HumiSeal® 1A27 is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. HumiSeal® 1A27 contains no free isocyanates.
HumiSeal® 1A27 conformal coating is:
HumiSeal® 1A27 conformal coating has:
Application of HumiSeal® 1A27 Conformal Coating
Conformal coatings can be successfully applied to substrates that have been cleaned prior to coating and also to substrates assembled with low residue “no clean” materials. Users should perform adequate testing to confirm compatibility between the conformal coating and their particular assembly materials, process conditions and cleanliness level.
Specification:
Product Specification
Density, per ASTM D1475
0.96 ± 0.02 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044
50 ± 3 %
Viscosity, per Fed-Std-141, Meth. 4287
3000 ± 1000 centipoise
VOC
480 grams/litre
Recommended Coating Thickness
25 – 75
Drying Time to Handle per Fed-Std-141, Meth. 4061
30 minutes
Optional Curing Conditions to Reach Optimum Properties
30 days at RT
30 hours @ 76°C
20 hours @ 88°C
Recommended Thinner (spraying)
HumiSeal Thinner 521
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
170 ppm/°C
Glass Transition Temperature – DSC
28°C
Modulus – DMA
18.1 MPa
Flammability, per UL 94
V-0
Dielectric Withstand Voltage, per MIL-I-46058C
>1500 volts
Dielectric Breakdown Voltage, per ASTM D149
7500 volts
Dielectric Constant, at 1MHz and 25°C per ASTM D150-98
3.6
Dissipation Factor, at 1MHz and 25°C per ASTM D150-98
0.02
Insulation Resistance, per MIL-I-46058C
2.0 x 1014 ohms(200TΩ)
Moisture Insulation Resistance, per MIL-I-46058C
1.2 x 1010 ohms (12GΩ)
Other Products in this Category
Aerosol 1B31
Urethanes Conformal coating 1A20
Urethanes Conformal coating 1A33
Urethanes Conformal coating 2A64