HumiSeal 1C49 Conformal Coating
HumiSeal 1C49 is a moisture curing, high build, VOC-free silicone conformal coating which provides excellent moisture and environmental protection for printed circuit assemblies. HumiSeal 1C49 is solvent free. HumiSeal 1C49 can be cured at room or at elevated temperatures. HumiSeal 1C49 is MIL-I-46058C qualified, IPC-CC-830 and RoHS Directive 2011/65 / EU compliant, and recognized under UL File Number E105698.
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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.
Uniformity of the film depends on component density and operator’s technique.
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.
HumiSeal 1C49 may be applied using spraying equipment designed for high viscosity coatings. Attempting to apply the material using conventional spray equipment may result in bubbles in the cured HumiSeal 1C49 coating. 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 1C49.