Supernatural Gloss Trim sealant coats smooth and textured plastic surfaces in a layer of ultra-durable crystal resin around 50x thicker than a coat of wax or sealant. The result is a long-lasting, semi-permanent 'lacquer' finish that can enhance the appearance of exterior trim, whatever the colour. Longevity of the finish can sometimes be measured in years, not just months - but it is one for the experts. Most detailers will find a traditional trim product like Supernatural Glaze to be a more suitable option.
Note that Supernatural Gloss Trim Sealant is challenging to apply, due to being of a varnish-like nature (it cannot be buffed during application and needs to be applied quickly and precisely before it cures), and it may not give a consistent finish to heavily faded trim. On more modern vehicles, though, it poses less of a problem and careful application can be rewarded with spectacular results.
This 50ml bottle (enough to do 1-2 cars that have a normal amount of plastic trim) comes in a kit with a lint-free application cloth and full instructions. Always test on an inconspicuous area first if unsure of results.