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HumiSeal Urethane 1A33 LOS

  • Product code: 1A33 LOS
  • Manufacturer:
  • Package size: 1 L
  • Shelf Life: DOM at room temperature, 24 months
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HumiSeal® 1A33LOS is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. HumiSeal® 1A33LOS is a development of HumiSeal® 1A33 with reduced odor levels and lower toxicity solvents. After complete cure, the properties of HumiSeal® 1A33 LOS and HumiSeal® 1A33 are comparable. HumiSeal® 1A33LOS contains no free isocyanates and will fluoresce under UV light for inspection purposes. HumiSeal® 1A33LOS is compliant with RoHS Directive 2015/863/EU and China RoHS 2.

Typical Properties

Product Specification
Density, per ASTM D1475 0.92 ± 0.02 g/cm3
Solids Content, % by weight per Fed-Std-141, Meth. 4044 44 ± 2 %
Viscosity, per Fed-Std-141, Meth. 4287 195 ± 65 centipoise
VOC 512 grams/lire
Recommended Coating Thickness 25 – 75 microns
Drying Time to Handle per Fed-Std-141, Meth. 4061 30 minutes
Optional Curing Conditions to Reach Optimum Properties 30 days at RT30 hours @ 76°C 20 hours @ 88°C
Recommended Thinner (dipping, brushing) HumiSeal Thinner 905
Recommended Stripper HumiSeal Stripper 1063
Shelf Life at Room Temperature, DOM 24 months
Thermal Shock, 50 cycles per MIL-I-46058C -65° to 125°C
Coefficient of Thermal Expansion – TMA 193 ppm/°C
Glass Transition Temperature – DSC 26°C
Modulus – DMA 27.2 MPa
Flammability, per UL 94 Pending
Dielectric Withstand Voltage, per MIL-I-46058C >1500 volts
Insulation Resistance, per MIL-I-46058C 2.0 x 1014 ohms (200TΩ)
Moisture Insulation Resistance, per MIL-I-46058C 1.6 x 1010 ohms (16GΩ)
CTI, PLC per UL746A @ 600 volts 0

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