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This Technical Certificate relates to the candidate installing fixed glass components in vehicles. The fixed glass components can be windscreens, side and back glasses and any mechanisms or electrical devices related to them. Vehicles can be cars, light vans or other commercial vehicles. The candidate has to prepare the apertures, ensuring that previous glass and other components are removed either for disposal or for refitting. The replacement components being installed then have to be positioned and secured within the aperture using the appropriate bonding and sealing materials. The candidate also has to be able to repair the existing components rather than replace them as this may be a more economical way of resolving the problem.