4224-1 Optically Clear Conformal Coating Epoxy 1125 mL (38 fl oz)
Our 4224 Optically Clear Conformal Coating Epoxy offers a very strong and UV-resistant finish. This two part coating is easy to use: it does not require special or costly equipment to apply.
The 4224 epoxy coating protects electric circuits against corrosive chemicals, moisture, dirt, dust, thermal shocks, and scratches. This avoids corrosion and physical damages to electric components. It also insulates against high-voltage arcing, shorts, and static discharges.
Applications & Usages
The 4224 Optically Clear Conformal Coating Epoxy improves reliability, operational range, and lengthens the life of electronic and LED parts. You will find it mainly in corrosive environments such as farming, mining, smelting, oil exploration, and marine industries. As well, it applies to any other areas where corrosion must be avoided.
Common epoxy conformal coatings industrial uses are with electric generators, motors, transformers, relays, and equipment controllers. Commercial applications span fire alarms, sensors, automotive electronics, electrical connectors, and porcelains.
Features and Benefits
- Excellent Chemical and Abrasion Resistance
- Optically Clear: Transmission @25 µm [1 mil] <4.5% loss in optical range
- UV light stable: non yellowing
- Protects electronics from chemicals corrosion, oil, moisture, fungus, and static discharges
English MSDS - Part A
English MSDS - Part B
Spray Gun Application Instructions
Read the procedure below fully and make necessary adjustments to get the required coat thickness for your needs. Typically, one coat results in a dry film thickness of roughly 50 mm [2 mil]. For automated spray booths and spray guns alike, follow the equipment manufacturer guidelines.
Spray Equipment
MG recommends the use of multi-components, HPLV (high-volume low pressure) spray guns using the initial settings described in the following table. Adjust these settings and recommendations as required.
Initial Setting Recommendations
| Air Cap | #3 HPLV | ||
| Inlet | Air flow | Air cap | |
| Pressure | 23 psi | 13.5 | 10 psi |
| Fluid Tip | 1.3 mm | (1.5 mm)b |
Note: These recommendations are based may differ depending on the equipment brands. Please consult your spray gun manufacturer’s guide.
To hand mix a 4:1 (A:B) epoxy mixture (for one-component spray equipment)
- Stir Part A and Part B containers separately.
- Measure four parts by volume (or weight) of pre-stirred A, and pour in the mixing container.
- Measure one part by volume (or weight) of pre-stirred B, and slowly pour in the mixing container while stirring.
- Let sit for 2 to 3 minutes.
- Transfer the mixture to an HVLP spray gun cup for immediate use.
- After spraying application is finished, clean gun with MG 8328 or other suitable solvents. This step is to prevent the epoxy coating from curing inside the spray equipment.
TIP! The mixture starts curing as soon as the material is mixed, so plan to apply this material without delay. The equipment must be cleaned within 3 hours after use.
To apply the required thickness by weight
- Spray a test pattern. This step ensures good flow quality and helps establish appropriate distance to avoid runs.
- At a distance of 20 to 25 cm (8 to 10 inches), spray a thin and even coat onto the horizontal board. For best results, use spray-and-release strokes with an even motion to avoid excess paint in one spot.
- Immediately move the sample to an oven for curing.
Attention! To avoid surface wrinkles, the coated assembly should be transferred to a curing oven within 7 minutes after spraying.
To cure the conformal coating
Full cure can be achieved in 2 hours in an oven at 80 °C [176 °F]. Let stand at room temperature for an additional 30 minutes
WARNING
