MG Chemicals 419D-340G Acrylic Conformal Coating, 14 oz. Aerosol, Case of 12
MG Chemicals 419D-340G Acrylic Conformal Coating, 14 oz. Aerosol, Case of 12
MG Chemicals 419D-340G is a one-part acrylic conformal coating in an aerosol format for PCB moisture protection, repair and touch-up work. It cures to a durable, flexible, smooth clear/amber finish and fluoresces under UV-A light to assist inspection. This listing contains 12 aerosols, each with manufacturer-listed net contents of 340 g / 410 mL.
Size clarification: The existing title uses “14 oz.” Use the manufacturer's 340 g net weight and 410 mL net volume when comparing products; 14 oz and 340 g are not equivalent weights. Net contents are not packaged shipping weights.
Best Uses / Applications
- PCB conformal coating for moisture and humidity protection.
- Electronics assembly protection in qualified industrial and commercial applications.
- Repair, touch-up and smaller-volume aerosol coating processes.
- UV-A-assisted inspection of coating coverage.
The manufacturer also describes protection against corrosion, fungus, dirt, dust, thermal shock, short circuits, high-voltage arcing and static discharge. Actual results depend on preparation, coverage, thickness and cure. Conformal coating does not replace ESD handling controls or establish finished-assembly qualification.
Key Features
- Single-part acrylic binder with aerosol delivery.
- UV-A fluorescence for inspection assistance.
- Typical handling time of 10 minutes for one coat, 20 minutes for two coats.
- Manufacturer-listed UL 94 V-0, file E203094, and IPC-CC-830B certification.
- Xylene- and toluene-free formulation, per aerosol TDS.
- Reworkable by suitable stripping or solder-through repair, following manufacturer guidance.
Aerosol-Specific Specifications
| Part number | 419D-340G |
|---|---|
| Net contents per can | 410 mL / 340 g |
| Order quantity | Case of 12 aerosols |
| Binder / cured color | Acrylic / clear, amber |
| Viscosity at 25°C | 40 cP |
| Solids content | 13% |
| Density | 0.9 g/mL, per aerosol TDS |
| Recommended film thickness | 25–75 µm |
| Minimum recoat time | 3 minutes |
| Dry to handle | 10 minutes, one coat; 20 minutes, two coats |
| Room-temperature cure | 24 hours |
| Theoretical coverage | 5,700 cm² at the recommended thickness, per TDS; actual coverage varies |
| Calculated VOC | 794 g/L |
| Chemical resistance | Poor, per TDS |
| Service temperature | -65 to 125°C |
| Shelf life | 5 years, per TDS |
| Storage | -5 to 27°C, dry and away from sunlight |
Aerosol vs. Liquid Format
| Consideration | 419D aerosol | 419D liquid |
|---|---|---|
| Delivery | Ready-to-spray aerosol can | Qualified brush, dip or spray-equipment process |
| Published viscosity | 40 cP | 115 cP |
| Published solids | 13% | 30% |
| Documents | Use aerosol TDS and SDS | Use liquid TDS and SDS |
Do not transfer liquid application settings or coverage figures to the aerosol. Pen products also require their own documentation.
Application and Cure
Read the aerosol SDS before use. Clean the substrate of oils, dust and other residues. Shake the can vigorously and test the spray pattern. The TDS recommends tilting the board at 45° and spraying thin, even coats from 20–25 cm away using moving spray-and-release strokes that begin and end off the board. Wait at least 3 minutes between coats and rotate the board 90° to improve coverage. After use, the TDS directs briefly inverting the can to clear the nozzle until clear propellant appears.
For cure, allow 24 hours at room temperature. The TDS cure section specifies a 10-minute room-temperature rest before these heat-cure options: 30 minutes at 65°C, 20 minutes at 80°C, 10 minutes at 100°C or 5 minutes at 120°C. Its application page gives a shorter 3-minute pre-heat wait; follow the longer 10-minute rest pending manufacturer clarification. Verify the assembly's heat tolerance. Dry-to-handle is not full cure.
Safety
The October 2026 aerosol SDS classifies 419D as a flammable aerosol and warns that the pressurized container may burst if heated. It causes serious eye irritation and may cause drowsiness or dizziness. Keep away from ignition sources, use outdoors or in a well-ventilated area, avoid breathing spray or vapors and wear the protective equipment specified in the SDS. Do not pierce or burn the can. Protect from sunlight and temperatures above 50°C (122°F). A cured coating's flame rating does not make the uncured aerosol non-flammable.
Frequently Asked Questions
How much coating is included?
This listing is a case of 12 aerosols, each with 340 g / 410 mL net contents.
Does it provide excellent chemical resistance?
No. The current aerosol TDS rates chemical resistance as poor. Evaluate chemical exposure separately from its moisture-barrier properties.
Is it UV fluorescent?
Yes, under UV-A light. Fluorescence helps locate coverage but does not alone prove correct thickness, cure or complete protection.
Can it be removed for rework?
The manufacturer describes removal with appropriate strippers or solder-through repair. Confirm current remover instructions and substrate compatibility before use.
What coverage should I expect?
The aerosol TDS lists theoretical coverage of 5,700 cm² at its recommended thickness. Overspray, geometry, technique and number of coats affect actual coverage.
Which standards are supported by the current TDS?
The aerosol TDS lists UL 94 V-0, file E203094, and IPC-CC-830B. This listing does not claim MIL-I-46058C qualification; obtain specific manufacturer evidence if your application requires it. These coating ratings do not certify the finished assembly.
Is 419D proven better than 419C?
No comparative performance claim is made here. Select using the exact current product specifications and your process requirements rather than the previous unsupported comparison.
Is RoHS documentation available?
The manufacturer's product page provides a RoHS document option. Obtain the applicable declaration for your purchasing requirements rather than treating a safety sheet as a substitute for that declaration.
Manufacturer Video
This family video is linked from MG Chemicals' 419D page. Follow the aerosol-specific instructions for this listing.
Technical and Safety Documents
419D Aerosol Technical Data Sheet
419D Aerosol Safety Data Sheet, version 4.04
