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HumiSeal 2A53 Epoxy Conformal Coating

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HumiSeal 2A53 is a dual-component epoxy coating consisting of Parts A and B, ideal for use on standard printed circuit boards and in scenarios where high resistance to solvents or chemicals is necessary. The coating can be inspected under UV light as it fluoresces. HumiSeal 2A53 has been approved by MIL-I-46058C and complies with IPC-CC-830 and RoHS Directive 2002 95 EC.

Product Specification
Density, per ASTM D1475 0.93 ± 0.03 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044 54 ± 5 %
Viscosity, per Fed-Std-141, Meth. 4287 350 ± 150 centipoise
VOC 455 grams/litre
Recommended Coating Thickness 25 – 75 microns
Drying Time to Handle per Fed-Std-141, Meth. 4061 5 hrs
Time Required to Reach Optimum Properties 7 days
Optional Curing Conditions to Reach Optimum Properties 2 hrs @ 93°C
Recommended Thinner HumiSeal Thinner 535
Pot Life at Room Temperature 24 hours
Shelf Life at Room Temperature, DOM 12 months
Thermal Shock, 50 cycles per MIL-I-46058C 100 psi
Coefficient of Thermal Expansion – TMA 56 ppm/°C
Glass Transition Temperature – DSC 19°C
Modulus – DMA 32.2 MPa
Flammability, per MIL-I-46058C Self-Extinguishing
Flammability, per UL94 V-1
Dielectric Withstand Voltage, per MIL-I-46058C >1500 volts
Dielectric Breakdown Voltage, per ASTM D149 8000 volts
Moisture Insulation Resistance, per MIL-I-46058C 2.8 x 1010 ohms (28GΩ)
Fungus Resistance, per ASTM G21 Passes
Resistance to Chemicals Excellent

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