MG Chemicals 419E-1L, Premium Acrylic Conformal Coating, 1L Can, Case of 6
MG Chemicals 419E-1L, Premium Acrylic Conformal Coating, 1L Can, Case of 6
MG Chemicals 419E-1L is a one-part acrylic conformal coating for protecting printed circuit boards in humid environments. It cures to a clear, flexible, smooth finish and fluoresces under UV-A light for coating inspection. This listing is a case of six cans, each containing 945 mL with a net weight of 830 g; the 1L designation is the catalog size, not the net fill.
Best Uses / Applications
Use 419E liquid for PCB coating in electronics manufacturing, maintenance, rework and repair where moisture protection and access for later servicing are important. It supports brush touch-ups, dip coating, manual spray equipment and selective coating equipment. MG Chemicals provides example settings for PVA and Nordson ASYMTEK systems; validate the coating process on your assembly rather than treating those settings as universal.
Key Features
- One-part acrylic coating; no mixing of resin and hardener.
- Moisture barrier with protection against corrosion, fungus, dirt, dust, thermal shock, short circuits, high-voltage arcing and static discharge, as described by MG Chemicals.
- Clear, flexible finish with UV-A fluorescence for inspection.
- MG Chemicals lists UL 746E certification, File E203094, and IPC-CC-830C certification.
- Xylene- and toluene-free formulation, as specified in the liquid TDS.
- Can be removed with appropriate coating strippers or soldered through for rework.
Technical Specifications
| Specification | Detail |
|---|---|
| SKU / packaging | 419E-1L; case of 6 cans |
| Net contents per can | 945 mL; 830 g / 1.83 lb |
| Binder / components | Acrylic; one part |
| Cured color | Clear |
| Inspection | Fluoresces under UV-A light |
| Dry time to handle | 15 minutes, one coat; 25 minutes, two coats |
| Minimum recoat time | 3 minutes |
| Recommended film thickness | 25–75 µm |
| Density | 0.9 g/mL |
| Viscosity at 25°C | 160 cP |
| Solids | 29% |
| Calculated VOC | 625 g/L |
| Theoretical coverage at recommended thickness | 93,176 cm²/L; actual coverage depends on process and losses |
| Room-temperature cure | 24 hours |
| Heat-cure options | After a 15-minute room-temperature rest: 30 minutes at 65°C, 15 minutes at 80°C, or 5 minutes at 100°C |
| Service temperature range | −65 to 130°C |
| Volume resistivity | 3.5 × 10¹³ Ω·cm |
| Breakdown voltage | >1,500 V |
| Dielectric strength | 1,100 V/mil |
| Glass transition temperature | 38°C |
| CTE below glass transition | 160 ppm/°C |
| Manufacturer-listed certifications | UL 746E, File E203094; IPC-CC-830C |
| Shelf life / storage | 5 years; store between −5 and 27°C in a dry area away from sunlight, following the SDS |
| Recommended application thinner | MG Chemicals 4352 Thinner 2 |
Application and Cure Guidance
Clean the PCB to remove oils, dust and residues before coating; the TDS recommends MG 824 99.9% isopropyl alcohol. Brush application generally does not require thinning. For manual spray guns, the TDS gives a starting dilution of one part coating to one part 4352 thinner, with adjustment as required. Use thin, even coats, allow at least three minutes between coats, and follow the application-specific instructions in the hosted TDS.
Handling time is not full cure. For general heat-cure planning, allow a 15-minute room-temperature rest before using one of the listed oven cycles. Validate component and substrate temperature limits before applying heat.
419E Packaging Comparison
| Catalog size | Manufacturer net contents | Selection consideration |
|---|---|---|
| 419E-1L, this listing | 945 mL / 830 g per can; MTE case of 6 | Liquid coating for smaller batches, touch-ups or controlled dispensing |
| 419E-4L | 3.78 L / 3.32 kg per can | Larger liquid coating requirements |
| 419E-20L | 18.9 L / approximately 16.6 kg per pail | Higher-volume liquid processes |
| 419E-340G aerosol | Separate spray format | Use aerosol-specific TDS and SDS; liquid viscosity and application instructions do not automatically apply |
Frequently Asked Questions
Does each 419E-1L can contain a full liter?
No. MG Chemicals specifies 945 mL and 830 g per can. This listing is sold as a case of six cans.
How long does it take to cure?
The liquid TDS specifies 24 hours at room temperature. Alternatively, after a 15-minute rest, use 30 minutes at 65°C, 15 minutes at 80°C or 5 minutes at 100°C. One-coat handling time is 15 minutes, not full cure.
Can I inspect the coating with UV light?
Yes. 419E fluoresces under UV-A light to support coating-coverage inspection.
Can coated boards be repaired?
Yes. MG Chemicals states the cured coating can be removed with appropriate strippers or soldered through for rework. The existing product guidance identifies 435, 8309 and 8310A as removal options; verify compatibility and current remover instructions before use. Use 4352 for application thinning as directed by the current liquid TDS.
What thickness should I apply?
The manufacturer recommends a 25–75 µm film. Allow at least three minutes between coats and validate coverage and cure for your process.
Can 419E be used with automated coating equipment?
Yes. The liquid TDS provides example selective-coating settings for PVA and Nordson ASYMTEK equipment. Dilution and process settings vary by system.
Is this a substitute for a complete ESD control program?
No. The manufacturer's protection claims for a cured PCB coating do not replace workstation grounding, handling controls or assembly-level testing.
Can the liquid instructions be used for the aerosol?
Do not assume that. 419E-340G has a separate aerosol formulation and documentation; use the instructions for the specific package you purchase.
Manufacturer Application Video
Technical Documents
Safety Information
The current SDS classifies 419E liquid as highly flammable and identifies serious eye irritation, skin sensitization, respiratory irritation, and drowsiness or dizziness hazards. Read the SDS before use. Use appropriate ventilation, protective equipment and ignition controls.
Existing product warning retained pending label-specific verification: This product can expose you to chemicals including ethylene glycol, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Related Resources
Explore our Conformal Coating & PCB Protection Resource Hub, browse Conformal Coating, or shop the MG Chemicals collection.
