Silicones > 1C49LV
HumiSeal® 1C49LV is a moisture curing, low viscosity, VOC-free silicone conformal coating which provides excellent moisture and environmental protection for printed circuit assemblies. HumiSeal® 1C49LV is solvent free. The coating demonstrates outstanding flexibility, fluoresces under UV light for ease of inspection and can be repaired. HumiSeal® 1C49LV can be cured at room or at elevated temperatures. HumiSeal® 1C49LV is MIL-I-46058C qualified, IPC-CC-830 and RoHS Directive 2002/95/EC compliant, and recognized under UL File Number E105698.
Cleanliness of the substrate is of extreme importance for the successful application of a conformal coating. Surfaces must be free of moisture, dirt, wax, grease, flux residues and all other contaminants. Contamination under the coating could cause problems that may lead to assembly failures.
Brushing
Uniformity of the film depends on component density and operator's technique.
Dipping
A controlled rate of immersion and withdrawal (5-15 cm/min) will ensure even deposition of the coating and ultimately a uniform film. Blanketing dip tanks with an inert gas such as nitrogen can extend pot life.
Spraying
HumiSeal® 1C49LV may be applied using most conventional spraying equipment. When in doubt, test the ability of the spray equipment before applying coating to production boards. Spraying should be done in an environment with adequate ventilation so that the vapour and mist are carried away from the operator. The use of thinner is not required or recommended for HumiSeal® 1C49LV.
Product Specification
| Product Specification | |
| Density, per ASTM D1475 | 0.97 ± 0.03 g/cm³ |
| Min. Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 90 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 550 ± 250 centipoise |
| VOC | 0 grams/litre |
| Recommended Coating Thickness | 50 - 200 microns |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 60 min |
| Recommended Curing Conditions | 24 hrs @ RT or 20 min @ 76°C* |
| Time required to Reach Optimum Properties | 7 days |
| Recommended Stripper | HumiSeal Stripper 1090 |
| Shelf Life at Room Temperature, DOM | 12 months |
| Thermal Shock, 50 cycles per MIL-I-46058C | -65°C to 200°C |
| Coefficient of Thermal Expansion - TMA | 323 ppm /ºC above Tg |
| Glass Transition Temperature - DSC | < -65°C |
| Modulus - DMA | 9.0 MPa @ -40ºC 3.8 MPa @ 25ºC 3.2 MPa @ 80ºC |
| Flammability, per UL94 | V-1 |
| Dielectric Withstand Voltage, per MIL-I-46058C | >1500 volts |
| Dielectric Breakdown Voltage, per ASTM D149 | 7000 volts |
| Dielectric Constant, at 1MHz and 25°C per ASTM D150-98 | 2.5 |
| Dissipation Factor, at 1MHz and 25°C per ASTM D150-98 | 0.01 |
| Insulation Resistance, per MIL-I-46058C | 5.0 x 1014 ohms (500TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 1.0 x 1010 ohms (10GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
* Place an open pan of water in the oven during curing
Downloads
Datasheets
1C49 LV TDS (.pdf)
MSDS
1C49 LV MSDS - English (.pdf)
1C49 LV MSDS - French (.pdf)
1C49 LV MSDS - German (.pdf)
1C49 LV MSDS - USA (.pdf)
REACH
REACH Statement (.pdf)
RoHS
RoHS - Silicones (.pdf)
Conformal Coating Standards
Disclaimer
All values contained herein are typical values.
Please consult the Technical Data Sheet for the specific product to obtain complete information and detailed specification ranges and physical properties
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