chem-Wik helps prevent the last issue — always reseal unused wick.
Technical Data Sheet and Safety Data Sheet available upon request — contact MTE Solutions for CDN-hosted documents.
