MG Chemicals 419D-55ML Acrylic Conformal Coating, 2 oz. Bottle, Case of 5
MG Chemicals 419D-55ML Acrylic Conformal Coating, 2 oz. Bottle, Case of 5
MG Chemicals 419D-55ML is the liquid format of 419D, a one-part acrylic conformal coating for printed circuit boards. It forms a clear, flexible protective film and fluoresces under UV light to help inspect coverage. This listing is five 55 ml bottles per case. The liquid format suits qualified brush, spray or dip processes; do not transfer liquid viscosity or solids content to the aerosol version.
Best Uses / Applications
- PCB protection against moisture, condensation, dust and contamination.
- Electronics coating processes that need visible UV-fluorescent coverage inspection.
- Assembly protection where later localized repair or coating removal is important.
Key Features and Specifications
| Part number | 419D-55ML |
|---|---|
| Order format | Five 55 mL bottles per case |
| Binder | Acrylic; single-part |
| Appearance | Clear, amber cured coating; UV-A fluorescent |
| Liquid viscosity at 25°C | 115 cP |
| Liquid density | 0.9 g/mL |
| Solids | 30% |
| Recommended film thickness | 25–75 µm |
| Dry time to handle | 10 minutes for one coat; 20 minutes for two coats |
| Minimum recoat time | 3 minutes |
| Cure schedule | 24 hours at room temperature; alternatively allow 10 minutes at room temperature before oven curing at 65°C for 30 minutes, 80°C for 20 minutes, 100°C for 10 minutes, or 120°C for 5 minutes. Verify assembly heat tolerance. |
| Service temperature range | −65 to 125°C |
| Chemical resistance | Poor, per liquid TDS; not a chemical-resistant coating selection |
| Storage | −5 to 27°C; dry area away from sunlight; follow SDS |
| Manufacturer listed qualifications | IPC-CC-830B; UL 94 V-0, File E203094 |
| Bottle net volume | 55 mL / 1.86 fl oz |
| Bottle net weight | 50.6 g / 1.78 oz |
MG describes the coating as free of toluene, xylene, ozone-depleting compounds and hazardous air pollutants. Those statements do not mean nonflammable, harmless or ventilation-free. Follow the current SDS. The manufacturer also lists selective robotic-coating use; validate the actual equipment settings and assembly.
Selection Comparison
| 55 mL liquid bottle | Smaller-volume work and brush application after process qualification. |
|---|---|
| 419D-1L liquid can (945 mL net) | Larger-volume liquid coating processes. |
| Aerosol version | Different delivery format and published liquid properties; follow its own TDS. |
Frequently Asked Questions
Is dry-to-handle the same as full cure?
No. The stated 10- or 20-minute handling values are not permission to load or expose a fully cured assembly. Follow the current liquid TDS and validated process for cure conditions.
Can it be inspected under UV light?
Yes. Its fluorescence helps locate coverage; it does not by itself prove the required thickness or complete process qualification.
Can I use the aerosol data for this liquid?
No. For example, the manufacturer lists different viscosity and solids values for liquid and aerosol formats.
Can 419D be removed for rework?
MG identifies 435 thinner, 8309 and 8310A removers for rework. Check substrate and component compatibility and the current instructions before use.
Does this replace ESD handling controls?
No. A coating’s protective properties do not replace qualified personnel grounding, packaging or other required ESD controls.
How do I apply it?
Select and validate brush, spray or dip application for the assembly. Mask keep-out areas, use compatible thinning only when specified, and follow the product safety data sheet.
Technical and Safety Documents
The SDS identifies this as a highly flammable liquid and vapour that causes serious eye irritation and may cause drowsiness or dizziness. Follow the complete SDS for ventilation, ignition-source controls, protective equipment, storage and handling.
