MG Chemicals 842AR-900ML, Super Shield Silver Conductive Paint, 850ml Can, Case of 1
MG Chemicals 842AR-900ML, Super Shield Silver Conductive Paint, 850ml Can, Case of 1
MG Chemicals 842AR-900ML is a one-part, solvent-based acrylic lacquer pigmented with highly conductive silver flake. It provides high-frequency EMI shielding for plastic enclosures and adheres strongly to most injection-molded plastics, including ABS, PVC, nylon, and polycarbonate. The coating is smooth, hard, and abrasion resistant, with brush or spray application and no heat cure required.
Part 842AR-900ML contains 850 mL net volume in one can, with a net weight of 1.47 kg. The part number should not be read as the actual fill volume.
Best Uses / Applications
- EMI/RFI shielding of plastic enclosures and housings.
- Post-soldering board-level shielding applications where a thin coating is required.
- Prototyping and repairing electronic circuits.
- Conductive undercoat for electroplating plastic where high conductivity is required.
- Marine applications requiring a corrosion-resistant conductive coating, subject to application validation.
Key Features
- Highly conductive silver-flake pigment for high-frequency shielding.
- One-part acrylic lacquer suitable for brush or spray application.
- Quick drying with no heat cure necessary.
- Strong adhesion to many injection-molded plastics.
- Thin minimum layer dimension for board-level applications.
- Strong corrosion resistance.
- Manufacturer-described HAP-free formulation without toluene, xylene, or MEK.
- Mild solvent system described by MG Chemicals as safe on polystyrenes; validate compatibility with the specific substrate.
Technical Specifications
| Brand | MG Chemicals |
|---|---|
| Part number / SKU | 842AR-900ML |
| Net volume | 850 mL |
| Net weight | 1.47 kg |
| Packaging | One can |
| Coating type | One-part, solvent-based acrylic lacquer |
| Conductive pigment | Silver flake |
| Application | Brush or spray; follow TDS preparation and application instructions |
| Cure | Air drying; no heat cure required |
| Typical substrates | ABS, PVC, nylon, polycarbonate, and other compatible injection-molded plastics |
| Corrosion resistance | Strong, as described by the manufacturer |
842AR Package Comparison
| Part number | Net volume | Manufacturer listing |
|---|---|---|
| 842AR-P | 5 mL | Pen format |
| 842AR-900ML | 850 mL | Current can format |
| 842AR-3.78L | 3.60 L | Current larger can |
| 842AR-15ML | 12 mL | Discontinued jar |
| 842AR-150ML | 150 mL | Discontinued can |
Manufacturer-listed formats do not establish MTE stock or lead times. The discontinued sizes should not be treated as currently manufactured alternatives.
Frequently Asked Questions
Does 842AR-900ML contain 900 mL?
No. MG Chemicals lists 850 mL net volume for part 842AR-900ML, with a net weight of 1.47 kg.
What is this silver conductive paint used for?
It is used for EMI shielding of plastic enclosures, board-level shielding, circuit prototyping and repair, and conductive undercoating for electroplating plastic.
What shielding performance does it provide?
MG Chemicals describes superior high-frequency shielding. Use the TDS shielding-effectiveness data for your frequency range and coating requirements, and validate the finished assembly.
Which plastics does it adhere to?
The manufacturer lists strong adhesion to most injection-molded plastics, including ABS, PVC, nylon, and polycarbonate. Follow the TDS for surface preparation and test adhesion on the specific material.
Does it require heat curing?
No heat cure is required. Follow the TDS for drying, application, and full-cure instructions rather than assuming touch-dry means ready for service.
Can it be brushed or sprayed?
Yes. MG Chemicals lists both methods. Follow the TDS for mixing, thinning if required, equipment, and application procedure.
Does HAP-free mean ventilation is unnecessary?
No. The manufacturer describes the formulation as HAP-free and without toluene, xylene, or MEK. This does not mean hazard-free or eliminate ventilation requirements. Follow the SDS for handling, ventilation, and personal protective equipment.
Are the 15ML and 150ML sizes still made?
No. MG Chemicals marks 842AR-15ML and 842AR-150ML discontinued. Its current size table includes the 842AR-900ML can, larger 842AR-3.78L can, and 842AR-P pen.
