Fine-L-Kote HT High-Temp Silicone Conformal Coating

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Sku Number Name Size Units
Per Case
2106-12S Fine-L-Kote HT - 12oz aerosol 12 oz (340g) 12
2106-G Fine-L-Kote HT - 1 gal liquid 1 gal (3.8L) 1
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High Temperature Silicone Coating is designed to prevent thermal break­down at high temperatures. SR provides good chemical resistance, moisture and salt spray resistance, and is very flexible. Silicone conformal coating isn’t abrasion resistant because of its rubbery nature, but that property does make it resilient against vibrational stresses. Silicone coatings are commonly used in high humidity environments, like outdoor signage. 

Features & Benefits

  • Designed for high temperature environments
  • Fast-drying silicone 1-step process
  • UL94 V-0 rated
  • Thermal resistance - to 662°F (350°C)
  • Dielectric strength - 560 volts/mil
  • Meets IPC-CC-830B
  • Passes the laboratory tests of MIL-I-46058C. However, it is not qualified on QPL-46058.
  • Moisture resistant
  • Vibration resistant - flexible
  • UV indicator for black light inspection

Applications

FAQ's

What is the difference between dielectric strength and dielectric withstand voltage?

The dielectric strength is material intrinsic property and withstand voltage is surface property which depend on thickness of the material. They can be slightly different for thicker materials, but for conformal coating, the two numbers should be very close or the same. That is because we test coating at 3-5 mils thickness, calculate, then report the value per mil.

What type of UV light / black light should I use for QC inspection of the final conformal coating?

Conformal coating with UV tracer can be inspected with any typical UV lamp which has wavelength of 320-380 nm.

What solvent can I use to thin this conformal coating?

Toluene can be used as a thinning agent. Make sure it is anhydrous, so contains as little moisture as possible.

How do you apply liquid conformal coating? (2106)

Apply to clean, moisture-free surface.  Areas not requiring coating should be masked. Application: Coating may be applied by spraying, brushing, dipping or flow coating.  Allow coating to flow around components. Cure:  A 1.0 mil coating will be tack-free in 45 minutes.  Full cure requires 24 hours @74˚F/23˚C. Heat Cure: 15 minutes @120˚F/49˚C.  An open vessel of water placed in the drying chamber will facilitate curing. UV detectable for QC inspection. Removal:  Coating may be removed by soaking in Conformal Coating Remover. Use TraceTech™ Conformal Coating Remover Pen for spot removal. After the new component is installed, areas should be cleaned and re-coated.

How do you use an aerosol conformal coating? (2106-12S)

Shake well. SURFACE MUST BE CLEAN & MOISTURE FREE. Areas not requiring coating should be masked. Coating:  Spray top to bottom, allowing coating to flow around components. Rotate board 90˚ and repeat process 2 or more times.  If nozzle clogs, clean with solvent or use new nozzle. Cure:  A 1.0 mil coating will be tack-free in 45 minutes.  Full cure requires 24 hours @74˚F/23˚C. Heat Cure: 15 minutes @120˚F/49˚C. An open vessel of water placed in the drying chamber will facilitate curing. UV detectable for QC inspection. Removal: Coating may be removed by soaking in Conformal Coating Remover. Use TraceTech™ Conformal Coating Remover Pen for spot removal. After the new component is installed, areas should be cleaned and re-coated.

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 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 https://www.techspray.com/coc. 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: https://www.techspray.com/batch-codes.

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