MG Chemicals 419D-P, Overcoat Pen, Black/Clear/Green/White, 0.17oz Pen, Case of 5
MG Chemicals 419D-P, Overcoat Pen, Black/Clear/Green/White, 0.17oz Pen, Case of 5
MG Chemicals 419D-P overcoat pens apply an acrylic coating for localized solder-mask repair and conformal-coating touch-ups. The coating cures to a durable, flexible, smooth finish and can protect conductive pen traces. Choose black, clear, green or white. Each selected color is sold as a case of five pens, not an assorted-color pack; each pen contains 5 mL / 4.63 g net.
Best Uses / Applications
- Repairing scratches and chips in permanent solder masks.
- Touching up missed areas during conformal-coating application.
- Restoring local coating after replacement of an isolated component.
- Protecting conductive pen traces in qualified PCB repair and prototyping work.
Key Features
- Pen delivery for localized application rather than broad-area spraying.
- Functions as both solder resist and conformal coating, per the manufacturer.
- Manufacturer describes protection against solder drips, shorting, arcing, moisture, corrosion, fungus, dirt and static discharge.
- Removable with appropriate strippers or solder-through rework, per manufacturer guidance.
- Four carried color choices on this listing.
- TDS describes no hazardous air pollutants and a formulation free of toluene, xylene and MEK. These statements do not mean non-flammable or hazard-free.
Validate adhesion, coverage, cure and suitability for the actual assembly. Coating protection does not replace ESD-control procedures or finished-assembly qualification.
Color and Package Comparison
| Part number | Color | Net contents per pen | This listing's package |
|---|---|---|---|
| 419D-P-BK | Black | 5 mL / 4.63 g | 5 black pens |
| 419D-P-CL | Clear | 5 mL / 4.63 g | 5 clear pens |
| 419D-P-GR | Green | 5 mL / 4.63 g | 5 green pens |
| 419D-P-WH | White | 5 mL / 4.63 g | 5 white pens |
The title's 0.17 oz size refers approximately to fluid volume, not net weight. Net contents are not packaged shipping weights. Blue is not a selectable color on this listing or listed in the current pen TDS.
Pen-Specific Technical Specifications
| Binder | Acrylic |
|---|---|
| Dry to handle | 10 minutes, per current pen TDS |
| Minimum recoat time | 3 minutes |
| Recommended film thickness | 25–75 µm |
| Viscosity at 25°C | 100 cP |
| Density | 0.9 g/mL, per TDS |
| Solids | 30% |
| Theoretical coverage | Up to 570 cm² per pen at recommended thickness, calculated by manufacturer; actual results vary |
| Calculated VOC | 654 g/L |
| Room-temperature cure | 24 hours |
| Heat-cure option | Rest 10 minutes at room temperature, then 1 hour at 65°C |
| Chemical resistance | Poor, per pen TDS |
| Service temperature | -65 to 125°C |
| Shelf life | 5 years, per TDS |
| Storage | -5 to 27°C, dry and away from sunlight; cap and store tip-up after use |
Use the pen-specific cure schedule, not the liquid or aerosol schedule. The current pen TDS does not list the liquid/aerosol UL and IPC certifications, so those ratings are not assigned to this pen listing.
Application
Read the SDS for the selected color before use. Clean the substrate so it is free of oils, dust and other residues. Shake the pen vigorously until the ball moves freely. Hold it at an angle and depress the tip against the surface, then draw across the area while gently squeezing the barrel. Allow 10 minutes before handling or heat cure. Replace the cap and store tip-up after use. Confirm the assembly tolerates any selected heat-cure process.
Safe Handling
The reviewed safety sheets for all four colors identify highly flammable liquid and vapor, serious eye irritation, possible allergic skin reaction, and possible drowsiness or dizziness. Keep away from heat, sparks, flames and other ignition sources. Use with suitable ventilation, avoid breathing vapors and wear the protective gloves and eye protection specified by the applicable SDS. Keep containers closed and follow the full color-specific safety sheet.
Frequently Asked Questions
Is this an assorted-color case?
No. Select one color; the case contains five pens of that color.
Can it repair solder-mask damage?
Yes. The manufacturer lists repair of scratches and chips in permanent solder masks, as well as localized conformal-coating repairs.
How much does each pen contain?
Each pen has manufacturer-listed net contents of 5 mL / 4.63 g. This is not the packaged shipping weight.
Is it ready to handle in 15 minutes?
The current pen TDS specifies 10 minutes, replacing the older listing's 15-minute wording. Handling time is not full cure.
What is the full cure schedule?
Allow 24 hours at room temperature, or rest for 10 minutes and then heat cure for one hour at 65°C. Validate the assembly's heat tolerance.
Can I use the liquid 419D cure schedule?
No. Use the pen TDS and the selected color's SDS. Pen, bulk liquid and aerosol data are not interchangeable.
Is it chemically resistant?
The pen TDS rates chemical resistance as poor. Assess expected exposure rather than assuming a moisture-protective coating is chemically resistant.
Can it be removed for future rework?
The manufacturer describes removal with appropriate strippers or solder-through repair. Check current instructions and substrate compatibility before proceeding.
Technical and Color-Specific Safety Documents
419D-P Pen Technical Data Sheet
419D-P-BK Black Safety Data Sheet
419D-P-CL Clear Safety Data Sheet
419D-P-GR Green Safety Data Sheet
419D-P-WH White Safety Data Sheet
