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HumiSeal 1A33/521 PB65 Urethane Conformal Coating

  • Product code: 1A33/521 PB65
  • Manufacturer: Humiseal
  • Package size: 1L
  • Shelf Life: 1 L
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HumiSeal® 1A33/521 PB65 is a single component polyurethane conformal coating that has been formulated for use in automated spray equipment without requiring additional thinning. HumiSeal®
1A33/521 PB65 demonstrates excellent flexibility, fluoresces under UV light for ease of inspection and is easily repaired.

Product Specifications
Density, per ASTM D14750.93 ± 0.02 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 404440 ± 2 %
Viscosity, per Fed-Std-141, Meth. 428765 ± 5 centipoise
VOC559 grams/litre
Drying Time to Handle per Fed-Std-141, Meth. 406115 minutes
Recommended Coating Thickness25 – 75 microns
Optional Curing Conditions to Reach Optimum Properties

30 days at RT

30 hours @ 76°C

20 hours @ 88°C

Shelf Life at Room Temperature, DOM24 months
Thermal Shock, 50 cycles per MIL-I-46058C-65°C to 125°C
Coefficient of Thermal Expansion – TMA193 ppm/°C
Glass Transition Temperature – DSC26°C
Modulus – DMA27.2 MPa
Dielectric Withstand Voltage, per MIL-I-46058C>1500 volts
Dielectric Breakdown Voltage, per ASTM D1497500 volts
Dielectric Constant, at 1MHz and 25°C per ASTM D150-983.6
Dissipation Factor, at 1MHz and 25°C per ASTM D150-980.03
Insulation Resistance, per MIL-I-46058C2.0 x 1014 ohms (800TΩ)
Moisture Insulation Resistance, per MIL-I-46058C1.6 x 1010 ohms (16GΩ)
CTI, per UL746E @ 600 volts0 PLC
Fungus Resistance, per ASTM G21Passes

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