Fine-L-Kote AR Acrylic Conformal Coating

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Sku Number Name Size Units
Per Case
2103-12S Fine-L-Kote AR Conformal Coating 12 oz (340g) 12
2103-5G Fine-L-Kote AR Conformal Coating -5G 5 gal (19L) 1
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Acrylic conformal coating is recognized for its high dielectric strength, and fair moisture and abrasion resistance. What generally distinguishes acrylic coating from other resins is ease of removal. Acrylic coatings are easily and quickly removed by a variety of solvents, often without the need of agitation. This makes rework and even field repair very practical and economical.

Features & Benefits

  • Max operating temperature up to 392°F (200°C)
  • Dielectric Strength 640 volts/mil
  • Non-ozone depleting
  • Rigid, Hard Coating



When using conformal coatings in general, what causes a "milky" cure or white "foam" on the substrate?

In almost all cases, the cloudy or milky cure comes from coating in higher humidity conditions. The white foam (from an aerosol) is caused the same way. We have the following suggestions: 1) If possible, allow the substrate and coating material to come to approximately the same temperature when applying. 2) Avoid applications in RH > 60%. High humidity ranges will discolor some coating resins and will start curing others. Besides the aesthetic value, it certainly may affect adhesion to the material. 3) Specifically on the silicone coating, if the resulting application is foamy, increase the focal point of the can, ie back off to about 10 -12” from the substrate & make 2 -3 light passes rather than one heavy pass to coat the board.

What types of coverage areas are to be expected with the conformal coatings in general?

Wet film thickness = Sq. ft. per gal. | 0.1 mil = 16,040 | 0.5 mil = 3,210 | 1 mil = 1,600 | 2 mil = 802 | 3 mil = 535 | 4 mil = 401 | 5 mil = 321 | 6 mil = 267 | 7 mil = 229 | 8 mil = 201 | 9 mil = 178 | 10 mil = 160

How do you prevent the valve from clogging up when using aerosol conformal coating?

I suggest you get into the habit of clearing the valve after every use. You turn the can upside-down and spray until it only sprays propellant. If you don’t do that, you run the risk of dried coating building up in the valve or actuator button. If in the button, you can switch it for another one and it should work. If in the valve, there may not be much you can do to save the can.

How do I figure out the shelf life of a product?

The shelf life of a product can be found on either the technical data sheet (TDS), available on the product page, or by looking on the certificate on conformance (COC). The COC can be downloaded by going to Once you have the shelf life, you will need to add it to the manufacture date for a use-by date. The manufacture date can be identified by the batch number. The batch code used on most of our products are manufacture dates in the Julian Date format. The format is YYDDD, where YY = year, DDD = day. For example, 19200 translates to the 200th day of 2019, or July 19, 2019. This webpage explains and provides charts to help interpret our batch numbers:

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