Technical Data Sheet FSC Flexible Silicone Coating Product Description FSC is fast drying and is designed to protect printed circuit boards, particularly those exposed to high humidity environments. Based on a high quality silicone resin, FSC exhibits excellent adhesion to a wide variety of substrates and operates within a wide temperature range. Features Fluoresces under UV light for ease of inspection. Wide operating temperature range and resistant to mould growth. Can be soldered through without fear of highly toxic gases being produced (contains no isocyanates). Non-corrosive to Cadmium and Zinc plate (contains no phenols). Cured coating can be removed with Electrolube Ultrasolve (ULS). Excellent Dielectric properties Approvals RoHS Compliant (2002/95/EC): Yes Liquid Properties Appearance: Clear translucent liquid Specific Gravity (Density) 20C: 1.05 (Bulk) g/ml VOC Content: 50% (Bulk) Solids content: 50% (Bulk) Viscosity 20C: 550 Centipoise (Bulk) Touch Dry: 10-15 minutes Recommended Drying Time: 24 Hours 20C 4 Hours 60C 2 Hours 90C 2 Coverage 25m: 15m per litre (Bulk) Dry Film Coating Colour: Colourless Operating Temperature Range: -50C to +125C Flammability: Self-extinguishing Thermal Cycling (MIL-1-46058C): Meets approval Coefficient of Expansion: 150ppm Dielectric Strength: 80 kV/mm Dielectric Constant: 2.7 20 Insulation Resistance: 1 x 10 Ohms/cm Dissipation Factor 100Hz 25C 0.001 Moisture Resistance (MIL-1-46058C): Meets approval Salt Spray (ASTM B117-03) Meets approval Electrolube, A division of H K Wentworth, Kingsbury Park, Midland Road, Swadlincote, Derbyshire, DE11 0AN Tel: +44(0) 1283-222111 Fax: +44(0) 1283-550177 www.electrolube.com BS EN ISO 9001:2000 Certificate No. FM 32082 Page 1 of 3 Packaging Description Order Code Shelf Life FSC Conformal Coating 400ml Aerosol FSC400 24 Months 5 Litre Bulk FSC05L 36 Months Non-Acrylic Thinners 1 Litre DCT01L 36 Months 5 Litre DCT05L 36 Months Removal Solvent 200ml Aerosol ULS200D 36 Months 400ml 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 FSC can be sprayed, dipped or brushed. The thickness of the coating depends on the method of application (typically 25 microns). Temperatures of less than 16C or relative humidity in excess of 75% are unsuitable for the application of FSC. 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. Also, all flux residues must be removed as they may become corrosive if left on the PCB. Electrolube manufacture a range of cleaning products using both hydrocarbon solvent and aqueous technology. Electrolube cleaning products produce results within Military specification. Spraying Bulk FSC needs to be diluted with the appropriate thinners (DCT) before spraying. The optimum viscosity to give coating quality and thickness depends on the spray equipment and conditions, but normally a suitable spray viscosity is typically 50-80 centipoise. If bulk coating material has been agitated, allow to stand until air bubbles have dispersed. FSC 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 274 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. Spraying - Aerosol When applying FSC in aerosol form care must be taken to ensure the can is not shaken before use. Shaking the can will introduce excessive air bubbles and will give a poor coating finish. The can should be held at 45, and 200mm from the substrate to be coated. The valve should then be depressed when the can is pointing slightly off target and moved at about 100mm / second across the target. To ensure the best coating results are achieved try to use a smooth sweeping motion with small overlap for successive rows. To ensure penetration of the coating beneath the components and in confined spaces, spray the assembly from all directions to give an even coating. After spraying, the boards should be placed in an air-circulating drying cabinet and left to dry. Electrolube, A division of H K Wentworth, Kingsbury Park, Midland Road, Swadlincote, Derbyshire, DE11 0AN Tel: +44(0) 1283-222111 Fax: +44(0) 1283-550177 www.electrolube.com BS EN ISO 9001:2000 Certificate No. FM 32082 Page 2 of 3