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MG Chemicals 841WB - EMF Shielding Paint

EMF Shielding Paint 841WB is a 1-part, water-based conductive paint, pigmented with highly conductive nickel flake. It is easy to use, with no let-down and no heat cure necessary. It can be applied by spray, brush or roller. It adheres strongly to most injection-molded plastics, such as ABS, PBT and PVA. It also bonds well to drywall and can be painted over with common architectural paints. 841WB is designed to reduce EMI/RFI interferences in architectural, electric musical and electronics applications.

Product Type: 1K (1 component) Coating, Conductive Coating, Waterborne Coating

Features: Electromagnetic Interference Shielding, Electromagnetic Shielding (EMI), Low VOC, Odorless, Radio Frequency Shielding (RFI)

Application Area: Printed Electronics

Compatible Substrates & Surfaces: Plastics, Wood

Application Method: Brush, Roller, Spray

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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Key Attributes
  • Provides effective EMI/RFI shielding over a broad range of frequencies
  • Non-flammable and no noxious odors
  • Ships as a non-DG by air
  • Low VOC content

Applications & Uses

Application Area
Application Method
Compatible Substrates & Surfaces
Recommended Preparation

Plastic—Clean the substrate with Isopropyl Alcohol, MG #824, so the surface is free of oils, dust, and other residues.
Drywall—For new drywall, apply directly on top of the drywall primer, after the primer has properly cured. When applying on top of existing paint, first wash the wall with a solution of T.S.P. diluted with water at a 1:10 ratio, to ensure good adhesion.

Clean-up
Clean the spray system and equipment with tap water after use.
Selective Coating
For higher volume applications, paint can be applied via selective coating equipment. Use a system with constant fluid recirculation to keep the particles from settling in the lines. A fluid nozzle ranging from 1.2 mm –1.4 mm diameter and 5–10 psi fluid pressure is recommended depending on nozzle size.
Paint Roller

This product may be applied with a standard paint roller. Thinning is not required.

Manual Spray Guns

Use a standard fluid nozzle gun to spray the paint. The settings listed below are recommendations; however, performance will vary with different brands:

  LVMP HVLP
Nozzle tip diameter 1.2–1.4 mm 1.2–1.4 mm
Inlet pressure 5–15 psi 5–15 psi
Air flow 10–15 SCFM 8.3 SCFM
Air cap 5–10 psi 5–10 psi

 

Properties

Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Density1.81g/mL
Typical Properties
ValueUnitsTest Method / Conditions
Calculated VOC28g/L
Cure Times (at 22 ˚C)24Hours
Cure Times (at 65 ˚C)3Hours
Minimum Film Thickness50μm
Recoat Time (Drywall)7Minutes
Recoat Time (Plastic)30Minutes
Recommended Film Thickness65μm
Theoretical Coverage (at 2 mil, based on 100% transfer efficiency)35800cm2/L
Viscosity (at 25 ˚C)143cP
Cured Properties
ValueUnitsTest Method / Conditions
Resistivity2.7 x 10⁻²Ω·cm
Salt Fog (at 35 °C, 95 °F, 96 h)Excellent
Service Temperature Range-40 to 120˚C
Surface Resistance (at 50 μm)1.3Ω/sq
Uncured Properties
ValueUnitsTest Method / Conditions
Solids Content60%
Cure Instructions
Allow to dry at room temperature for 24 hours, or after letting sit for 30 minutes, cure the paint in an oven for 3 hours @ 65 ˚C.

Regulatory & Compliance

Chemical Inventories

Technical Details & Test Data

Shielding Attenuation

MG Chemicals 841WB - EMF Shielding Paint - Shielding AttenuationTest performed with a two-coat thickness.

 

 

Surface Resistance by Paint Thickness

MG Chemicals 841WB - EMF Shielding Paint - Shielding Attenuation - 1

Packaging & Availability

Packaging Type
Available Packaging
Cat. No. Packaging Net Vol. Net Wt.
841WB-15ML Jar 12 mL 83 g
841WB-150ML Bottle 150 mL 271 g
841WB-850ML Can 850 mL 1.53 kg
841WB-3.78L Can 3.60 L 6.51 kg

 

Storage & Handling

Shelf Life
2 Years
Storage and Handling
Store between -20 and 27 ˚C in a dry area, away from sunlight (see SDS). If exposed to freezing temperatures during storage or transport, keep product at room temperature for at least two days and ensure it is fully homogeneous prior to use.