HFAC Acrylic Conformal Coating HFAC is a flexible and transparent acrylic conformal coating formulated without the use of hazardous aromatic solvents. It has been designed for the protection of electronic circuitry and meets the requirements of many industry standards. Transparent coating with excellent clarity and UV resistance ideal for LED applications Reduces operational hazardous free from aromatic solvents such as Toluene and Xylene Fluoresces under UV light for ease of inspection Ideal for applications requiring rework can be removed using Electrolube ULS Approvals RoHS-2 Compliant (2011/65/EU): Yes IPC-CC-830: Meets Requirements Liquid Properties Appearance: Pale Coloured Liquid Density 25C (g/ml): 0.92 VOC Content: 75% Flash Point: 12C Solids content: 25% Viscosity (mPa s 25C): 360 Touch Dry: 20-30 minutes Recommended Curing Time: 24 Hours 20C Or 2 Hours 60C 2 Coverage 25m: 9m per litre Dry Film Coating Colour: Colourless Operating Temperature Range: -65C to +125C Flammability: UL94 V-0 Thermal Cycling (MIL-1-46058C): Meets requirements Coefficient of Expansion: 130ppm Dielectric Strength: 45kV/mm Dielectric Constant: 2.5 15 Surface Insulation Resistance: 1 x 10 Dissipation Factor 1MHz, 25C: 0.01 Moisture Resistance (MIL-1-46058C): Meets requirements Description Packaging Order Code Shelf Life HFAC Conformal Coating 5 Litre HFAC05L 24 Months Medium Dry Thinners 5 Litre MDT05L 24 Months Removal Solvent 200 ml Aerosol ULS200D 36 Months 400 ml Aerosol ULS400D 36 Months 1 Litre Bulk ULS01L 72 Months 5 Litre Bulk ULS05L 72 Months 25 Litre Bulk ULS25L 72 Months Directions for Use HFAC can be sprayed, dipped or brushed. The thickness of the coating depends on the method of application (typically 40 microns). Temperatures of less than 16C or relative humidity in excess of 75% are unsuitable for its application. As is the case for all solvent based conformal coatings, adequate extraction should be used (refer to MSDS for further information). Substrates should be thoroughly cleaned before coating. This is required to ensure that satisfactory adhesion to the substrate is achieved and to prevent flux residues causing corrosion on the PCB. Electrolube manufacture a range of cleaning products using both hydrocarbon solvent and aqueous technology, which all produce results within Military specification. Spraying Bulk HFAC needs to be diluted with the appropriate thinner (MDT) before spraying. The optimum viscosity to give coating quality and thickness depends on the spray equipment and conditions, but normally a dilution ratio of 2.5:1 (HFAC:MDT) is required. Suitable spray viscosity is typically 40-70 cPs. If bulk coating material has been agitated, allow to stand until air bubbles have dispersed before use. HFAC is suitable both for use in manual spray guns and selective coating equipment. The selected nozzle should enable a suitable even spray to be applied in addition to suiting the prevailing viscosity. The normal spray gun pressure required is 275 to 413 kPa (40 60 lbs/sq.inch). After spraying, the boards should be placed in an air- circulating drying cabinet and left to dry.