Humiseal 1B51 NSLU

HumiSeal 1B51NSLU Description

• HumiSeal 1B51NSLU is a fast drying, single component, synthetic rubber conformal coating that contains methylcyclohexane solvent that is more environmentally friendly than traditional solvents.
• Because of its unique base polymer, HumiSeal® 1B51NSLU has extremely low moisture vapor permeability.
• The coating demonstrates excellent flexibility, low stress on components, fluoresces under UV for ease of inspection and is easily repaired.
• HumiSeal 1B51NSLU is in full compliance with the RoHS Directive 2002/95/EC.

Technical data of HumiSeal 1B51NSLU

Application of HumiSeal 1B51NSLU

Cleanliness of the substrate is of extreme importance for the successful application of an encapsulant. Contamination under the encapsulant could cause problems that may lead to assembly failures. For best performance, surfaces should be free of moisture, dirt, wax, grease, flux residues and all other contaminants. If this product will be applied over “no clean” assembly materials, the user should conduct adequate testing to verify compatibility and reliability of the coated assembly.

Dipping

• Depending on the complexity, density and configuration of components on the assembly, it may be necessary to reduce the viscosity of HumiSeal 1B51NSLU with HumiSeal Thinner 905, 903 or 521EU in order to obtain a uniform film.
• Once optimum viscosity is determined, a controlled rate of immersion and withdrawal (5-15 cm/min) will further ensure even deposition of the coating and a uniform film.
• During the application, evaporation of solvent causes an increase in viscosity that should be adjusted by adding small amounts of HumiSeal Thinner 905, 903 or 521EU.
• Viscosity in the dip tank should be checked regularly using a simple measuring device such as a Zahn or Ford viscosity cup.

Spraying

• HumiSeal 1B51NSLU can be sprayed 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 addition of HumiSeal Thinner 905, 903 or 521EU is necessary to ensure a uniform spray pattern resulting in pinhole-free film.
• The amount of thinner and spray pressure will depend on the specific type of spray equipment used and operator technique.
• The recommended ratio of HumiSeal 1B51NSLU to HumiSeal Thinner 905, 903 or 521EU is 1:1 by volume.
• However the quantities may need to be adjusted to obtain a uniform coating.

Brushing

• HumiSeal 1B51NSLU may be brushed with a small addition of HumiSeal® Thinner 905, 903 or 521EU.
• Uniformity of the film depends on component density and operator's technique.

HumiSeal 1B51NSLU Application notes

Storage

• HumiSeal 1B51NSLU should be stored away from excessive heat or cold, in tightly closed containers.
• HumiSeal products may be stored at temperatures of 0 to 35°C.
• Prior to use, allow the product to equilibrate for 24 hours at a room temperature of 18 to 32°C.

Caution

• Application of HumiSeal Conformal Coatings should be carried out in accordance with local and National Health and Safety regulations.
• The solvents in HumiSeal Conformal Coatings are flammable.
• Material should not be used in presence of open flame or sparks. Use only in well-ventilated areas to avoid inhalation of vapours or spray. Avoid contact with skin and eyes.