HumiSeal 1B66

Product Specification

HumiSeal® 1B66 is a fast-drying, single-component acrylic conformal coating. This coating provides exceptional flexibility and can be easily repaired, making it a reliable choice for protecting sensitive components. Additionally, HumiSeal® 1B66 is fully compliant with the RoHS Directive 2002/95/EC.

Application of HumiSeal® 1B66

For the successful application of a conformal coating, ensuring the cleanliness of the substrate is crucial. Surfaces must be free moisture, dirt, wax, grease, flux residues, and any other contaminants. Any contamination beneath the coating can result in issues that may lead to assembly failures.

Dipping

In certain cases, the viscosity of HumiSeal® 1B66 may need to be reduced with HumiSeal® Thinner 503 to achieve a uniform film, depending on the complexity, density, and configuration of the assembly’s components. After determining the optimal viscosity, a controlled immersion and withdrawal rate (5-15 cm/min) ensures even coating deposition. As the solvent evaporates, the viscosity will increase, requiring the addition of small amounts of HumiSeal® Thinner 503 to maintain the correct consistency. Regular checks with devices like a Zahn or Ford viscosity cup are recommended.

Spraying

HumiSeal® 1B66 is compatible with conventional spraying equipment. It should be sprayed in a well-ventilated environment to ensure vapors and mist are safely dissipated. To achieve a consistent spray pattern and avoid pinholes, HumiSeal® Thinner 521 should be added. The ratio of HumiSeal® 1B66 to HumiSeal® Thinner 521 is typically 1:1 by volume, but adjustments may be necessary depending on the equipment used and the operator’s technique.

Brushing

For brushing applications, HumiSeal® 1B66 can be mixed with a small amount of HumiSeal® Thinner 503. The uniformity of the film depends on both the density of the components and the technique of the operator.

Storage

HumiSeal® 1B66 should be stored in tightly closed containers, away extreme temperatures. The product can be stored at temperatures ranging 0 to 35°C. It is advisable to allow the product to equilibrate for 24 hours at room temperature (18-32°C) before use.

Caution

When applying HumiSeal® Conformal Coatings, ensure compliance with local and national health and safety regulations. The solvents in HumiSeal® products are flammable, and the material should not be used near open flames or sparks. Always apply in a well-ventilated area to avoid inhaling vapors or mist. Avoid skin and eye contact, and consult the MSDS/SDS before use.