Silicone 1C49
HumiSeal® 1C49 conformal coating is:
- silicone based
- fluoresces under UV light
- room temperature, moisture cure
- single component
- high solids
HumiSeal 1C49 conformal coating has:
- no VOCs or solvent
- low toxicity
- excellent environmental resistance and moisture resistance
- RoHS directive 2015/863/EU
- Mil-I-46058C qualified
- IPC-CC-830 qualified
- recognized under UL file number E105698
Application of 1C49 Silicone 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. Please contact a HumiSeal representative for additional information
1C49 is designed for application without additional thinning. Solvents or other thinners should not be mixed with 1C49. 1C49 may be applied by spray, brushing, flow coating or dipping. The time required to reach a tack-free state is dependent on ambient conditions such as temperature and relative humidity. The processing guidelines contained in this document were obtained with an ambient relative humidity of 50%.
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® 1C49 may be applied using conventional spraying equipment. Spraying should be done in an environment with adequate ventilation so that the vapor and mist are carried away from the operator. The use of thinner is not required or recommended for HumiSeal® 1C49.
Brushing
Uniformity of the film depends on the component density and the operator’s technique.
| Product Specification | |
| Density, per ASTM D1475 | 0.97 ± 0.03 g/cm³ |
| Min. Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 95 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 9000 ± 1500 centipoise |
| VOC | 0 grams/litre |
| Recommended Coating Thickness | 50 – 200 microns |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | <10 mins |
| Recommended Curing Conditions | 24 hrs @ RT or 20 min @ 76°C* |
| Time required to Reach Optimum Properties | 7 days |
| Recommended Stripper | HumiSeal Stripper 1091 |
| 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 | 367 ppm /ºC |
| Glass Transition Temperature – DSC | < -65°C |
| Storage Modulus – DMA | 408 MPa @ -40ºC 1.6 MPa @ 25ºC 1.4 MPa @ 80ºC |
| Tensile, per ASTM D412 | 30-50 psi |
| Elongation, per ASTM D412 | 80-120 % |
| Build per Dip, per ASTM D823 | 5 mils |
| 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
