Fine-L-Kote UR Urethane Conformal Coating

Sku Number Name Size Units
Per Case
2104-12S Fine-L-Kote UR - 12oz aerosol 12 oz (340g) 12
2104-G Fine-L-Kote UR - 1 gal liquid 1 gal (3.8L) 1
2104-5G Fine-L-Kote UR - 5 gal liquid 5 gal (19L) 1
Packaging Order minimum case quantity only. Extra shipping fees may apply.
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Urethane conformal coating is known for its excellent moisture and chemical resistance. They are also very abrasion resistant. Due to this and their solvent resistance, they are also very difficult to remove. Like silicone, full removal generally requires specialized solvents, long soak time, and agitation like from a brush or an ultrasonic bath. Urethane conformal coating is commonly specified for aerospace applications where exposure to fuel vapors is a common concern.

For more information, check out our Essential Guide to Conformal Coating.

Features & Benefits

  • Thermal resistance - to 248°F (120°C)
  • Dielectric strength - 380 volts/mil
  • Moisture resistant
  • Chemically resistant
  • Abrasion resistant
  • UL94 V-0 – nonflammable final coat
  • Meets IPC-CC-830B
  • Passes the laboratory tests of MIL-I-46058C. However, it is not qualified on QPL-46058.
  • UV indicator for black light QC inspection

Applications


FAQ's

What does 2-step curing mean?
That just means you break the accelerated curing process into 2 stages. You basically ramp up the heat so the coating has an opportunity to level. Otherwise, you can get a wrinkling or orange peel texture. That texture doesn’t affect performance, just aesthetic. This is not an issue when curing in ambient conditions.
What is the difference between full cure and tack-free cure?

Full cure is when it meets all the final specifications. There might be some out-gassing, but it will be as hard as it is going to be, and adhesion is as good as it gets.  Tack-free is as the name suggests, not sticky so you can move it along the assembly process.

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.

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