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HumiSeal 1A33 LOF

  • Product code: 1A33 LOF
  • Manufacturer: Humiseal
  • Package size: 1 L
  • Shelf Life: DOM at room temperature, 12 months
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HumiSeal® 1A33 LOF is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. The formula of 1A33 LOF contains curing accelerants which significantly reduce curing times compared with other polyurethane coatings. High levels of chemical resistance and physical hardness can be achieved after 4 hours at 85˚C. HumiSeal® 1A33 LOF is specially formulated using reduced odour and low toxicity solvent, making it ideal for use in many situations. Similar to other Humiseal Polyurethane coatings, 1A33 LOF provides high levels of physical and chemical protection and is supplied in a convenient 1 part solvent system, which can be cured easily. After complete cure, the properties of HumiSeal® 1A33 LOF and other HumiSeal® 1A33 products are comparable.

Product Specification
Density, per ASTM D1475 0.90 ± 0.04 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044 44.5 ± 2.5 %
Viscosity, per Fed-Std-141, Meth. 4287 195 ± 65 centipoise
VOC 488 grams/litre
Recommended Coating Thickness 25 – 75 microns
Drying Time to Handle per Fed-Std-141, Meth. 4061 45 minutes at 25˚C
Recommended Thinner Thinner 904, 600
Recommended Stripper HumiSeal® Stripper 1063
Shelf Life at Room Temperature, DOM 12 Months
Thermal Shock, 50 cycles per MIL-I-46058C -65°C to125°C
Coefficient of Thermal Expansion – TMA 193 ppm/°C
Glass Transition Temperature – DSC 26°C
Modulus – DMA 27.2 MPa
Flash point 22.5˚C *estimated
Dielectric Withstand Voltage, per MIL-I-46058C >1500 volts
Dielectric Breakdown Voltage, per ASTM D149 7500 volts

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